lib/scatterlist: do not re-write gfp_flags in __sg_alloc_table()
authorMandeep Singh Baines <msb@chromium.org>
Mon, 30 Jul 2012 21:43:22 +0000 (14:43 -0700)
committerHiroshi Doyu <hdoyu@nvidia.com>
Fri, 7 Sep 2012 08:46:09 +0000 (11:46 +0300)
commit58899365f77b8d22bc738667689513360e876d30
tree413645528a52c2e216e52af4276e65135a1970d5
parentb9fd4fa966e67f743744ce9c75ce9c81133f9f42
lib/scatterlist: do not re-write gfp_flags in __sg_alloc_table()

We are seeing a lot of sg_alloc_table allocation failures using the new
drm prime infrastructure.  We isolated the cause to code in
__sg_alloc_table that was re-writing the gfp_flags.

There is a comment in the code that suggest that there is an assumption
about the allocation coming from a memory pool.  This was likely true
when sg lists were primarily used for disk I/O.

Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Cong Wang <amwang@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Rob Clark <rob.clark@linaro.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Sonny Rao <sonnyrao@chromium.org>
Cc: Olof Johansson <olofj@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/scatterlist.c