8 years agofix jiffy calculations in calibrate_delay_direct to handle overflow
Tim Deegan [Thu, 10 Feb 2011 08:50:41 +0000]
fix jiffy calculations in calibrate_delay_direct to handle overflow

Fixes a hang when booting as dom0 under Xen, when jiffies can be
quite large by the time the kernel init gets this far.

Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com>
[jbeulich@novell.com: !time_after() -> time_before_eq() as suggested by Jiri Slaby]
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8 years agoMerge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuil...
Linus Torvalds [Thu, 10 Feb 2011 00:56:33 +0000]
Merge branch 'rc-fixes' of git://git./linux/kernel/git/mmarek/kbuild-2.6

* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6:
  deb-pkg: Fix building outside of source tree (O=...).
  deb-pkg: Use $SRCARCH for include path

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
Linus Torvalds [Wed, 9 Feb 2011 19:51:40 +0000]
Merge git://git./linux/kernel/git/rusty/linux-2.6-for-linus

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  virtio: console: Update Copyright
  virtio: console: Wake up outvq on host notifications

8 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
Linus Torvalds [Wed, 9 Feb 2011 19:45:21 +0000]
Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  cdrom: support devices that have check_events but not media_changed
  cfq-iosched: Don't wait if queue already has requests.
  blkio-throttle: Avoid calling blkiocg_lookup_group() for root group
  cfq: rename a function to give it more appropriate name
  cciss: make cciss_revalidate not loop through CISS_MAX_LUNS volumes unnecessarily.
  drivers/block/aoe/Makefile: replace the use of <module>-objs with <module>-y
  loop: queue_lock NULL pointer derefence in blk_throtl_exit
  drivers/block/Makefile: replace the use of <module>-objs with <module>-y
  blktrace: Don't output messages if NOTIFY isn't set.

8 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Wed, 9 Feb 2011 19:44:55 +0000]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  FIX: md: process hangs at wait_barrier after 0->10 takeover
  md_make_request: don't touch the bio after calling make_request
  md: Don't allow slot_store while resync/recovery is happening.
  md: don't clear curr_resync_completed at end of resync.
  md: Don't use remove_and_add_spares to remove failed devices from a read-only array
  Add raid1->raid0 takeover support
  md: Remove the AllReserved flag for component devices.
  md: don't abort checking spares as soon as one cannot be added.
  md: fix the test for finding spares in raid5_start_reshape.
  md: simplify some 'if' conditionals in raid5_start_reshape.
  md: revert change to raid_disks on failure.

8 years agocdrom: support devices that have check_events but not media_changed
Simon Arlott [Wed, 9 Feb 2011 13:21:07 +0000]
cdrom: support devices that have check_events but not media_changed

Commit 93aae17af1172c40c6f74b7294e93a90c3cfaa5d ("sr: implement
sr_check_events()") replaced the media_changed op with the
check_events op in drivers/scsi/sr.c

All users that check for the CDC_MEDIA_CHANGED capbility try both
the check_events op and the media_changed op, but register_cdrom()
was requiring media_changed.

This patch fixes the capability checking.

The cdrom_select_disc ioctl is also using the two operations, so
they should be required for CDC_SELECT_DISC too.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Cc: Tejun Heo <tj@kernel.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Tested-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

8 years agocfq-iosched: Don't wait if queue already has requests.
Justin TerAvest [Wed, 9 Feb 2011 13:20:03 +0000]
cfq-iosched: Don't wait if queue already has requests.

Commit 7667aa0630407bc07dc38dcc79d29cc0a65553c1 added logic to wait for
the last queue of the group to become busy (have at least one request),
so that the group does not lose out for not being continuously
backlogged. The commit did not check for the condition that the last
queue already has some requests. As a result, if the queue already has
requests, wait_busy is set. Later on, cfq_select_queue() checks the
flag, and decides that since the queue has a request now and wait_busy
is set, the queue is expired.  This results in early expiration of the
queue.

This patch fixes the problem by adding a check to see if queue already
has requests. If it does, wait_busy is not set. As a result, time slices
do not expire early.

The queues with more than one request are usually buffered writers.
Testing shows improvement in isolation between buffered writers.

Cc: stable@kernel.org
Signed-off-by: Justin TerAvest <teravest@google.com>
Reviewed-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

8 years agovirtio: console: Update Copyright
Amit Shah [Mon, 31 Jan 2011 07:36:37 +0000]
virtio: console: Update Copyright

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

8 years agovirtio: console: Wake up outvq on host notifications
Amit Shah [Mon, 31 Jan 2011 07:36:36 +0000]
virtio: console: Wake up outvq on host notifications

The outvq needs to be woken up on host notifications so that buffers
consumed by the host can be reclaimed, outvq freed, and application
writes may proceed again.

The need for this is now finally noticed when I have qemu patches ready
to use nonblocking IO and flow control.

CC: Hans de Goede <hdegoede@redhat.com>
CC: stable@kernel.org
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Hans de Goede <hdegoede@redhat.com>

8 years agoFIX: md: process hangs at wait_barrier after 0->10 takeover
Krzysztof Wojcik [Fri, 4 Feb 2011 13:18:26 +0000]
FIX: md: process hangs at wait_barrier after 0->10 takeover

Following symptoms were observed:
1. After raid0->raid10 takeover operation we have array with 2
missing disks.
When we add disk for rebuild, recovery process starts as expected
but it does not finish- it stops at about 90%, md126_resync process
hangs in "D" state.
2. Similar behavior is when we have mounted raid0 array and we
execute takeover to raid10. After this when we try to unmount array-
it causes process umount hangs in "D"

In scenarios above processes hang at the same function- wait_barrier
in raid10.c.
Process waits in macro "wait_event_lock_irq" until the
"!conf->barrier" condition will be true.
In scenarios above it never happens.

Reason was that at the end of level_store, after calling pers->run,
we call mddev_resume. This calls pers->quiesce(mddev, 0) with
RAID10, that calls lower_barrier.
However raise_barrier hadn't been called on that 'conf' yet,
so conf->barrier becomes negative, which is bad.

This patch introduces setting conf->barrier=1 after takeover
operation. It prevents to become barrier negative after call
lower_barrier().

