when region_size is not supplied by userspace and the device is very
large, there is a bug in current code since region_size is not correctly
set.
Signed-off-by: Lidong Zhong <lzhong@xxxxxxxx>
---
drivers/md/dm-raid.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 4880b69..ecef01f 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -326,7 +326,9 @@ 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 = 1 << fls(min_region_size);
+ else
+ region_size = min_region_size;
DMINFO("Choosing default region size of %lu sectors",
region_size);
} else {
--
1.8.1.4
--
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