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authorMike Snitzer <snitzer@redhat.com>2010-12-17 08:34:20 +0100
committerJens Axboe <jaxboe@fusionio.com>2010-12-17 08:36:01 +0100
commit72d4cd9f38b5ed96b75df4c622be25e1c2648dd3 (patch)
treea229645cbbc63aad3fa5b57ea9f092e618588890 /drivers
parente692cb668fdd5a712c6ed2a2d6f2a36ee83997b4 (diff)
block: max hardware sectors limit wrapper
Implement blk_limits_max_hw_sectors() and make blk_queue_max_hw_sectors() a wrapper around it. DM needs this to avoid setting queue_limits' max_hw_sectors and max_sectors directly. dm_set_device_limits() now leverages blk_limits_max_hw_sectors() logic to establish the appropriate max_hw_sectors minimum (PAGE_SIZE). Fixes issue where DM was incorrectly setting max_sectors rather than max_hw_sectors (which caused dm_merge_bvec()'s max_hw_sectors check to be ineffective). Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@kernel.org Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/md/dm-table.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index e2da1912a2cb..4d705cea0f8c 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -517,9 +517,8 @@ int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev,
*/
if (q->merge_bvec_fn && !ti->type->merge)
- limits->max_sectors =
- min_not_zero(limits->max_sectors,
- (unsigned int) (PAGE_SIZE >> 9));
+ blk_limits_max_hw_sectors(limits,
+ (unsigned int) (PAGE_SIZE >> 9));
return 0;
}
EXPORT_SYMBOL_GPL(dm_set_device_limits);