Signed-off-by: Krzysztof Wojcik <krzysztof.wojcik@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>

8 years agoLinux 2.6.38-rc4
Linus Torvalds [Tue, 8 Feb 2011 00:03:17 +0000]
Linux 2.6.38-rc4

8 years agoMerge master.kernel.org:/home/rmk/linux-2.6-arm
Linus Torvalds [Mon, 7 Feb 2011 23:20:11 +0000]
Merge master.kernel.org:/home/rmk/linux-2.6-arm

* master.kernel.org:/home/rmk/linux-2.6-arm:
  ALSA: AACI: allow writes to MAINCR to take effect
  ARM: Update mach-types
  ARM: 6652/1: ep93xx: correct the end address of the AC97 memory resource
  ARM: mxs/imx28: remove now unused clock lookup "fec.0"
  ARM: mxs: fix clock base address missing
  ARM: mxs: acknowledge gpio irq
  ARM: mach-imx/mach-mx25_3ds: Fix section type
  ARM: imx: Add VPR200 and MX51_3DS entries to uncompress.h
  ARM i.MX23: use correct register for setting the rate
  ARM i.MX23/28: remove secondary field from struct clk. It's unused
  ARM i.MX28: use correct register for setting the rate
  ARM i.MX28: fix bit operation

8 years agomd_make_request: don't touch the bio after calling make_request
Chris Mason [Tue, 8 Feb 2011 00:21:48 +0000]
md_make_request: don't touch the bio after calling make_request

md_make_request was calling bio_sectors() for part_stat_add
after it was calling the make_request function.  This is
bad because the make_request function can free the bio and
because the bi_size field can change around.

The fix here was suggested by Jens Axboe.  It saves the
sector count before the make_request call.  I hit this
with CONFIG_DEBUG_PAGEALLOC turned on while trying to break
his pretty fusionio card.

Cc: <stable@kernel.org>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: NeilBrown <neilb@suse.de>

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
Linus Torvalds [Mon, 7 Feb 2011 22:06:18 +0000]
Merge git://git./linux/kernel/git/mason/btrfs-unstable

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (33 commits)
  Btrfs: Fix page count calculation
  btrfs: Drop __exit attribute on btrfs_exit_compress
  btrfs: cleanup error handling in btrfs_unlink_inode()
  Btrfs: exclude super blocks when we read in block groups
  Btrfs: make sure search_bitmap finds something in remove_from_bitmap
  btrfs: fix return value check of btrfs_start_transaction()
  btrfs: checking NULL or not in some functions
  Btrfs: avoid uninit variable warnings in ordered-data.c
  Btrfs: catch errors from btrfs_sync_log
  Btrfs: make shrink_delalloc a little friendlier
  Btrfs: handle no memory properly in prepare_pages
  Btrfs: do error checking in btrfs_del_csums
  Btrfs: use the global block reserve if we cannot reserve space
  Btrfs: do not release more reserved bytes to the global_block_rsv than we need
  Btrfs: fix check_path_shared so it returns the right value
  btrfs: check return value of btrfs_start_ioctl_transaction() properly
  btrfs: fix return value check of btrfs_join_transaction()
  fs/btrfs/inode.c: Add missing IS_ERR test
  btrfs: fix missing break in switch phrase
  btrfs: fix several uncheck memory allocations
  ...

8 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Linus Torvalds [Mon, 7 Feb 2011 22:05:38 +0000]
Merge branch 'merge' of git://git./linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Fix hcall tracepoint recursion
  powerpc/numa: Fix bug in unmap_cpu_from_node
  powerpc/numa: Disable VPHN on dedicated processor partitions
  powerpc/numa: Add length when creating OF properties via VPHN
  powerpc/numa: Check for all VPHN changes
  powerpc/numa: Only use active VPHN count fields
  powerpc/pseries: Remove unnecessary variable initializations in numa.c
  powerpc/pseries: Fix brace placement in numa.c
  powerpc/pseries: Fix typo in VPHN comments
  powerpc: Fix some 6xx/7xxx CPU setup functions
  powerpc: Pass the right cpu_spec to ->setup_cpu() on 64-bit
  powerpc/book3e: Protect complex macro args in mmu-book3e.h
  powerpc: Fix pfn_valid() when memory starts at a non-zero address

8 years agoMerge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 7 Feb 2011 22:05:24 +0000]
Merge branch 'omap-fixes-for-linus' of git://git./linux/kernel/git/tmlind/linux-omap-2.6

* 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6:
  arm: omap4: panda: remove usb_nop_xceiv_register(v1)
  OMAP1: Fix non-working LCD on OMAP310
  OMAP3: Devkit8000: Change lcd power pin
  omap1: remove duplicated #include
  arm: mach-omap2: mux: free allocated memory on error exit
  arm: mach-omap2: board-rm680: fix rm680_vemmc regulator constraints
  OMAP: PM: SmartReflex: Fix possible null pointer read access
  OMAP: PM: SmartReflex: Fix possible memory leak
  arm: mach-omap2: voltage: debugfs: fix memory leak
  OMAP3: PM: fix save secure RAM to restore MPU power state
  OMAP: PM: SmartReflex: Add missing IS_ERR test

8 years agoMerge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 7 Feb 2011 22:04:43 +0000]
Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, nx: Mark the ACPI resume trampoline code as +x

8 years agoCRED: Fix memory and refcount leaks upon security_prepare_creds() failure
Tetsuo Handa [Mon, 7 Feb 2011 13:36:16 +0000]
CRED: Fix memory and refcount leaks upon security_prepare_creds() failure

In prepare_kernel_cred() since 2.6.29, put_cred(new) is called without
assigning new->usage when security_prepare_creds() returned an error.  As a
result, memory for new and refcount for new->{user,group_info,tgcred} are
leaked because put_cred(new) won't call __put_cred() unless old->usage == 1.

Fix these leaks by assigning new->usage (and new->subscribers which was added
in 2.6.32) before calling security_prepare_creds().

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8 years agoCRED: Fix BUG() upon security_cred_alloc_blank() failure
Tetsuo Handa [Mon, 7 Feb 2011 13:36:10 +0000]
CRED: Fix BUG() upon security_cred_alloc_blank() failure

In cred_alloc_blank() since 2.6.32, abort_creds(new) is called with
new->security == NULL and new->magic == 0 when security_cred_alloc_blank()
returns an error.  As a result, BUG() will be triggered if SELinux is enabled
or CONFIG_DEBUG_CREDENTIALS=y.

If CONFIG_DEBUG_CREDENTIALS=y, BUG() is called from __invalid_creds() because
cred->magic == 0.  Failing that, BUG() is called from selinux_cred_free()
because selinux_cred_free() is not expecting cred->security == NULL.  This does
not affect smack_cred_free(), tomoyo_cred_free() or apparmor_cred_free().

Fix these bugs by

(1) Set new->magic before calling security_cred_alloc_blank().

(2) Handle null cred->security in creds_are_invalid() and selinux_cred_free().

