8 years agogenirq: Implement irq_get/put_desc_[bus]locked/unlock()
Thomas Gleixner [Sat, 12 Feb 2011 11:16:16 +0000]
genirq: Implement irq_get/put_desc_[bus]locked/unlock()

Most of the managing functions get the irq descriptor and lock it -
either with or without buslock. Instead of open coding this over and
over provide a common function to do that.

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

8 years agogenirq: Remove real old transition functions
Thomas Gleixner [Mon, 14 Feb 2011 19:16:43 +0000]
genirq: Remove real old transition functions

These transition helpers are stale for years now. Remove them.

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

8 years agogenirq: Remove desc->status when GENERIC_HARDIRQS_NO_COMPAT=y
Thomas Gleixner [Thu, 10 Feb 2011 21:01:25 +0000]
genirq: Remove desc->status when GENERIC_HARDIRQS_NO_COMPAT=y

If everything uses the right accessors, then enabling
GENERIC_HARDIRQS_NO_COMPAT should just work. If not it will tell you.

Don't be lazy and use the trick which I use in the core code!

git grep status_use_accessors

will unearth it in a split second. Offenders are tracked down and not
slapped with stinking trouts. This time we use frozen shark for a
better educational value.

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

8 years agogenirq: Reflect IRQ_MOVE_PCNTXT in irq_data state
Thomas Gleixner [Thu, 10 Feb 2011 21:25:31 +0000]
genirq: Reflect IRQ_MOVE_PCNTXT in irq_data state

Required by x86.

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

8 years agogenirq: Move wakeup state to irq_data
Thomas Gleixner [Thu, 10 Feb 2011 18:46:26 +0000]
genirq: Move wakeup state to irq_data

Some irq_chips need to know the state of wakeup mode for
setting the trigger type etc. Reflect it in irq_data state.

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

8 years agogenirq: Add IRQCHIP_SET_TYPE_MASKED flag
Thomas Gleixner [Thu, 10 Feb 2011 12:16:14 +0000]
genirq: Add IRQCHIP_SET_TYPE_MASKED flag

irq_chips, which require to mask the chip before changing the trigger
type should set this flag. So the core takes care of it and the
requirement for looking into desc->status in the chip goes away.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Walleij <linus.walleij@stericsson.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>

8 years agogenirq: Add flags to irq_chip
Thomas Gleixner [Thu, 10 Feb 2011 12:08:38 +0000]
genirq: Add flags to irq_chip

Looking through irq_chip implementations I noticed that some of them
have special requirements, like setting the type masked and therefor
fiddle in irq_desc->status. Add a flag field, so the core code can
handle it.

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

8 years agogenirq: Cleanup irq.h
Thomas Gleixner [Tue, 8 Feb 2011 16:27:18 +0000]
genirq: Cleanup irq.h

Put the constants into an enum and document them.

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

8 years agogenirq: Force wrapped access to desc->status in core code
Thomas Gleixner [Wed, 9 Feb 2011 13:54:49 +0000]
genirq: Force wrapped access to desc->status in core code

Force the usage of wrappers by another nasty CPP substitution.

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

8 years agogenirq: Wrap the remaning IRQ_* flags
Thomas Gleixner [Wed, 9 Feb 2011 13:44:17 +0000]
genirq: Wrap the remaning IRQ_* flags

Use wrappers to keep them away from the core code.

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

8 years agogenirq: Mirror irq trigger type bits in irq_data.state
Thomas Gleixner [Tue, 8 Feb 2011 16:28:12 +0000]
genirq: Mirror irq trigger type bits in irq_data.state

That's the data structure chip functions get provided. Also allow them
to signal the core code that they updated the flags in irq_data.state
by returning IRQ_SET_MASK_OK_NOCOPY. The default is unchanged.

The type bits should be accessed via:

val = irqd_get_trigger_type(irqdata);
and
irqd_set_trigger_type(irqdata, val);

Coders who access them directly will be tracked down and slapped with
stinking trouts.

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

8 years agogenirq: Move IRQ_AFFINITY_SET to core
Thomas Gleixner [Tue, 8 Feb 2011 16:22:00 +0000]
genirq: Move IRQ_AFFINITY_SET to core

Keep status in sync until last abuser is gone.

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

8 years agogenirq: Reuse existing can set affinty check
Thomas Gleixner [Thu, 10 Feb 2011 21:37:41 +0000]
genirq: Reuse existing can set affinty check

Add a !desc check while at it.

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

8 years agogenirq: Mirror IRQ_PER_CPU and IRQ_NO_BALANCING in irq_data.state
Thomas Gleixner [Tue, 8 Feb 2011 16:11:03 +0000]
genirq: Mirror IRQ_PER_CPU and IRQ_NO_BALANCING in irq_data.state

That's the right data structure to look at for arch code.

Accessor functions are provided.

 irqd_is_per_cpu(irqdata);
 irqd_can_balance(irqdata);

Coders who access them directly will be tracked down and slapped with
stinking trouts.

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

8 years agogenirq: Move debug code to separate header
Thomas Gleixner [Wed, 9 Feb 2011 19:44:21 +0000]
genirq: Move debug code to separate header

It'll break when I'm going to undefine the constants.

