md/raid6: Fix raid-6 read-error correction in degraded state

Fix: Raid-6 was not trying to correct a read-error when in
singly-degraded state and was instead dropping one more device, going to
doubly-degraded state. This patch fixes this behaviour.

Tested-by: Janos Haar <janos.haar@netcenter.hu>
Signed-off-by: Gabriele A. Trombetti <g.trombetti.lkrnl1213@logicschema.com>
Reported-by: Janos Haar <janos.haar@netcenter.hu>
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 58ea0ecae7c3..15348c393b5d 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1527,7 +1527,7 @@ static void raid5_end_read_request(struct bio * bi, int error)
 
                 clear_bit(R5_UPTODATE, &sh->dev[i].flags);
                 atomic_inc(&rdev->read_errors);
-                if (conf->mddev->degraded)
+                if (conf->mddev->degraded >= conf->max_degraded)
                         printk_rl(KERN_WARNING
                                   "raid5:%s: read error not correctable "
                                   "(sector %llu on %s).\n",