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
Linus Torvalds [Mon, 7 Feb 2011 22:02:06 +0000]
Merge git://git./linux/kernel/git/sfrench/cifs-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  cifs: remove checks for ses->status == CifsExiting
  cifs: add check for kmalloc in parse_dacl
  cifs: don't send an echo request unless NegProt has been done
  cifs: enable signing flag in SMB header when server has it on
  cifs: Possible slab memory corruption while updating extended stats (repost)
  CIFS: Fix variable types in cifs_iovec_read/write (try #2)
  cifs: fix length vs. total_read confusion in cifs_demultiplex_thread

8 years agoBtrfs: Fix page count calculation
Yan, Zheng [Tue, 18 Jan 2011 05:34:40 +0000]
Btrfs: Fix page count calculation

take offset of start position into account when calculating page count.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

8 years agoMerge branch 'fixes'
Russell King [Mon, 7 Feb 2011 19:07:10 +0000]
Merge branch 'fixes'

8 years agocifs: remove checks for ses->status == CifsExiting
Jeff Layton [Mon, 7 Feb 2011 13:54:35 +0000]
cifs: remove checks for ses->status == CifsExiting

ses->status is never set to CifsExiting, so these checks are
always false.

Tested-by: JG <jg@cms.ac>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

8 years agoMerge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into fixes
Russell King [Mon, 7 Feb 2011 15:15:37 +0000]
Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into fixes

8 years agoALSA: AACI: allow writes to MAINCR to take effect
Russell King [Sat, 5 Feb 2011 10:41:55 +0000]
ALSA: AACI: allow writes to MAINCR to take effect

The AACI TRM requires the MAINCR enable bit to be held zero for two
bitclk cycles plus three apb_pclk cycles.  Use a delay of 1us to
ensure this.

Ensure that writes to MAINCR to change the addressed codec only happen
when required, and that they take effect in a similar manner to the
above, otherwise we seem to occasionally have stuck slot busy bits.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

8 years agoARM: Update mach-types
Russell King [Mon, 7 Feb 2011 08:59:29 +0000]
ARM: Update mach-types

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

8 years agox86, nx: Mark the ACPI resume trampoline code as +x
H. Peter Anvin [Mon, 7 Feb 2011 05:16:09 +0000]
x86, nx: Mark the ACPI resume trampoline code as +x

We reserve lowmem for the things that need it, like the ACPI
wakeup code, way early to guarantee availability.  This happens
before we set up the proper pagetables, so set_memory_x() has no
effect.

Until we have a better solution, use an initcall to mark the
wakeup code executable.

Originally-by: Matthieu Castet <castet.matthieu@free.fr>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Matthias Hopf <mhopf@suse.de>
Cc: rjw@sisk.pl
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <4D4F8019.2090104@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

8 years agopowerpc: Fix hcall tracepoint recursion
Anton Blanchard [Thu, 21 Oct 2010 00:52:12 +0000]
powerpc: Fix hcall tracepoint recursion

Spinlocks on shared processor partitions use H_YIELD to notify the
hypervisor we are waiting on another virtual CPU. Unfortunately this means
the hcall tracepoints can recurse.

The patch below adds a percpu depth and checks it on both the entry and
exit hcall tracepoints.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: stable@kernel.org

8 years agopowerpc/numa: Fix bug in unmap_cpu_from_node
Anton Blanchard [Sat, 29 Jan 2011 12:37:16 +0000]
powerpc/numa: Fix bug in unmap_cpu_from_node

When converting to the new cpumask code I screwed up:

-       if (cpu_isset(cpu, numa_cpumask_lookup_table[node])) {
-               cpu_clear(cpu, numa_cpumask_lookup_table[node]);
+       if (cpumask_test_cpu(cpu, node_to_cpumask_map[node])) {
+               cpumask_set_cpu(cpu, node_to_cpumask_map[node]);

This was introduced in commit 25863de07af9 (powerpc/cpumask: Convert NUMA code
to new cpumask API)

Fix it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: <stable@kernel.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc/numa: Disable VPHN on dedicated processor partitions
Anton Blanchard [Sat, 29 Jan 2011 12:35:22 +0000]
powerpc/numa: Disable VPHN on dedicated processor partitions

There is no need to start up the timer and monitor topology changes on a
dedicated processor partition, so disable it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc/numa: Add length when creating OF properties via VPHN
Anton Blanchard [Sat, 29 Jan 2011 12:28:04 +0000]
powerpc/numa: Add length when creating OF properties via VPHN

The rest of the NUMA code expects an OF associativity property with
the first cell containing the length. Without this fix all topology changes
cause us to misparse the property and put the cpu into node 0.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc/numa: Check for all VPHN changes
Anton Blanchard [Sat, 29 Jan 2011 12:26:19 +0000]
powerpc/numa: Check for all VPHN changes

The hypervisor uses unsigned 1 byte counters to signal topology changes to
the OS. Since they can wrap we need to check for any difference, not just if
the hypervisor count is greater than the previous count.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc/numa: Only use active VPHN count fields
Anton Blanchard [Sat, 29 Jan 2011 12:24:34 +0000]
powerpc/numa: Only use active VPHN count fields

VPHN supports up to 8 distance fields but the number of entries in
ibm,associativity-reference-points signifies how many are in use.
Don't look at all the VPHN counts, only distance_ref_points_depth
worth.

Since we already cap our distance metrics at MAX_DISTANCE_REF_POINTS,
use that to size the VPHN arrays and add a BUILD_BUG_ON to avoid it growing
larger than the VPHN maximum of 8.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc/pseries: Remove unnecessary variable initializations in numa.c
Jesse Larrew [Thu, 20 Jan 2011 19:01:35 +0000]
powerpc/pseries: Remove unnecessary variable initializations in numa.c

Remove unnecessary variable initializations in VPHN functions.

Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc/pseries: Fix brace placement in numa.c
Jesse Larrew [Thu, 20 Jan 2011 19:01:13 +0000]
powerpc/pseries: Fix brace placement in numa.c

Fix brace placement in VPHN code.

Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc/pseries: Fix typo in VPHN comments
Jesse Larrew [Thu, 20 Jan 2011 19:00:51 +0000]
powerpc/pseries: Fix typo in VPHN comments

Correct a spelling error in VPHN comments in numa.c.

Signed-off-by: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc: Fix some 6xx/7xxx CPU setup functions
Benjamin Herrenschmidt [Thu, 20 Jan 2011 20:35:23 +0000]
powerpc: Fix some 6xx/7xxx CPU setup functions

Some of those functions try to adjust the CPU features, for example
to remove NAP support on some revisions. However, they seem to use
r5 as an index into the CPU table entry, which might have been right
a long time ago but no longer is. r4 is the right register to use.