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

8 years agogenirq: Remove CHECK_IRQ_PER_CPU from core code
Thomas Gleixner [Tue, 8 Feb 2011 15:53:24 +0000]
genirq: Remove CHECK_IRQ_PER_CPU from core code

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

8 years agogenirq: Make CHECK_IRQ_PER_CPU an inline and deprecate it
Thomas Gleixner [Tue, 8 Feb 2011 15:50:00 +0000]
genirq: Make CHECK_IRQ_PER_CPU an inline and deprecate it

Its' too ugly and needs to go. The only users are core code and
parisc. Core code does not need it and parisc gets a new check once
IRQ_PER_CPU is reflected in irq_data.state.

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

8 years agogenirq: Remove CONFIG_IRQ_PER_CPU
Thomas Gleixner [Tue, 8 Feb 2011 14:40:05 +0000]
genirq: Remove CONFIG_IRQ_PER_CPU

The saving of this switch is minimal versus the ifdef mess it
creates. Simple enable PER_CPU unconditionally and remove the config
switch.

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

8 years agogenirq: Add IRQ_MOVE_PENDING to irq_data.state
Thomas Gleixner [Sat, 5 Feb 2011 14:20:04 +0000]
genirq: Add IRQ_MOVE_PENDING to irq_data.state

chip implementations need to know about it. Keep status in sync until
all users are fixed.

Accessor function: irqd_is_setaffinity_pending(irqdata)

Coders who access them directly will be tracked down and slapped with
stinking trouts.

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

8 years agogenirq: Add state field to irq_data
Thomas Gleixner [Thu, 3 Feb 2011 19:48:29 +0000]
genirq: Add state field to irq_data

Some chip implementations need to access certain status flags. With
sparse irqs that requires a lookup of the irq descriptor. Add a state
field which contains such flags.

Name it in a way which will make coders happy to access it with the
proper accessor functions. And it's easy to grep for.

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

8 years agogenirq: Move IRQ_WAKEUP to core
Thomas Gleixner [Tue, 8 Feb 2011 13:34:18 +0000]
genirq: Move IRQ_WAKEUP to core

No users outside of core.

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

8 years agogenirq: Move IRQ_SUSPENDED to core
Thomas Gleixner [Tue, 8 Feb 2011 11:44:58 +0000]
genirq: Move IRQ_SUSPENDED to core

No users outside of core.

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

8 years agogenirq: Move IRQ_MASKED to core
Thomas Gleixner [Tue, 8 Feb 2011 11:36:06 +0000]
genirq: Move IRQ_MASKED to core

Keep status in sync until all users are fixed.

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

8 years agogenirq: Move IRQ_PENDING flag to core
Thomas Gleixner [Tue, 8 Feb 2011 11:17:57 +0000]
genirq: Move IRQ_PENDING flag to core

Keep status in sync until all users are fixed.

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

8 years agogenirq: Move IRQ_DISABLED to core
Thomas Gleixner [Mon, 7 Feb 2011 21:11:30 +0000]
genirq: Move IRQ_DISABLED to core

Keep status in sync until all abusers are fixed.

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

8 years agogenirq: Move IRQ_REPLAY and IRQ_WAITING to core
Thomas Gleixner [Tue, 8 Feb 2011 10:39:15 +0000]
genirq: Move IRQ_REPLAY and IRQ_WAITING to core

No users outside of core.

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

8 years agogenirq: Move IRQ_ONESHOT to core
Thomas Gleixner [Mon, 7 Feb 2011 20:02:10 +0000]
genirq: Move IRQ_ONESHOT to core

No users outside of core.

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

8 years agogenirq: Add IRQ_INPROGRESS to core
Thomas Gleixner [Mon, 7 Feb 2011 20:48:49 +0000]
genirq: Add IRQ_INPROGRESS to core

We need to maintain the flag for now in both fields status and istate.
Add a CONFIG_GENERIC_HARDIRQS_NO_COMPAT switch to allow testing w/o
the status one. Wrap the access to status IRQ_INPROGRESS in a inline
which can be turned of with CONFIG_GENERIC_HARDIRQS_NO_COMPAT along
with the define.

There is no reason that anything outside of core looks at this. That
needs some modifications, but we'll get there.

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

8 years agogenirq: Move IRQ_POLL_INPROGRESS to core
Thomas Gleixner [Mon, 7 Feb 2011 19:55:35 +0000]
genirq: Move IRQ_POLL_INPROGRESS to core

No users outside of core.

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

8 years agogenirq: Use modify_status for set_irq_nested_thread
Thomas Gleixner [Mon, 14 Feb 2011 12:33:16 +0000]
genirq: Use modify_status for set_irq_nested_thread

No need for a separate function in the core code.

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

8 years agogenirq: Move IRQ_SPURIOUS_DISABLED to core state
Thomas Gleixner [Mon, 7 Feb 2011 19:40:54 +0000]
genirq: Move IRQ_SPURIOUS_DISABLED to core state

No users outside.

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

8 years agogenirq: Move IRQ_AUTODETECT to internal state
Thomas Gleixner [Mon, 7 Feb 2011 19:25:25 +0000]
genirq: Move IRQ_AUTODETECT to internal state

No users outside of core

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

8 years agogenirq: Protect tglx from tripping over his own feet
Thomas Gleixner [Wed, 9 Feb 2011 12:16:52 +0000]
genirq: Protect tglx from tripping over his own feet

The irq_desc.status field will either go away or renamed to
settings. Anyway we need to maintain compatibility to avoid breaking
the world and some more. While moving bits into the core, I need to
avoid that I use any of the still existing IRQ_ bits in the core code
by typos. So that file will hold the inline wrappers and some nasty
CPP tricks to break the build when typoed.

