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| author | Ingo Molnar <mingo@elte.hu> | 2011-08-04 09:09:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-08-04 09:09:27 +0200 |
| commit | d7619fe39d9769b4d4545cc511c891deea18ae08 (patch) | |
| tree | 0a902533414001075b2245825e145cc2e35ce985 /block/blk-lib.c | |
| parent | 9ea71503a8ed9184d2d0b8ccc4d269d05f7940ae (diff) | |
| parent | ed8f37370d83e695c0a4fa5d5fc7a83ecb947526 (diff) | |
| download | op-kernel-dev-d7619fe39d9769b4d4545cc511c891deea18ae08.zip op-kernel-dev-d7619fe39d9769b4d4545cc511c891deea18ae08.tar.gz | |
Merge branch 'linus' into core/urgent
Diffstat (limited to 'block/blk-lib.c')
| -rw-r--r-- | block/blk-lib.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/block/blk-lib.c b/block/blk-lib.c index 78e627e..2b461b4 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -59,7 +59,10 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector, * granularity */ max_discard_sectors = min(q->limits.max_discard_sectors, UINT_MAX >> 9); - if (q->limits.discard_granularity) { + if (unlikely(!max_discard_sectors)) { + /* Avoid infinite loop below. Being cautious never hurts. */ + return -EOPNOTSUPP; + } else if (q->limits.discard_granularity) { unsigned int disc_sects = q->limits.discard_granularity >> 9; max_discard_sectors &= ~(disc_sects - 1); |