This probably caused some off behaviours on some PowerMac variants
using 750cx or 7455 processor revisions.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: stable@kernel.org

8 years agopowerpc: Pass the right cpu_spec to ->setup_cpu() on 64-bit
Benjamin Herrenschmidt [Thu, 20 Jan 2011 20:36:03 +0000]
powerpc: Pass the right cpu_spec to ->setup_cpu() on 64-bit

When calling setup_cpu() on 64-bit, we pass a pointer to the
cputable entry we have found. This used to be fine when cur_cpu_spec
was a pointer to that entry, but nowadays, we copy the entry into
a separate variable, and we do so before we call the setup_cpu()
callback. That means that any attempt by that callback at patching
the CPU table entry (to adjust CPU features for example) will patch
the wrong table.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc/book3e: Protect complex macro args in mmu-book3e.h
Scott Wood [Thu, 27 Jan 2011 10:30:00 +0000]
powerpc/book3e: Protect complex macro args in mmu-book3e.h

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agopowerpc: Fix pfn_valid() when memory starts at a non-zero address
Scott Wood [Thu, 27 Jan 2011 10:31:38 +0000]
powerpc: Fix pfn_valid() when memory starts at a non-zero address

max_mapnr is a pfn, not an index innto mem_map[].  So don't add
ARCH_PFN_OFFSET a second time.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

8 years agoMerge branch 'ixp4xx' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6
Linus Torvalds [Sun, 6 Feb 2011 20:05:58 +0000]
Merge branch 'ixp4xx' of git://git./linux/kernel/git/chris/linux-2.6

* 'ixp4xx' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6:
  arm/ixp4xx: Rename FREQ macro to avoid collisions
  IXP4xx: Fix qmgr_release_queue() flushing unexpected queue entries.

8 years agoMerge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 6 Feb 2011 20:05:15 +0000]
Merge branch 'timers-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  lockdep, timer: Fix del_timer_sync() annotation
  RTC: Prevents a division by zero in kernel code.

8 years agoMerge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 6 Feb 2011 20:04:49 +0000]
Merge branch 'irq-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  m32r: Fixup last __do_IRQ leftover
  genirq: Add missing status flags to modification mask

8 years agoMerge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 6 Feb 2011 20:04:16 +0000]
Merge branch 'perf-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf stat: Fix aggreate counter reading accounting
  tracing: Replace syscall_meta_data struct array with pointer array
  tracepoints: Fix section alignment using pointer array
  tracing: Replace trace_event struct array with pointer array

8 years agoMerge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 6 Feb 2011 20:03:10 +0000]
Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86-32: Make sure the stack is set up before we use it
  x86, mtrr: Avoid MTRR reprogramming on BP during boot on UP platforms
  x86, nx: Don't force pages RW when setting NX bits

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
Linus Torvalds [Sun, 6 Feb 2011 20:02:42 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
  ALSA: use linux/io.h to fix compile warnings
  ALSA: hda - Fix memory leaks in conexant jack arrays
  ASoC: CX20442: fix NULL pointer dereference
  ASoC: Amstrad Delta: fix const related build error
  ALSA: oxygen: fix output routing on Xonar DG
  sound: silent echo'ed messages in Makefile
  ASoC: Fix mask/val_mask confusion snd_soc_dapm_put_volsw()
  ASoC: DaVinci: fix kernel panic due to uninitialized platform_data
  ALSA: HDA: Fix microphone(s) on Lenovo Edge 13
  ASoC: Fix module refcount for auxiliary devices
  ALSA: HDA: cxt5066 - Use asus model for Asus U50F, select correct SPDIF output
  ALSA: HDA: Add a new model "asus" for Conexant 5066/205xx
  ALSA: HDA: Refactor some redundant code for Conexant 5066/205xx

8 years agoarm/ixp4xx: Rename FREQ macro to avoid collisions
Ben Hutchings [Sat, 11 Dec 2010 20:17:54 +0000]
arm/ixp4xx: Rename FREQ macro to avoid collisions

FREQ is a ridiculously short name for a platform-specific macro in a
generic header, and it now conflicts with an enumeration in the
gspca/ov519 driver.

Also delete conditional reference to ixp4xx_get_board_tick_rate()
which is not defined anywhere.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>

8 years agoIXP4xx: Fix qmgr_release_queue() flushing unexpected queue entries.
Krzysztof Hałasa [Mon, 3 May 2010 21:22:06 +0000]
IXP4xx: Fix qmgr_release_queue() flushing unexpected queue entries.

Queues should be empty when released, if not, there is a safety valve.
Make sure the queue is usable after it triggers.

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>

8 years agobtrfs: Drop __exit attribute on btrfs_exit_compress
Alexey Charkov [Wed, 2 Feb 2011 21:15:35 +0000]
btrfs: Drop __exit attribute on btrfs_exit_compress

As this function is called in some error paths while not
removing the module, the __exit attribute prevents the kernel
image from linking when btrfs is compiled in statically.

Signed-off-by: Alexey Charkov <alchark@gmail.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

8 years agobtrfs: cleanup error handling in btrfs_unlink_inode()
Tsutomu Itoh [Thu, 3 Feb 2011 03:16:25 +0000]
btrfs: cleanup error handling in btrfs_unlink_inode()

When btrfs_alloc_path() fails, btrfs_free_path() need not be called.
Therefore, it changes the branch ahead.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

8 years agoBtrfs: exclude super blocks when we read in block groups
Josef Bacik [Wed, 2 Feb 2011 15:53:47 +0000]
Btrfs: exclude super blocks when we read in block groups

This has been resulting in a BUT_ON(ret) after btrfs_reserve_extent in
btrfs_cow_file_range.  The reason is we don't actually calculate the bytes_super
for a block group until we go to cache it, which means that the space_info can
hand out reservations for space that it doesn't actually have, and we can run
out of data space.  This is also a problem if you are using space caching since
we don't ever calculate bytes_super for the block groups.  So instead everytime
we read a block group call exclude_super_stripes, which calculates the
bytes_super for the block group so it can be left out of the space_info.  Then
whenever caching completes we just call free_excluded_extents so that the super
excluded extents are freed up.  Also if we are unmounting and we hit any block
groups that haven't been cached we still need to call free_excluded_extents to
make sure things are cleaned up properly.  Thanks,

Reported-by: Arne Jansen <sensille@gmx.net>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

8 years agoBtrfs: make sure search_bitmap finds something in remove_from_bitmap
Josef Bacik [Thu, 3 Feb 2011 02:39:52 +0000]
Btrfs: make sure search_bitmap finds something in remove_from_bitmap

When we're cleaning up the tree log we need to be able to remove free space from
the block group.  The problem is if that free space spans bitmaps we would not
find the space since we're looking for too many bytes.  So make sure the amount
of bytes we search for is limited to either the number of bytes we want, or the
number of bytes left in the bitmap.  This was tested by a user who was hitting
the BUG() after search_bitmap.  With this patch he can now mount his fs.
Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

8 years agoMerge branch 'timers/locking'
Ingo Molnar [Sun, 6 Feb 2011 11:59:22 +0000]
Merge branch 'timers/locking'

8 years agocifs: add check for kmalloc in parse_dacl
Stanislav Fomichev [Sat, 5 Feb 2011 23:05:28 +0000]
cifs: add check for kmalloc in parse_dacl

Exit from parse_dacl if no memory returned from the call to kmalloc.