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

8 years agogenirq: Add internal state field to irq_desc
Thomas Gleixner [Mon, 7 Feb 2011 19:19:55 +0000]
genirq: Add internal state field to irq_desc

That field will contain internal state information which is not going
to be exposed to anything outside the core code - except via accessor
functions. I'm tired of everyone fiddling in irq_desc.status.

core_internal_state__do_not_mess_with_it is clear enough, annoying to
type and easy to grep for. Offenders will be tracked down and slapped
with stinking trouts.

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

8 years agogenirq: Fixup core code namespace fallout
Thomas Gleixner [Thu, 10 Feb 2011 11:20:23 +0000]
genirq: Fixup core code namespace fallout

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

8 years agogenirq: Implement generic irq_show_interrupts()
Thomas Gleixner [Thu, 16 Dec 2010 16:21:47 +0000]
genirq: Implement generic irq_show_interrupts()

All archs implement show_interrupts() in more or less the same
way. That's tons of duplicated code with different bugs with no
value. Implement a generic version and deprecate show_interrupts()

Unfortunately we need some ifdeffery for !GENERIC_HARDIRQ archs.

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

8 years agogenirq: Simplify handle_irq_event()
Thomas Gleixner [Mon, 7 Feb 2011 00:40:27 +0000]
genirq: Simplify handle_irq_event()

Now that all core users are converted one layer can go.

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

8 years agogenirq: Use handle_irq_event() in the spurious poll code
Thomas Gleixner [Mon, 7 Feb 2011 00:29:15 +0000]
genirq: Use handle_irq_event() in the spurious poll code

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

8 years agogenirq: Use handle_perpcu_event() in handle_percpu_irq()
Thomas Gleixner [Mon, 7 Feb 2011 00:25:41 +0000]
genirq: Use handle_perpcu_event() in handle_percpu_irq()

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

8 years agogenirq: Use handle_irq_event() in handle_edge_irq()
Thomas Gleixner [Mon, 7 Feb 2011 00:24:07 +0000]
genirq: Use handle_irq_event() in handle_edge_irq()

It's safe to drop the IRQ_INPROGRESS flag between action chain walks
as we are protected by desc->lock.

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

8 years agogenirq: Use handle_irq_event() in handle_fasteoi_irq()
Thomas Gleixner [Mon, 7 Feb 2011 00:23:07 +0000]
genirq: Use handle_irq_event() in handle_fasteoi_irq()

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

8 years agogenirq: Use handle_irq_event() in handle_level_irq()
Thomas Gleixner [Mon, 7 Feb 2011 00:22:17 +0000]
genirq: Use handle_irq_event() in handle_level_irq()

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

8 years agogenirq: Use handle_irq_event() in handle_simple_irq()
Thomas Gleixner [Mon, 7 Feb 2011 00:21:02 +0000]
genirq: Use handle_irq_event() in handle_simple_irq()

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

8 years agogenirq: Implement handle_irq_event()
Thomas Gleixner [Mon, 7 Feb 2011 00:08:49 +0000]
genirq: Implement handle_irq_event()

Core code replacement for the ugly camel case. It contains all the
code which is shared in all handlers.

     clear status flags
     set INPROGRESS flag
     unlock
     call action chain
     note_interrupt
     lock
     clr INPROGRESS flag

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

8 years agogenirq: Do not fiddle with IRQ_MASKED in handle_edge_irq()
Thomas Gleixner [Wed, 2 Feb 2011 21:41:17 +0000]
genirq: Do not fiddle with IRQ_MASKED in handle_edge_irq()

IRQ_MASKED is set in mask_ack_irq() anyway. Remove it from
handle_edge_irq() to allow simpler ab^HHreuse of that function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110202212551.918484270@linutronix.de>

8 years agogenirq: Consolidate IRQ_DISABLED
Thomas Gleixner [Fri, 4 Feb 2011 09:17:52 +0000]
genirq: Consolidate IRQ_DISABLED

Handle IRQ_DISABLED consistent.

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

8 years agogenirq: Remove default magic
Thomas Gleixner [Thu, 3 Feb 2011 12:23:54 +0000]
genirq: Remove default magic

Now that everything uses the wrappers, we can remove the default
functions. None of those functions is performance critical.

That makes the IRQ_MASKED flag tracking fully consistent.

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

8 years agogenirq: Consolidate disable/enable
Thomas Gleixner [Thu, 3 Feb 2011 11:27:44 +0000]
genirq: Consolidate disable/enable

Create irq_disable/enable and use them to keep the flags consistent.

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

8 years agogenirq: Consolidate startup/shutdown of interrupts
Thomas Gleixner [Wed, 2 Feb 2011 21:41:14 +0000]
genirq: Consolidate startup/shutdown of interrupts

Aside of duplicated code some of the startup/shutdown sites do not
handle the MASKED/DISABLED flags and the depth field at all. Move that
to a helper function and take care of it there.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110202212551.787481468@linutronix.de>

8 years agogenirq: Remove bogus conditional
Thomas Gleixner [Wed, 2 Feb 2011 21:41:12 +0000]
genirq: Remove bogus conditional

The if (chip->irq_shutdown) check will always evaluate to true, as we
fill in chip->irq_shutdown with default_shutdown in
irq_chip_set_defaults() if the chip does not provide its own function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110202212551.667607458@linutronix.de>

8 years agogenirq: Move irq thread flags to core
Thomas Gleixner [Mon, 7 Feb 2011 00:55:43 +0000]
genirq: Move irq thread flags to core

Soleley used in core code.

