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dm mpath: complain about unsupported __multipath_map_bio() return values

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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>
This commit is contained in:
Bart Van Assche 2017-08-09 11:32:14 -07:00 committed by Mike Snitzer
parent 7b06e09a6d
commit 9157c8d3e2
1 changed files with 4 additions and 0 deletions
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4
drivers/md/dm-mpath.c
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@ -632,6 +632,10 @@ static void process_queued_bios(struct work_struct *work)
case DM_MAPIO_REMAPPED: case DM_MAPIO_REMAPPED:
generic_make_request(bio); generic_make_request(bio);
break; break;
case 0:
break;
default:
WARN_ONCE(true, "__multipath_map_bio() returned %d\n", r);
} }
} }
blk_finish_plug(&plug); blk_finish_plug(&plug);