dm raid: fix round up of default region size
authorMikulas Patocka <mpatocka@redhat.com>
Fri, 2 Oct 2015 15:17:37 +0000 (11:17 -0400)
committerMike Snitzer <snitzer@redhat.com>
Fri, 2 Oct 2015 16:02:31 +0000 (12:02 -0400)
commit042745ee53a0a7c1f5aff191a4a24213c6dcfb52
tree623f271b1b370a493b1c2adc9c0b2734749a934c
parent2a708cff93f1845b9239bc7d6310aef54e716c6a
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>
drivers/md/dm-raid.c