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

8 years agogenirq: Mark polled irqs and defer the real handler
Thomas Gleixner [Mon, 7 Feb 2011 09:34:30 +0000]
genirq: Mark polled irqs and defer the real handler

With the chip.end() function gone we might run into a situation where
a poll call runs and the real interrupt comes in, sees IRQ_INPROGRESS
and disables the line. That might be a perfect working one, which will
then be masked forever.

So mark them polled while the poll runs. When the real handler sees
IRQ_INPROGRESS it checks the poll flag and waits for the polling to
complete. Add the necessary amount of sanity checks to it to avoid
deadlocks.

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

8 years agogenirq: spurious: Run only one poller at a time
Thomas Gleixner [Mon, 7 Feb 2011 13:31:37 +0000]
genirq: spurious: Run only one poller at a time

No point in running concurrent pollers which confuse each other by
setting PENDING.

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

8 years agogenirq: Do not poll disabled, percpu and timer interrupts
Thomas Gleixner [Mon, 7 Feb 2011 08:52:27 +0000]
genirq: Do not poll disabled, percpu and timer interrupts

There is no point in polling disabled lines.

percpu does not make sense at all because we only poll on the cpu
we're currently running on. Also polling per_cpu interrupts is racy as
hell. The handler runs without locking so we might get a huge
surprise.

If the timer interrupt needs polling, then we wont get there anyway.

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

8 years agogenirq: Fixup poll handling
Thomas Gleixner [Mon, 7 Feb 2011 08:10:39 +0000]
genirq: Fixup poll handling

try_one_irq() contains redundant code and lots of useless checks for
shared interrupts. Check for shared before setting IRQ_INPROGRESS and
then call handle_IRQ_event() while pending. Shorter version with the
same functionality.

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

8 years agogenirq: Warn when handler enables interrupts
Thomas Gleixner [Wed, 2 Feb 2011 22:58:19 +0000]
genirq: Warn when handler enables interrupts

We run all handlers with interrupts disabled and expect them not to
enable them. Warn when we catch one who does.

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

8 years agogenirq: Plug race in report_bad_irq()
Thomas Gleixner [Mon, 7 Feb 2011 08:05:05 +0000]
genirq: Plug race in report_bad_irq()

We cannot walk the action chain unlocked. Even if IRQ_INPROGRESS is
set an action can be removed and we follow a null pointer. It's safe
to take the lock there, because the code which removes the action will
call synchronize_irq() which waits unlocked for IRQ_INPROGRESS going
away.

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

8 years agogenirq: Remove redundant thread affinity setting
Thomas Gleixner [Mon, 14 Feb 2011 10:25:02 +0000]
genirq: Remove redundant thread affinity setting

Thread affinity is already set by setup_affinity().

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

8 years agogenirq: Do not copy affinity before set
Thomas Gleixner [Mon, 7 Feb 2011 15:02:20 +0000]
genirq: Do not copy affinity before set

While rumaging through arch code I found that there are a few
workarounds which deal with the fact that the initial affinity setting
from request_irq() copies the mask into irq_data->affinity before the
chip code is called. In the normal path we unconditionally copy the
mask when the chip code returns 0.

Copy after the code is called and add a return code
IRQ_SET_MASK_OK_NOCOPY for the chip functions, which prevents the
copy. That way we see the real mask when the chip function decided to
truncate it further as some arches do. IRQ_SET_MASK_OK is 0, which is
the current behaviour.

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

8 years agogenirq: Always apply cpu online mask
Thomas Gleixner [Mon, 7 Feb 2011 16:05:08 +0000]
genirq: Always apply cpu online mask

If the affinity had been set by the user, then a later request_irq()
will honour that setting. But online cpus can have changed. So apply
the online mask and for this case as well.

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

8 years agogenirq: Rremove redundant check
Thomas Gleixner [Mon, 7 Feb 2011 16:30:50 +0000]
genirq: Rremove redundant check

IRQ_NO_BALANCING is already checked in irq_can_set_affinity() above,
no need to check it again.

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

8 years agogenirq: Simplify affinity related code
Thomas Gleixner [Mon, 7 Feb 2011 15:46:58 +0000]
genirq: Simplify affinity related code

There is lot of #ifdef CONFIG_GENERIC_PENDING_IRQ along with
duplicated code in the irq core. Move the #ifdeffery into one place
and cleanup the code so it's readable. No functional change.

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

8 years agogenirq: Namespace cleanup
Thomas Gleixner [Thu, 10 Feb 2011 10:36:33 +0000]
genirq: Namespace cleanup

The irq namespace has become quite convoluted. My bad.  Clean it up
and deprecate the old functions. All new functions follow the scheme:

irq number based:
    irq_set/get/xxx/_xxx(unsigned int irq, ...)

irq_data based:
 irq_data_set/get/xxx/_xxx(struct irq_data *d, ....)

irq_desc based:
 irq_desc_get_xxx(struct irq_desc *desc)

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

8 years agogenirq: Add missing buslock to set_irq_type(), set_irq_wake()
Thomas Gleixner [Sat, 12 Feb 2011 11:10:49 +0000]
genirq: Add missing buslock to set_irq_type(), set_irq_wake()

chips behind a slow bus cannot update the chip under desc->lock, but
we miss the chip_buslock/chip_bus_sync_unlock() calls around the set
type and set wake functions.