Signed-off-by: Stanislav Fomichev <kernel@fomichev.me>
Signed-off-by: Steve French <sfrench@us.ibm.com>

8 years agom32r: Fixup last __do_IRQ leftover
Thomas Gleixner [Sat, 5 Feb 2011 20:39:28 +0000]
m32r: Fixup last __do_IRQ leftover

Somehow I managed to miss the last __do_IRQ caller when I cleanup the
remaining users. m32r is fully converted to the generic irq layer, but
I managed to not commit the conversion of __do_IRQ() to
generic_handle_irq() after compile testing the quilt series :(

Pointed-out-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Paul Mundt <lethal@linux-sh.org>

8 years agogenirq: Add missing status flags to modification mask
Thomas Gleixner [Sat, 5 Feb 2011 15:25:25 +0000]
genirq: Add missing status flags to modification mask

The mask which filters out the valid bits which can be set via
irq_modify_status() is missing IRQ_NO_BALANCING, which breaks UV.

Add IRQ_PER_CPU as well to avoid another one line patch for 39.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

8 years agoARM: 6652/1: ep93xx: correct the end address of the AC97 memory resource
Mika Westerberg [Sat, 5 Feb 2011 08:52:33 +0000]
ARM: 6652/1: ep93xx: correct the end address of the AC97 memory resource

The last register is at offset 0xa8 making the resource end to be 0xac - 1
instead of 0xb0 - 1.

Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

8 years agox86-32: Make sure the stack is set up before we use it
H. Peter Anvin [Sat, 5 Feb 2011 00:14:11 +0000]
x86-32: Make sure the stack is set up before we use it

Since checkin ebba638ae723d8a8fc2f7abce5ec18b688b791d7 we call
verify_cpu even in 32-bit mode.  Unfortunately, calling a function
means using the stack, and the stack pointer was not initialized in
the 32-bit setup code!  This code initializes the stack pointer, and
simplifies the interface slightly since it is easier to rely on just a
pointer value rather than a descriptor; we need to have different
values for the segment register anyway.

This retains start_stack as a virtual address, even though a physical
address would be more convenient for 32 bits; the 64-bit code wants
the other way around...

Reported-by: Matthieu Castet <castet.matthieu@free.fr>
LKML-Reference: <4D41E86D.8060205@free.fr>
Tested-by: Kees Cook <kees.cook@canonical.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

8 years agocifs: don't send an echo request unless NegProt has been done
Jeff Layton [Fri, 4 Feb 2011 22:09:50 +0000]
cifs: don't send an echo request unless NegProt has been done

When the socket to the server is disconnected, the client more or less
immediately calls cifs_reconnect to reconnect the socket. The NegProt
and SessSetup however are not done until an actual call needs to be
made.

With the addition of the SMB echo code, it's possible that the server
will initiate a disconnect on an idle socket. The client will then
reconnect the socket but no NegotiateProtocol request is done. The
SMBEcho workqueue job will then eventually pop, and an SMBEcho will be
sent on the socket. The server will then reject it since no NegProt was
done.

The ideal fix would be to either have the socket not be reconnected
until we plan to use it, or to immediately do a NegProt when the
reconnect occurs. The code is not structured for this however. For now
we must just settle for not sending any echoes until the NegProt is
done.

Reported-by: JG <jg@cms.ac>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Fri, 4 Feb 2011 21:20:01 +0000]
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (68 commits)
  net: can: janz-ican3: world-writable sysfs termination file
  net: can: at91_can: world-writable sysfs files
  MAINTAINERS: update email ids of the be2net driver maintainers.
  bridge: Don't put partly initialized fdb into hash
  r8169: prevent RxFIFO induced loops in the irq handler.
  r8169: RxFIFO overflow oddities with 8168 chipsets.
  r8169: use RxFIFO overflow workaround for 8168c chipset.
  include/net/genetlink.h: Allow genlmsg_cancel to accept a NULL argument
  net: Provide compat support for SIOCGETMIFCNT_IN6 and SIOCGETSGCNT_IN6.
  net: Support compat SIOCGETVIFCNT ioctl in ipv4.
  net: Fix bug in compat SIOCGETSGCNT handling.
  niu: Fix races between up/down and get_stats.
  tcp_ecn is an integer not a boolean
  atl1c: Add missing PCI device ID
  s390: Fix possibly wrong size in strncmp (smsgiucv)
  s390: Fix wrong size in memcmp (netiucv)
  qeth: allow OSA CHPARM change in suspend state
  qeth: allow HiperSockets framesize change in suspend
  qeth: add more strict MTU checking
  qeth: show new mac-address if its setting fails
  ...

8 years agonet: can: janz-ican3: world-writable sysfs termination file
Vasiliy Kulikov [Fri, 4 Feb 2011 02:23:53 +0000]
net: can: janz-ican3: world-writable sysfs termination file

Don't allow everybody to set terminator via sysfs.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonet: can: at91_can: world-writable sysfs files
Vasiliy Kulikov [Fri, 4 Feb 2011 02:23:50 +0000]
net: can: at91_can: world-writable sysfs files

Don't allow everybody to write to mb0_id file.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Acked-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoMAINTAINERS: update email ids of the be2net driver maintainers.
Ajit Khaparde [Fri, 4 Feb 2011 21:03:35 +0000]
MAINTAINERS: update email ids of the be2net driver maintainers.

Signed-off-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agobridge: Don't put partly initialized fdb into hash
Pavel Emelyanov [Fri, 4 Feb 2011 21:02:36 +0000]
bridge: Don't put partly initialized fdb into hash

The fdb_create() puts a new fdb into hash with only addr set. This is
not good, since there are callers, that search the hash w/o the lock
and access all the other its fields.

Applies to current netdev tree.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agocifs: enable signing flag in SMB header when server has it on
Jeff Layton [Fri, 4 Feb 2011 12:21:26 +0000]
cifs: enable signing flag in SMB header when server has it on

cifs_sign_smb only generates a signature if the correct Flags2 bit is
set. Make sure that it gets set correctly if we're sending an async
call.

This patch fixes:

    https://bugzilla.kernel.org/show_bug.cgi?id=28142

Reported-and-Tested-by: JG <jg@cms.ac>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

8 years agocifs: Possible slab memory corruption while updating extended stats (repost)
Shirish Pargaonkar [Thu, 3 Feb 2011 20:31:18 +0000]
cifs: Possible slab memory corruption while updating extended stats (repost)

Updating extended statistics here can cause slab memory corruption
if a callback function frees slab memory (mid_entry).

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

8 years agoCRED: Fix kernel panic upon security_file_alloc() failure.
Tetsuo Handa [Fri, 4 Feb 2011 18:13:24 +0000]
CRED: Fix kernel panic upon security_file_alloc() failure.

