md: raid5 run(): Fix max_degraded for raid level 4.

raid4 allows only one failed disk.

Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 1aebd3e..e1ee181 100644 (file)
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4331,7 +4331,7 @@ static int run(mddev_t *mddev)
                 */
                sector_t here_new, here_old;
                int old_disks;
-               int max_degraded = (mddev->level == 5 ? 1 : 2);
+               int max_degraded = (mddev->level == 6 ? 2 : 1);
 
                if (mddev->new_level != mddev->level ||
                    mddev->new_layout != mddev->layout ||