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

8 years agogenirq: Make nr_irqs runtime expandable
Thomas Gleixner [Wed, 16 Feb 2011 16:12:57 +0000]
genirq: Make nr_irqs runtime expandable

We face more and more the requirement to expand nr_irqs at
runtime. The reason are irq expanders which can not be detected in the
early boot stage. So we speculate nr_irqs to have enough room. Further
Xen needs extra irq numbers and we really want to avoid adding more
"detection" code into the early boot. There is no real good reason why
we need to limit nr_irqs at early boot.

Allow the allocation code to expand nr_irqs. We have already 8k extra
number space in the allocation bitmap, so lets use it.

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

8 years agoMerge branch 'irq/urgent' into irq/core
Thomas Gleixner [Sat, 19 Feb 2011 11:56:36 +0000]
Merge branch 'irq/urgent' into irq/core

Reason: Further patches are conflicting with mainline fixes

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

8 years agogenirq: Disable the SHIRQ_DEBUG call in request_threaded_irq for now
Thomas Gleixner [Fri, 18 Feb 2011 22:27:23 +0000]
genirq: Disable the SHIRQ_DEBUG call in request_threaded_irq for now

With CONFIG_SHIRQ_DEBUG=y we call a newly installed interrupt handler
in request_threaded_irq().

The original implementation (commit a304e1b8) called the handler
_BEFORE_ it was installed, but that caused problems with handlers
calling disable_irq_nosync(). See commit 377bf1e4.

It's braindead in the first place to call disable_irq_nosync in shared
handlers, but ....

Moving this call after we installed the handler looks innocent, but it
is very subtle broken on SMP.

Interrupt handlers rely on the fact, that the irq core prevents
reentrancy.

Now this debug call violates that promise because we run the handler
w/o the IRQ_INPROGRESS protection - which we cannot apply here because
that would result in a possibly forever masked interrupt line.

A concurrent real hardware interrupt on a different CPU results in
handler reentrancy and can lead to complete wreckage, which was
unfortunately observed in reality and took a fricking long time to
debug.

Leave the code here for now. We want this debug feature, but that's
not easy to fix. We really should get rid of those
disable_irq_nosync() abusers and remove that function completely.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: stable@kernel.org # .28 -> .37

8 years agogenirq: Prevent access beyond allocated_irqs bitmap
Thomas Gleixner [Thu, 17 Feb 2011 16:45:15 +0000]
genirq: Prevent access beyond allocated_irqs bitmap

Lars-Peter Clausen pointed out:

   I stumbled upon this while looking through the existing archs using
   SPARSE_IRQ.  Even with SPARSE_IRQ the NR_IRQS is still the upper
   limit for the number of IRQs.

   Both PXA and MMP set NR_IRQS to IRQ_BOARD_START, with
   IRQ_BOARD_START being the number of IRQs used by the core.

   In various machine files the nr_irqs field of the ARM machine
   defintion struct is then set to "IRQ_BOARD_START + NR_BOARD_IRQS".

   As a result "nr_irqs" will greater then NR_IRQS which then again
   causes the "allocated_irqs" bitmap in the core irq code to be
   accessed beyond its size overwriting unrelated data.

The core code really misses a sanity check there.

This went unnoticed so far as by chance the compiler/linker places
data behind that bitmap which gets initialized later on those affected
platforms.

So the obvious fix would be to add a sanity check in early_irq_init()
and break all affected platforms. Though that check wants to be
backported to stable as well, which will require to fix all known
problematic platforms and probably some more yet not known ones as
well. Lots of churn.

A way simpler solution is to allocate a slightly larger bitmap and
avoid the whole churn w/o breaking anything. Add a few warnings when
an arch returns utter crap.

Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@kernel.org # .37
Cc: Haojian Zhuang <haojian.zhuang@marvell.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>

8 years agoMerge branch 'rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip...
Linus Torvalds [Fri, 18 Feb 2011 22:20:46 +0000]
Merge branch 'rtc-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  RTC: Re-enable UIE timer/polling emulation
  RTC: Revert UIE emulation removal
  RTC: Release mutex in error path of rtc_alarm_irq_enable

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Fri, 18 Feb 2011 22:15:05 +0000]
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (37 commits)
  net: deinit automatic LIST_HEAD
  net: dont leave active on stack LIST_HEAD
  net: provide default_advmss() methods to blackhole dst_ops
  tg3: Restrict phy ioctl access
  drivers/net: Call netif_carrier_off at the end of the probe
  ixgbe: work around for DDP last buffer size
  ixgbe: fix panic due to uninitialised pointer
  e1000e: flush all writebacks before unload
  e1000e: check down flag in tasks
  isdn: hisax: Use l2headersize() instead of dup (and buggy) func.
  arp_notify: unconditionally send gratuitous ARP for NETDEV_NOTIFY_PEERS.
  cxgb4vf: Use defined Mailbox Timeout
  cxgb4vf: Quiesce Virtual Interfaces on shutdown ...
  cxgb4vf: Behave properly when CONFIG_DEBUG_FS isn't defined ...
  cxgb4vf: Check driver parameters in the right place ...
  pch_gbe: Fix the MAC Address load issue.
  iwlwifi: Delete iwl3945_good_plcp_health.
  net/can/softing: make CAN_SOFTING_CS depend on CAN_SOFTING
  netfilter: nf_iterate: fix incorrect RCU usage
  pch_gbe: Fix the issue that the receiving data is not normal.
  ...

