From: Bart Van Assche <bart.vanassche@wdc.com>
Date: Wed, 9 Aug 2017 18:32:15 +0000 (-0700)
Subject: dm mpath: retry BLK_STS_RESOURCE errors
X-Git-Tag: v4.13~18^2~2
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=68515cc72191f5c5d86f6ef7091dc8ba714d96e4;p=linux.git

dm mpath: retry BLK_STS_RESOURCE errors

Retry requests instead of failing them if an out-of-memory error occurs
or the block driver below dm-mpath is busy.  This restores the v4.12
behavior of noretry_error(), namely that -ENOMEM results in a retry.

Fixes: 2a842acab109 ("block: introduce new block status code type")
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 0e8ab5bb3575..3486c829fa50 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1458,7 +1458,6 @@ static int noretry_error(blk_status_t error)
 	case BLK_STS_TARGET:
 	case BLK_STS_NEXUS:
 	case BLK_STS_MEDIUM:
-	case BLK_STS_RESOURCE:
 		return 1;
 	}