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s390/scm_blk: fix deadlock for requests != REQ_TYPE_FS 

When we refuse a non REQ_TYPE_FS request in the build request function
we already hold the queue lock. Thus we must not call blk_end_request_all
but __blk_end_request_all.

Reported-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Fixes: de9587a ('s390/scm_blk: fix endless loop for requests != REQ_TYPE_FS')
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2016-03-22 19:00:55 +01:00 committed by Martin Schwidefsky
parent 6ddf37da05
commit b707c65ae7
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/block/scm_blk.c
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@ -303,7 +303,7 @@ static void scm_blk_request(struct request_queue *rq)
if (req->cmd_type != REQ_TYPE_FS) {
blk_start_request(req);
blk_dump_rq_flags(req, KMSG_COMPONENT " bad request");
blk_end_request_all(req, -EIO);
__blk_end_request_all(req, -EIO);
continue;
}