8 years agoMerge branch 'for-linus/bugfixes' of git://xenbits.xen.org/people/ianc/linux-2.6
Linus Torvalds [Fri, 18 Feb 2011 20:44:41 +0000]
Merge branch 'for-linus/bugfixes' of git://xenbits.xen.org/people/ianc/linux-2.6

* 'for-linus/bugfixes' of git://xenbits.xen.org/people/ianc/linux-2.6:
  xen: suspend and resume system devices when running PVHVM

8 years agoMerge branch 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Linus Torvalds [Fri, 18 Feb 2011 20:36:06 +0000]
Merge branch 'fixes-2.6.38' of git://git./linux/kernel/git/tj/wq

* 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: make sure MAYDAY_INITIAL_TIMEOUT is at least 2 jiffies long
  workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable'
  workqueue: wake up a worker when a rescuer is leaving a gcwq

8 years agonet: deinit automatic LIST_HEAD
Eric Dumazet [Thu, 17 Feb 2011 22:59:19 +0000]
net: deinit automatic LIST_HEAD

commit 9b5e383c11b08784 (net: Introduce
unregister_netdevice_many()) left an active LIST_HEAD() in
rollback_registered(), with possible memory corruption.

Even if device is freed without touching its unreg_list (and therefore
touching the previous memory location holding LISTE_HEAD(single), better
close the bug for good, since its really subtle.

(Same fix for default_device_exit_batch() for completeness)

Reported-by: Michal Hocko <mhocko@suse.cz>
Tested-by: Michal Hocko <mhocko@suse.cz>
Reported-by: Eric W. Biderman <ebiderman@xmission.com>
Tested-by: Eric W. Biderman <ebiderman@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Ingo Molnar <mingo@elte.hu>
CC: Octavian Purdila <opurdila@ixiacom.com>
CC: stable <stable@kernel.org> [.33+]
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonet: dont leave active on stack LIST_HEAD
Linus Torvalds [Thu, 17 Feb 2011 22:54:38 +0000]
net: dont leave active on stack LIST_HEAD

Eric W. Biderman and Michal Hocko reported various memory corruptions
that we suspected to be related to a LIST head located on stack, that
was manipulated after thread left function frame (and eventually exited,
so its stack was freed and reused).

Eric Dumazet suggested the problem was probably coming from commit
443457242beb (net: factorize
sync-rcu call in unregister_netdevice_many)

This patch fixes __dev_close() and dev_close() to properly deinit their
respective LIST_HEAD(single) before exiting.

References: https://lkml.org/lkml/2011/2/16/304
References: https://lkml.org/lkml/2011/2/14/223

Reported-by: Michal Hocko <mhocko@suse.cz>
Tested-by: Michal Hocko <mhocko@suse.cz>
Reported-by: Eric W. Biderman <ebiderman@xmission.com>
Tested-by: Eric W. Biderman <ebiderman@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Ingo Molnar <mingo@elte.hu>
CC: Octavian Purdila <opurdila@ixiacom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agonet: provide default_advmss() methods to blackhole dst_ops
Eric Dumazet [Fri, 18 Feb 2011 19:39:01 +0000]
net: provide default_advmss() methods to blackhole dst_ops

Commit 0dbaee3b37e118a (net: Abstract default ADVMSS behind an
accessor.) introduced a possible crash in tcp_connect_init(), when
dst->default_advmss() is called from dst_metric_advmss()

Reported-by: George Spelvin <linux@horizon.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoExpand CONFIG_DEBUG_LIST to several other list operations
Linus Torvalds [Fri, 18 Feb 2011 19:32:28 +0000]
Expand CONFIG_DEBUG_LIST to several other list operations

When list debugging is enabled, we aim to readably show list corruption
errors, and the basic list_add/list_del operations end up having extra
debugging code in them to do some basic validation of the list entries.

However, "list_del_init()" and "list_move[_tail]()" ended up avoiding
the debug code due to how they were written. This fixes that.

So the _next_ time we have list_move() problems with stale list entries,
we'll hopefully have an easier time finding them..

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8 years agoMerge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspe...
Linus Torvalds [Fri, 18 Feb 2011 01:52:36 +0000]
Merge branch 'pm-fixes' of git://git./linux/kernel/git/rafael/suspend-2.6

* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM / Hibernate: Return error code when alloc_image_page() fails

8 years agoMerge branch 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
Linus Torvalds [Fri, 18 Feb 2011 01:52:17 +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:
  drm/radeon/kms: add missing frac fb div flag for dce4+
  drm/radeon/kms: do not reject X16 and Y16X16 floating-point formats on r300
  drm/nouveau: fix suspend/resume on GPUs that don't have PM support
  drm/nouveau: flips/flipd need to always set 'evict' for move_accel_cleanup()
  drm/nv40: fix tiling-related setup for a number of chipsets
  drm/nouveau: fix non-EDIDful native mode selection
  drm/nouveau: Fix detection of DDC-based LVDS on DCB15 boards.
  drm/nv04-nv40: Fix NULL dereference when we fail to find an LVDS native mode.
  drm/nv10: Fix crash when allocating a BO larger than half the available VRAM.

