Piteball
/
android_kernel_samsung_msm8976
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
1
1
Fork 0
Code Issues Projects Releases Wiki Activity

BACKPORT: zram: change parameter from vaild_io_request() 

(cherry-pick from commit 54850e73e86e3bc092680d1bdb84eb322f982ab1)

This patch changes parameter of valid_io_request for common usage.  The
purpose of valid_io_request() is to determine if bio request is valid or
not.

This patch use I/O start address and size instead of a BIO parameter for
common usage.

Bug: 25951511

Change-Id: I72ddd150a7cefb7f4cf33682431e284bd86c4128
Signed-off-by: karam.lee <karam.lee@lge.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Jerome Marchand <jmarchan@redhat.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: <seungho1.park@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
karam.lee 2014-12-12 16:56:50 -08:00 committed by Srinivasarao P
parent b09123e63d
commit 3d9892d18f
1 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/block/zram/zram_drv.c
View File

@ -334,18 +334,18 @@ static inline int is_partial_io(struct bio_vec *bvec)
/*
* Check if request is within bounds and aligned on zram logical blocks.
*/
static inline int valid_io_request(struct zram *zram, struct bio *bio)
static inline int valid_io_request(struct zram *zram,
sector_t start, unsigned int size)
{
u64 start, end, bound;
u64 end, bound;
/* unaligned request */
if (unlikely(bio->bi_sector & (ZRAM_SECTOR_PER_LOGICAL_BLOCK - 1)))
if (unlikely(start & (ZRAM_SECTOR_PER_LOGICAL_BLOCK - 1)))
return 0;
if (unlikely(bio->bi_size & (ZRAM_LOGICAL_BLOCK_SIZE - 1)))
if (unlikely(size & (ZRAM_LOGICAL_BLOCK_SIZE - 1)))
return 0;
start = bio->bi_sector;
end = start + (bio->bi_size >> SECTOR_SHIFT);
end = start + (size >> SECTOR_SHIFT);
bound = zram->disksize >> SECTOR_SHIFT;
/* out of range range */
if (unlikely(start >= bound || end > bound || start > end))
@ -989,7 +989,8 @@ static void zram_make_request(struct request_queue *queue, struct bio *bio)
if (unlikely(!init_done(zram)))
goto error;
if (!valid_io_request(zram, bio)) {
if (!valid_io_request(zram, bio->bi_sector,
bio->bi_size)) {
atomic64_inc(&zram->stats.invalid_io);
goto error;
}