In get_empty_filp() since 2.6.29, file_free(f) is called with f->f_cred == NULL
when security_file_alloc() returned an error.  As a result, kernel will panic()
due to put_cred(NULL) call within RCU callback.

Fix this bug by assigning f->f_cred before calling security_file_alloc().

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8 years agoMerge branch 'tip/perf/urgent-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Ingo Molnar [Fri, 4 Feb 2011 18:02:53 +0000]
Merge branch 'tip/perf/urgent-2' of git://git./linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent

8 years agoMerge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
Linus Torvalds [Fri, 4 Feb 2011 18:02:22 +0000]
Merge branch 'drm-fixes' of git://git./linux/kernel/git/airlied/drm-2.6

* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (27 commits)
  gpu/stub: fix acpi_video build error, fix stub kconfig dependencies
  drm/radeon/kms: dynamically allocate power state space
  drm/radeon/kms: fix s/r issues with bios scratch regs
  agp: ensure GART has an address before enabling it
  Revert "agp: AMD AGP is used on UP1100 & UP1500 alpha boxen"
  amd-k7-agp: remove non-x86 code
  drm/radeon/kms/evergreen: always set certain VGT regs at CP init
  drm/radeon/kms: add updated ib_execute function for evergreen
  drm/radeon: remove 0x4243 pci id
  drm/radeon/kms: Enable new pll calculation for avivo+ asics
  drm/radeon/kms: add new pll algo for avivo asics
  drm/radeon/kms: add pll debugging output
  drm/radeon/kms: switch back to min->max pll post divider iteration
  drm/radeon/kms: rv6xx+ thermal sensor fixes
  drm/nv50: fix display on 0x50
  drm/nouveau: correctly pair hwmon_init and hwmon_fini
  drm/i915: Only bind to function 0 of the PCI device
  drm/i915: Suppress spurious vblank interrupts
  drm: Avoid leak of adjusted mode along quick set_mode paths
  drm: Simplify and defend later checks when disabling a crtc
  ...

8 years agodrm: Only set DPMS ON when actually configuring a mode
Keith Packard [Fri, 4 Feb 2011 00:57:28 +0000]
drm: Only set DPMS ON when actually configuring a mode

In drm_crtc_helper_set_config, instead of always forcing all outputs
to DRM_MODE_DPMS_ON, only set them if the CRTC is actually getting a
mode set, as any mode set will turn all outputs on.

This fixes https://lkml.org/lkml/2011/1/24/457

Signed-off-by: Keith Packard <keithp@keithp.com>
Cc: stable@kernel.org (2.6.37)
Reported-and-tested-by: Carlos R. Mafra <crmafra2@gmail.com>
Tested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8 years agoMerge branch 'fix/asoc' into for-linus
Takashi Iwai [Fri, 4 Feb 2011 16:08:53 +0000]
Merge branch 'fix/asoc' into for-linus

8 years agoMerge branch 'kbuild/packaging' into kbuild/rc-fixes
Michal Marek [Fri, 4 Feb 2011 14:01:57 +0000]
Merge branch 'kbuild/packaging' into kbuild/rc-fixes

8 years agodeb-pkg: Fix building outside of source tree (O=...).
Nicolas de Pesloüan [Mon, 24 Jan 2011 13:41:41 +0000]
deb-pkg: Fix building outside of source tree (O=...).

When building linux-headers package using deb-pkg, builddeb erroneously assume
current directory is the source tree. This is not true if building in another
directory, using make O=... deb-pkg.

This patch fix this problem.

Signed-off-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr>
Tested-by: Nikolai Kondrashov <spbnick@gmail.com>
Acked-by: maximilian attems <max@stro.at>
Signed-off-by: Michal Marek <mmarek@suse.cz>

8 years agor8169: prevent RxFIFO induced loops in the irq handler.
Francois Romieu [Thu, 3 Feb 2011 16:27:52 +0000]
r8169: prevent RxFIFO induced loops in the irq handler.

While the RxFIFO interruption is masked for most 8168, nothing prevents
it to appear in the irq status word. This is no excuse to crash.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Ivan Vecera <ivecera@redhat.com>
Cc: Hayes <hayeswang@realtek.com>

8 years agor8169: RxFIFO overflow oddities with 8168 chipsets.
Francois Romieu [Thu, 3 Feb 2011 11:02:36 +0000]
r8169: RxFIFO overflow oddities with 8168 chipsets.

Some experiment-based action to prevent my 8168 chipsets locking-up hard
in the irq handler under load (pktgen ~1Mpps). Apparently a reset is not
always mandatory (is it at all ?).

- RTL_GIGA_MAC_VER_12
- RTL_GIGA_MAC_VER_25
  Missed ~55% packets. Note:
  - this is an old SiS 965L motherboard
  - the 8168 chipset emits (lots of) control frames towards the sender

- RTL_GIGA_MAC_VER_26
  The chipset does not go into a frenzy of mac control pause when it
  crashes yet but it can still be crashed. It needs more work.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Ivan Vecera <ivecera@redhat.com>
Cc: Hayes <hayeswang@realtek.com>

8 years agor8169: use RxFIFO overflow workaround for 8168c chipset.
Ivan Vecera [Thu, 27 Jan 2011 11:24:11 +0000]
r8169: use RxFIFO overflow workaround for 8168c chipset.

I found that one of the 8168c chipsets (concretely XID 1c4000c0) starts
generating RxFIFO overflow errors. The result is an infinite loop in
interrupt handler as the RxFIFOOver is handled only for ...MAC_VER_11.
With the workaround everything goes fine.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Cc: Hayes <hayeswang@realtek.com>

8 years agolockdep, timer: Fix del_timer_sync() annotation
Peter Zijlstra [Thu, 3 Feb 2011 14:09:41 +0000]
lockdep, timer: Fix del_timer_sync() annotation

Calling local_bh_enable() will want to actually start processing
softirqs, which isn't a good idea since this can get called with IRQs
disabled.

Cure this by using _local_bh_enable() which doesn't start processing
softirqs, and use raw_local_irq_save() to avoid any softirqs from
happening without letting lockdep think IRQs are in fact disabled.

