diff options
author | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2019-03-28 14:32:06 +0100 |
---|---|---|
committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2019-03-28 14:32:06 +0100 |
commit | 32aca03c2ce868d3412da0bb6ce6798c7bea357e (patch) | |
tree | 01630dc4a6935df99bf7d11d34ff8d384fed86e2 /block/blk-lib.c | |
parent | cfbbc7703fff59c67761c93a8b1de29a79f9841c (diff) | |
parent | 60771fc402877163d07569addadcf18b86acb455 (diff) |
Merge tag 'v4.9.166' into 4.9-2.3.x-imx
This is the 4.9.166 stable release
Diffstat (limited to 'block/blk-lib.c')
-rw-r--r-- | block/blk-lib.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/block/blk-lib.c b/block/blk-lib.c index 18abda862915..43fa53b81847 100644 --- a/block/blk-lib.c +++ b/block/blk-lib.c @@ -63,10 +63,18 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, unsigned int req_sects; sector_t end_sect, tmp; - /* Make sure bi_size doesn't overflow */ - req_sects = min_t(sector_t, nr_sects, UINT_MAX >> 9); + /* + * Issue in chunks of the user defined max discard setting, + * ensuring that bi_size doesn't overflow + */ + req_sects = min_t(sector_t, nr_sects, + q->limits.max_discard_sectors); + if (!req_sects) + goto fail; + if (req_sects > UINT_MAX >> 9) + req_sects = UINT_MAX >> 9; - /** + /* * If splitting a request, and the next starting sector would be * misaligned, stop the discard at the previous aligned sector. */ @@ -100,6 +108,14 @@ int __blkdev_issue_discard(struct block_device *bdev, sector_t sector, *biop = bio; return 0; + +fail: + if (bio) { + submit_bio_wait(bio); + bio_put(bio); + } + *biop = NULL; + return -EOPNOTSUPP; } EXPORT_SYMBOL(__blkdev_issue_discard); |