8 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...
Linus Torvalds [Fri, 18 Feb 2011 01:51:52 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/roland/infiniband

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/qib: Prevent double completions after a timeout or RNR error
  IB/qib: Fix double add_timer()
  RDMA/nes: Don't generate async events for unregistered devices

8 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
Linus Torvalds [Fri, 18 Feb 2011 01:51:27 +0000]
Merge git://git./linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Fix NMI startup bug which also breaks perf.
  sparc: fix size argument to find_next_zero_bit()
  sparc: use bitmap_set()
  sparc32: unaligned memory access (MNA) trap handler bug

8 years agofs/partitions: Validate map_count in Mac partition tables
Timo Warns [Thu, 17 Feb 2011 21:27:40 +0000]
fs/partitions: Validate map_count in Mac partition tables

Validate number of blocks in map and remove redundant variable.

Signed-off-by: Timo Warns <warns@pre-sense.de>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8 years agoRTC: Re-enable UIE timer/polling emulation
John Stultz [Sat, 12 Feb 2011 02:15:23 +0000]
RTC: Re-enable UIE timer/polling emulation

This patch re-enables UIE timer/polling emulation for rtc devices
that do not support alarm irqs.

CC: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
CC: Thomas Gleixner <tglx@linutronix.de>
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

8 years agoRTC: Revert UIE emulation removal
John Stultz [Sat, 12 Feb 2011 01:45:40 +0000]
RTC: Revert UIE emulation removal

Uwe pointed out that my alarm based UIE emulation is not sufficient
to replace the older timer/polling based UIE emulation on devices
where there is no alarm irq. This causes rtc devices without alarms
to return -EINVAL to UIE ioctls. The fix is to re-instate the old
timer/polling method for devices without alarm irqs.

This patch reverts the following commits:
042620a018afcfba1d678062b62e46 - Remove UIE emulation
1daeddd5962acad1bea55e524fc0fa - Cleanup removed UIE emulation declaration
b5cc8ca1c9c3a37eaddf709b2fd3e1 - Remove Kconfig symbol for UIE emulation

The emulation mode will still need to be wired-in with a following
patch before it will work.

CC: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
CC: Thomas Gleixner <tglx@linutronix.de>
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

8 years agoRTC: Release mutex in error path of rtc_alarm_irq_enable
Uwe Kleine-König [Mon, 14 Feb 2011 10:33:17 +0000]
RTC: Release mutex in error path of rtc_alarm_irq_enable

On hardware that doesn't support alarm interrupts, rtc_alarm_irq_enable
could return without releasing the ops_lock mutex.

This was introduced in
aa0be0f (RTC: Propagate error handling via rtc_timer_enqueue properly)

This patch corrects the issue by only returning once the mutex is
released.

[john.stultz: Reworded the commit log]

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

8 years agotg3: Restrict phy ioctl access
Matt Carlson [Tue, 15 Feb 2011 12:51:10 +0000]
tg3: Restrict phy ioctl access

If management firmware is present and the device is down, the firmware
will assume control of the phy.  If a phy access were allowed from the
host, it will collide with firmware phy accesses, resulting in
unpredictable behavior.  This patch fixes the problem by disallowing phy
accesses during the problematic condition.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agodrivers/net: Call netif_carrier_off at the end of the probe
Ivan Vecera [Tue, 15 Feb 2011 02:08:39 +0000]
drivers/net: Call netif_carrier_off at the end of the probe

Without calling of netif_carrier_off at the end of the probe the operstate
is unknown when the device is initially opened. By default the carrier is
on so when the device is opened and netif_carrier_on is called the link
watch event is not fired and operstate remains zero (unknown).

This patch fixes this behavior in forcedeth and r8169.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

8 years agoMerge branches 'nes' and 'qib' into for-next
Roland Dreier [Thu, 17 Feb 2011 22:04:59 +0000]
Merge branches 'nes' and 'qib' into for-next

8 years agoIB/qib: Prevent double completions after a timeout or RNR error
Mike Marciniszyn [Wed, 16 Feb 2011 15:48:25 +0000]
IB/qib: Prevent double completions after a timeout or RNR error

There is a double completion associated with error handling for RC QPs.

The sequence is:

 - The do_rc_ack() routine fields an RNR nack and there are 0
   rnr_retries configured on the QP.
 - qib_error_qp() stops the pending timer
 - qib_rc_send_complete() is called from sdma_complete()
 - qib_rc_send_complete() starts the timer because the msb of the psn
   just completed says an ack is needed.
 - a bunch of flushes occur as ipoib posts WQEs to an error'ed QP
 - rc_timeout() calls qib_restart_rc()
 - qib_restart_rc() calls qib_send_complete() with a
   IB_WC_RETRY_EXC_ERR on a wqe that has already been completed in the
   past

The fix avoids starting the timer since another packet will never
arrive.

Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

8 years agoxen: suspend and resume system devices when running PVHVM
Ian Campbell [Thu, 17 Feb 2011 10:31:20 +0000]
xen: suspend and resume system devices when running PVHVM

Otherwise we fail to properly suspend/resume all of the emulated devices.