Reported-by: Nick Bowler <nbowler@elliptictech.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Yong Zhang <yong.zhang0@gmail.com>
LKML-Reference: <20110203141548.039540914@chello.nl>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

8 years agoinclude/net/genetlink.h: Allow genlmsg_cancel to accept a NULL argument
Julia Lawall [Fri, 28 Jan 2011 05:43:40 +0000]
include/net/genetlink.h: Allow genlmsg_cancel to accept a NULL argument

nlmsg_cancel can accept NULL as its second argument, so for similarity,
this patch extends genlmsg_cancel to be able to accept a NULL second
argument as well.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoCIFS: Fix variable types in cifs_iovec_read/write (try #2)
Pavel Shilovsky [Mon, 31 Jan 2011 13:03:08 +0000]
CIFS: Fix variable types in cifs_iovec_read/write (try #2)

Variable 'i' should be unsigned long as it's used in circle with num_pages,
and bytes_read/total_written should be ssize_t according to return value.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

8 years agogpu/stub: fix acpi_video build error, fix stub kconfig dependencies
Randy Dunlap [Tue, 1 Feb 2011 19:17:28 +0000]
gpu/stub: fix acpi_video build error, fix stub kconfig dependencies

The comments under "config STUB_POULSBO" are close to correct,
but they are not being followed.  This patch updates them to reflect
the requirements for THERMAL.

This build error is caused by STUB_POULSBO selecting ACPI_VIDEO
when ACPI_VIDEO's config requirements are not met.

ERROR: "thermal_cooling_device_register" [drivers/acpi/video.ko] undefined!
ERROR: "thermal_cooling_device_unregister" [drivers/acpi/video.ko] undefined!

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Dave Airlie <airlied@redhat.com>

8 years agonet: Provide compat support for SIOCGETMIFCNT_IN6 and SIOCGETSGCNT_IN6.
David S. Miller [Fri, 4 Feb 2011 01:59:32 +0000]
net: Provide compat support for SIOCGETMIFCNT_IN6 and SIOCGETSGCNT_IN6.

Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonet: Support compat SIOCGETVIFCNT ioctl in ipv4.
David S. Miller [Fri, 4 Feb 2011 01:24:28 +0000]
net: Support compat SIOCGETVIFCNT ioctl in ipv4.

Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonet: Fix bug in compat SIOCGETSGCNT handling.
David S. Miller [Fri, 4 Feb 2011 01:21:31 +0000]
net: Fix bug in compat SIOCGETSGCNT handling.

Commit 709b46e8d90badda1898caea50483c12af178e96 ("net: Add compat
ioctl support for the ipv4 multicast ioctl SIOCGETSGCNT") added the
correct plumbing to handle SIOCGETSGCNT properly.

However, whilst definiting a proper "struct compat_sioc_sg_req" it
isn't actually used in ipmr_compat_ioctl().

Correct this oversight.

Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus
Linus Torvalds [Fri, 4 Feb 2011 00:31:43 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/hch/hfsplus

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hch/hfsplus:
  hfsplus: fix up a comparism in hfsplus_file_extend
  hfsplus: fix two memory leaks in wrapper.c
  hfsplus: do not leak buffer on error
  hfsplus: fix failed mount handling

8 years agoniu: Fix races between up/down and get_stats.
David S. Miller [Fri, 4 Feb 2011 00:12:50 +0000]
niu: Fix races between up/down and get_stats.

As reported by Flavio Leitner, there is no synchronization to protect
NIU's get_stats method from seeing a NULL pointer in either
np->rx_rings or np->tx_rings.  In fact, as far as ->ndo_get_stats
is concerned, these values are set completely asynchronously.

Flavio attempted to fix this using a RW semaphore, which in fact
works most of the time.  However, dev_get_stats() can be invoked
from non-sleepable contexts in some cases, so this fix doesn't
work in all cases.

So instead, control the visibility of the np->{rx,tx}_ring pointers
when the device is being brough up, and use properties of the device
down sequence to our advantage.

In niu_get_stats(), return immediately if netif_running() is false.
The device shutdown sequence first marks the device as not running (by
clearing the __LINK_STATE_START bit), then it performans a
synchronize_rcu() (in dev_deactive_many()), and then finally it
invokes the driver ->ndo_stop() method.

This guarentees that all invocations of niu_get_stats() either see
netif_running() as false, or they see the channel pointers before
->ndo_stop() clears them out.

If netif_running() is true, protect against startup races by loading
the np->{rx,tx}_rings pointer into a local variable, and punting if
it is NULL.  Use ACCESS_ONCE to prevent the compiler from reloading
the pointer on us.

Also, during open, control the order in which the pointers and the
ring counts become visible globally using SMP write memory barriers.
We make sure the np->num_{rx,tx}_rings value is stable and visible
before np->{rx,tx}_rings is.

Such visibility control is not necessary on the niu_free_channels()
side because of the RCU sequencing that happens during device down as
described above.  We are always guarenteed that all niu_get_stats
calls are finished, or will see netif_running() false, by the time
->ndo_stop is invoked.

Reported-by: Flavio Leitner <fleitner@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agodrm/radeon/kms: dynamically allocate power state space
Alex Deucher [Wed, 2 Feb 2011 23:42:03 +0000]
drm/radeon/kms: dynamically allocate power state space

We previously used a static array, but some new systems
had more states then we had array space, so dynamically
allocate space based on the number of states in the vbios.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=33851

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

8 years agodrm/radeon/kms: fix s/r issues with bios scratch regs
Alex Deucher [Thu, 3 Feb 2011 00:46:06 +0000]
drm/radeon/kms: fix s/r issues with bios scratch regs

The accelerate mode bit gets checked by certain atom
command tables to set up some register state.  It needs
to be clear when setting modes and set when not.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=26942

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

8 years agoagp: ensure GART has an address before enabling it
Stephen Kitt [Mon, 31 Jan 2011 22:25:43 +0000]
agp: ensure GART has an address before enabling it

Some BIOSs (eg.  the AMI BIOS on the Asus P4P800 motherboard) don't
initialise the GART address, and pcibios_assign_resources() can ignore it
because it can be marked as a host bridge (see
https://bugzilla.kernel.org/show_bug.cgi?id=24392#c5 for details).  This
was handled correctly up to 2.6.35, but the pci_enable_device() cleanup in
2.6.36 96576a9e1a0cdb8 ("agp: intel-agp: do not use PCI resources before
pci_enable_device()") means that the kernel tries to enable the GART
before assigning it an address; in such cases the GART overlaps with other
device assignments and ends up being disabled.

This patch fixes https://bugzilla.kernel.org/show_bug.cgi?id=24392

Note that I imagine efficeon-agp.c probably has the same problem, but
I can't test that and I'd like to make sure this patch is suitable for
-stable (since 2.6.36 and 2.6.37 are affected).

Signed-off-by: Stephen Kitt <steve@sk2.org>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Maciej Rutecki <maciej.rutecki@gmail.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Kulikov Vasiliy <segooon@gmail.com>
Cc: Florian Mickler <florian@mickler.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

8 years agoRevert "agp: AMD AGP is used on UP1100 & UP1500 alpha boxen"
Matt Turner [Tue, 1 Feb 2011 16:54:15 +0000]
Revert "agp: AMD AGP is used on UP1100 & UP1500 alpha boxen"

This reverts commit f191f144079b0083c6fa7d01a4acbd7263fb5032.

