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Revert "scsi: core: fix scsi_host_queue_ready"

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This reverts commit 265d59aacb.

There is fundamental issue in commit 328728630d (scsi: core: avoid
host-wide host_busy counter for scsi_mq) because SCSI's host busy counter
may not be same with counter of blk-mq's inflight tags, especially in case
of none io scheduler.

So revert this commit first.

Cc: Omar Sandoval <osandov@fb.com>,
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
Cc: James Bottomley <james.bottomley@hansenpartnership.com>,
Cc: Christoph Hellwig <hch@lst.de>,
Cc: Don Brace <don.brace@microsemi.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Jens Axboe <axboe@kernel.dk>
Reported-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ming Lei 2018-08-27 15:24:42 +08:00 committed by Martin K. Petersen
parent 4e8065aa6c
commit 23aa8e69f2
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/scsi_lib.c
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@ -1611,7 +1611,7 @@ static inline int scsi_host_queue_ready(struct request_queue *q,
else
busy = 0;
if (atomic_read(&shost->host_blocked) > 0) {
if (busy)
if (busy || scsi_host_busy(shost))
goto starved;
/*