Something between 2.6.38-rc2 and rc3 appears to have exposed this
issue, but it's always been wrong not to do this.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>

8 years agoixgbe: work around for DDP last buffer size
Amir Hanania [Tue, 15 Feb 2011 09:11:31 +0000]
ixgbe: work around for DDP last buffer size

A HW limitation was recently discovered where the last buffer in a DDP offload
cannot be a full buffer size in length. Fix the issue with a work around by
adding another buffer with size = 1.

Signed-off-by: Amir Hanania <amir.hanania@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

8 years agoixgbe: fix panic due to uninitialised pointer
Andy Gospodarek [Thu, 17 Feb 2011 09:13:13 +0000]
ixgbe: fix panic due to uninitialised pointer

Systems containing an 82599EB and running a backported driver from
upstream were panicing on boot.  It turns out hw->mac.ops.setup_sfp is
only set for 82599, so one should check to be sure that pointer is set
before continuing in ixgbe_sfp_config_module_task.  I verified by
inspection that the upstream driver has the same issue and also added a
check before the call in ixgbe_sfp_link_config.

Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

8 years agoe1000e: flush all writebacks before unload
Jesse Brandeburg [Wed, 2 Feb 2011 10:19:50 +0000]
e1000e: flush all writebacks before unload

The driver was not flushing all writebacks before unloading, possibly
causing memory to be written by the hardware after the driver had
reinitialized the rings.

This adds missing functionality to flush any pending writebacks and is
called in all spots where descriptors should be completed before the driver
begins processing.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reviewed-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

8 years agoe1000e: check down flag in tasks
Jesse Brandeburg [Wed, 2 Feb 2011 10:19:45 +0000]
e1000e: check down flag in tasks

This change is part of a fix to avoid any tasks running while the driver is
exiting and deinitializing resources.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

8 years agoMerge branch 'for-2.6.38' of git://linux-nfs.org/~bfields/linux
Linus Torvalds [Thu, 17 Feb 2011 05:53:41 +0000]
Merge branch 'for-2.6.38' of git://linux-nfs.org/~bfields/linux

* 'for-2.6.38' of git://linux-nfs.org/~bfields/linux:
  nfsd: correctly handle return value from nfsd_map_name_to_*

8 years agoMerge remote branch 'nouveau/drm-nouveau-next' of /ssd/git/drm-nouveau-next into...
Dave Airlie [Thu, 17 Feb 2011 03:56:35 +0000]
Merge remote branch 'nouveau/drm-nouveau-next' of /ssd/git/drm-nouveau-next into drm-fixes

* 'nouveau/drm-nouveau-next' of /ssd/git/drm-nouveau-next:
  drm/nouveau: fix suspend/resume on GPUs that don't have PM support
  drm/nouveau: flips/flipd need to always set 'evict' for move_accel_cleanup()
  drm/nv40: fix tiling-related setup for a number of chipsets
  drm/nouveau: fix non-EDIDful native mode selection
  drm/nouveau: Fix detection of DDC-based LVDS on DCB15 boards.
  drm/nv04-nv40: Fix NULL dereference when we fail to find an LVDS native mode.
  drm/nv10: Fix crash when allocating a BO larger than half the available VRAM.

8 years agodrm/radeon/kms: add missing frac fb div flag for dce4+
Alex Deucher [Thu, 17 Feb 2011 02:17:04 +0000]
drm/radeon/kms: add missing frac fb div flag for dce4+

The fixed ref/post dividers are set by the AdjustPll table
rather than the ss info table on dce4+.  Make sure we enable
the fractional feedback dividers when using a fixed post
or ref divider on them as well.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=29272

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: do not reject X16 and Y16X16 floating-point formats on r300
Marek Olšák [Wed, 16 Feb 2011 01:26:08 +0000]
drm/radeon/kms: do not reject X16 and Y16X16 floating-point formats on r300

Signed-off-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

8 years agodrm/nouveau: fix suspend/resume on GPUs that don't have PM support
Ben Skeggs [Thu, 17 Feb 2011 01:11:28 +0000]
drm/nouveau: fix suspend/resume on GPUs that don't have PM support

This has been broken since 2.6.37, and fixes resume on a couple of fermi
boards I have access to.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

8 years agoMerge branch 'spi/merge' of git://git.secretlab.ca/git/linux-2.6
Linus Torvalds [Thu, 17 Feb 2011 00:48:36 +0000]
Merge branch 'spi/merge' of git://git.secretlab.ca/git/linux-2.6

* 'spi/merge' of git://git.secretlab.ca/git/linux-2.6:
  spi/pxa2xx pci: fix the release - remove race

8 years agoblock: revert block_dev read-only check
Chuck Ebbert [Wed, 16 Feb 2011 23:11:53 +0000]
block: revert block_dev read-only check

This reverts commit 75f1dc0d076d ("block: check bdev_read_only() from
blkdev_get()").  That commit added stricter checking to make sure
devices that were being used read-only were actually opened in that
mode.

It turns out that the change breaks a bunch of kernel code that opens
block devices.  Affected systems include dm, md, and the loop device.
Because strict checking for read-only opens of block devices was not
done before this, the code that opens the devices was opening them
read-write even if they were being used read-only.  Auditing all that
code will take time, and new userspace packages for dm, mdadm, etc.
will also be required.

Signed-off-by: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>