The AMD 751 and 761 chipsets are used on the UP1000, UP1100, and UP1500
OEM motherboards, but they neglect to do anything to make AGP work.

According to Ivan Kokshaysky:
There is quite fundamental conflict between the Alpha architecture and
x86 AGP implementation - Alpha is entirely cache coherent by design,
while x86 AGP is not (I mean native AGP DMA transactions, not a PCI over
AGP). There are no such things as non-cacheable mappings or software
support for cache flushing/invalidation on Alpha, so x86 AGP code won't
work on Nautilus.

So there's no point in allowing this driver to be configured on Alpha.

Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

8 years agoamd-k7-agp: remove non-x86 code
Matt Turner [Tue, 1 Feb 2011 16:54:16 +0000]
amd-k7-agp: remove non-x86 code

amd-k7-agp can't be built on Alpha anymore, so remove now unnecessary
code.

Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

8 years agodrm/radeon/kms/evergreen: always set certain VGT regs at CP init
Alex Deucher [Wed, 2 Feb 2011 17:37:41 +0000]
drm/radeon/kms/evergreen: always set certain VGT regs at CP init

These should be handled by the clear_state setup, but set them
directly as well just to be sure.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

8 years agodrm/radeon/kms: add updated ib_execute function for evergreen
Alex Deucher [Wed, 2 Feb 2011 17:37:40 +0000]
drm/radeon/kms: add updated ib_execute function for evergreen

Adds new packet to disable DX9 constant emulation.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

8 years agohfsplus: fix up a comparism in hfsplus_file_extend
Christoph Hellwig [Wed, 2 Feb 2011 16:40:33 +0000]
hfsplus: fix up a comparism in hfsplus_file_extend

Revert an incorrect hunk from commit b2837fcf4994e699a4def002e26f274d95b387c1,

"hfsplus: %L-to-%ll, macro correction, and remove unneeded braces"

revert a pointless change of comparism operation argument order, which turned
out to not even be equivalent.

Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Christoph Hellwig <hch@tuxera.com>

8 years agohfsplus: fix two memory leaks in wrapper.c
Chuck Ebbert [Wed, 2 Feb 2011 15:55:06 +0000]
hfsplus: fix two memory leaks in wrapper.c

Signed-Off-By: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Christoph Hellwig <hch@tuxera.com>

8 years agohfsplus: do not leak buffer on error
Chuck Ebbert [Tue, 1 Feb 2011 21:41:55 +0000]
hfsplus: do not leak buffer on error

Signed-Off-By: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Christoph Hellwig <hch@tuxera.com>

8 years agohfsplus: fix failed mount handling
Christoph Hellwig [Wed, 2 Feb 2011 16:32:39 +0000]
hfsplus: fix failed mount handling

Currently the error handling in hfsplus_fill_super is a mess, and can
lead to accessing fields in the superblock that haven't been even set
up yet.  Fix this by making sure we do not set up sb->s_root until we
have the mount fully set up, and before that do proper step by step
unwinding instead of using hfsplus_put_super as a big hammer.

Reported-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: Christoph Hellwig <hch@tuxera.com>

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
Linus Torvalds [Thu, 3 Feb 2011 21:53:58 +0000]
Merge git://git./linux/kernel/git/jejb/scsi-rc-fixes-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6:
  [SCSI] libsas: fix runaway error handler problem
  [SCSI] fix incorrect value of SCSI_MAX_SG_CHAIN_SEGMENTS due to include file ordering
  [SCSI] arcmsr: Fix the issue of system hangup after commands timeout on ARC-1200
  [SCSI] mpt2sas: fix Integrated Raid unsynced on shutdown problem
  [SCSI] mpt2sas: Kernel Panic during Large Topology discovery
  [SCSI] mpt2sas: Fix the race between broadcast asyn event and scsi command completion
  [SCSI] mpt2sas: Correct resizing calculation for max_queue_depth
  [SCSI] mpt2sas: fix internal device reset for older firmware prior to MPI Rev K
  [SCSI] mpt2sas: Fix device removal handshake for zoned devices

8 years agox86, mm: avoid possible bogus tlb entries by clearing prev mm_cpumask after switching mm
Suresh Siddha [Thu, 3 Feb 2011 20:20:04 +0000]
x86, mm: avoid possible bogus tlb entries by clearing prev mm_cpumask after switching mm

Clearing the cpu in prev's mm_cpumask early will avoid the flush tlb
IPI's while the cr3 is still pointing to the prev mm.  And this window
can lead to the possibility of bogus TLB fills resulting in strange
failures.  One such problematic scenario is mentioned below.

 T1. CPU-1 is context switching from mm1 to mm2 context and got a NMI
     etc between the point of clearing the cpu from the mm_cpumask(mm1)
     and before reloading the cr3 with the new mm2.

 T2. CPU-2 is tearing down a specific vma for mm1 and will proceed with
     flushing the TLB for mm1.  It doesn't send the flush TLB to CPU-1
     as it doesn't see that cpu listed in the mm_cpumask(mm1).

 T3. After the TLB flush is complete, CPU-2 goes ahead and frees the
     page-table pages associated with the removed vma mapping.

 T4. CPU-2 now allocates those freed page-table pages for something
     else.

 T5. As the CR3 and TLB caches for mm1 is still active on CPU-1, CPU-1
     can potentially speculate and walk through the page-table caches
     and can insert new TLB entries.  As the page-table pages are
     already freed and being used on CPU-2, this page walk can
     potentially insert a bogus global TLB entry depending on the
     (random) contents of the page that is being used on CPU-2.

 T6. This bogus TLB entry being global will be active across future CR3
     changes and can result in weird memory corruption etc.

To avoid this issue, for the prev mm that is handing over the cpu to
another mm, clear the cpu from the mm_cpumask(prev) after the cr3 is
changed.

Marking it for -stable, though we haven't seen any reported failure that
can be attributed to this.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: stable@kernel.org [v2.6.32+]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8 years agoRTC: Prevents a division by zero in kernel code.
Marcelo Roberto Jimenez [Wed, 2 Feb 2011 18:04:02 +0000]
RTC: Prevents a division by zero in kernel code.

This patch prevents a user space program from calling the RTC_IRQP_SET
ioctl with a negative value of frequency. Also, if this call is make
with a zero value of frequency, there would be a division by zero in the
kernel code.

[jstultz: Also initialize irq_freq to 1 to catch other divbyzero issues]

CC: Alessandro Zummo <a.zummo@towertech.it>
CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
Signed-off-by: John Stultz <john.stultz@linaro.org>

8 years agoMerge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/acme...
Ingo Molnar [Thu, 3 Feb 2011 19:57:34 +0000]
Merge branch 'perf/urgent' of git://git./linux/kernel/git/acme/linux-2.6 into perf/urgent