From: Bart Van Assche <bart.vanassche@wdc.com>
Date: Wed, 9 Aug 2017 11:32:14 -0700
Subject: [PATCH] dm mpath: complain about unsupported __multipath_map_bio()
Git-commit: 9157c8d3e2d318581ecc8bdf34367d57f19c5380
Patch-mainline: v4.14-rc1
References: bsc#1104967,FATE#325924
return values
WARN_ONCE() if __multipath_map_bio() returns an unsupported return value.
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>
Acked-by: Hannes Reinecke <hare@suse.com>
---
drivers/md/dm-mpath.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 97bca9464395..7406ededf875 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -632,6 +632,10 @@ static void process_queued_bios(struct work_struct *work)
case DM_MAPIO_REMAPPED:
generic_make_request(bio);
break;
+ case 0:
+ break;
+ default:
+ WARN_ONCE(true, "__multipath_map_bio() returned %d\n", r);
}
}
blk_finish_plug(&plug);
--
2.16.4