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authorMike Snitzer <snitzer@redhat.com>2013-10-18 09:44:49 -0600
committerJens Axboe <axboe@kernel.dk>2013-11-08 09:00:17 -0700
commitd82ae52e68892338068e7559a0c0657193341ce4 (patch)
treeaab870f6e8b0dfdddade4b0f2e738b37e388c94c /block/blk-settings.c
parent7c8a3679e3d8e9d92d58f282161760a0e247df97 (diff)
downloadlinux-linaro-stable-d82ae52e68892338068e7559a0c0657193341ce4.tar.gz
block: properly stack underlying max_segment_size to DM device
Without this patch all DM devices will default to BLK_MAX_SEGMENT_SIZE (65536) even if the underlying device(s) have a larger value -- this is due to blk_stack_limits() using min_not_zero() when stacking the max_segment_size limit. 1073741824 before patch: 65536 after patch: 1073741824 Reported-by: Lukasz Flis <l.flis@cyfronet.pl> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org # v3.3+ Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-settings.c')
-rw-r--r--block/blk-settings.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index c50ecf0ea3b1..53309333c2f0 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -144,6 +144,7 @@ void blk_set_stacking_limits(struct queue_limits *lim)
lim->discard_zeroes_data = 1;
lim->max_segments = USHRT_MAX;
lim->max_hw_sectors = UINT_MAX;
+ lim->max_segment_size = UINT_MAX;
lim->max_sectors = UINT_MAX;
lim->max_write_same_sectors = UINT_MAX;
}