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authorMikulas Patocka <mpatocka@redhat.com>2015-10-02 11:17:37 -0400
committerMike Snitzer <snitzer@redhat.com>2015-10-02 12:02:31 -0400
commit042745ee53a0a7c1f5aff191a4a24213c6dcfb52 (patch)
tree623f271b1b370a493b1c2adc9c0b2734749a934c /drivers/md
parent2a708cff93f1845b9239bc7d6310aef54e716c6a (diff)
downloadlinux-042745ee53a0a7c1f5aff191a4a24213c6dcfb52.tar.bz2
dm raid: fix round up of default region size
Commit 3a0f9aaee028 ("dm raid: round region_size to power of two") intended to make sure that the default region size is a power of two. However, the logic in that commit is incorrect and sets the variable region_size to 0 or 1, depending on whether min_region_size is a power of two. Fix this logic, using roundup_pow_of_two(), so that region_size is properly rounded up to the next power of two. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Fixes: 3a0f9aaee028 ("dm raid: round region_size to power of two") Cc: stable@vger.kernel.org # v3.8+ Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-raid.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 97e165183e79..a0901214aef5 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -329,8 +329,7 @@ static int validate_region_size(struct raid_set *rs, unsigned long region_size)
*/
if (min_region_size > (1 << 13)) {
/* If not a power of 2, make it the next power of 2 */
- if (min_region_size & (min_region_size - 1))
- region_size = 1 << fls(region_size);
+ region_size = roundup_pow_of_two(min_region_size);
DMINFO("Choosing default region size of %lu sectors",
region_size);
} else {