md: Fix rdev_size_store with size == 0
Fix rdev_size_store with size == 0.
size == 0 means to use the largest size allowed by the
underlying device and is used when modifying an active array.
This fixes a regression introduced by
commit d7027458d68b2f1752a28016dcf2ffd0a7e8f567
Cc: <stable@kernel.org>
Signed-off-by: Chris Webb <chris@arachsys.com>
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0a3a4bd..7d8c2bb 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2106,8 +2106,6 @@
if (strict_strtoull(buf, 10, &size) < 0)
return -EINVAL;
- if (size < my_mddev->size)
- return -EINVAL;
if (my_mddev->pers && rdev->raid_disk >= 0) {
if (my_mddev->persistent) {
size = super_types[my_mddev->major_version].
@@ -2118,9 +2116,9 @@
size = (rdev->bdev->bd_inode->i_size >> 10);
size -= rdev->data_offset/2;
}
- if (size < my_mddev->size)
- return -EINVAL; /* component must fit device */
}
+ if (size < my_mddev->size)
+ return -EINVAL; /* component must fit device */
rdev->size = size;
if (size > oldsize && my_mddev->external) {