This is a note to let you know that I've just added the patch titled
scsi: set REQ_QUEUE for the blk-mq case
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-set-req_queue-for-the-blk-mq-case.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b1dd2aac4cc0892b82ec60232ed37e3b0af776cc Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@xxxxxx>
Date: Sun, 19 Oct 2014 17:13:58 +0200
Subject: scsi: set REQ_QUEUE for the blk-mq case
From: Christoph Hellwig <hch@xxxxxx>
commit b1dd2aac4cc0892b82ec60232ed37e3b0af776cc upstream.
To generate the right SPI tag messages we need to properly set
QUEUE_FLAG_QUEUED in the request_queue and mirror it to the
request.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Acked-by: Jens Axboe <axboe@xxxxxxxxx>
Reported-by: Meelis Roos <mroos@xxxxxxxx>
Tested-by: Meelis Roos <mroos@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/scsi_lib.c | 5 +++++
include/scsi/scsi_tcq.h | 8 ++++----
2 files changed, 9 insertions(+), 4 deletions(-)
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1887,6 +1887,11 @@ static int scsi_queue_rq(struct blk_mq_h
req->cmd_flags |= REQ_DONTPREP;
}
+ if (blk_queue_tagged(q))
+ req->cmd_flags |= REQ_QUEUED;
+ else
+ req->cmd_flags &= ~REQ_QUEUED;
+
scsi_init_cmd_errh(cmd);
cmd->scsi_done = scsi_mq_done;
--- a/include/scsi/scsi_tcq.h
+++ b/include/scsi/scsi_tcq.h
@@ -67,8 +67,9 @@ static inline void scsi_activate_tcq(str
if (!sdev->tagged_supported)
return;
- if (!shost_use_blk_mq(sdev->host) &&
- !blk_queue_tagged(sdev->request_queue))
+ if (shost_use_blk_mq(sdev->host))
+ queue_flag_set_unlocked(QUEUE_FLAG_QUEUED, sdev->request_queue);
+ else if (!blk_queue_tagged(sdev->request_queue))
blk_queue_init_tags(sdev->request_queue, depth,
sdev->host->bqt);
@@ -81,8 +82,7 @@ static inline void scsi_activate_tcq(str
**/
static inline void scsi_deactivate_tcq(struct scsi_device *sdev, int depth)
{
- if (!shost_use_blk_mq(sdev->host) &&
- blk_queue_tagged(sdev->request_queue))
+ if (blk_queue_tagged(sdev->request_queue))
blk_queue_free_tags(sdev->request_queue);
scsi_adjust_queue_depth(sdev, 0, depth);
}
Patches currently in stable-queue which might be from hch@xxxxxx are
queue-3.17/fs-fix-theoretical-division-by-0-in-super_cache_scan.patch
queue-3.17/scsi-set-req_queue-for-the-blk-mq-case.patch
queue-3.17/revert-block-all-blk-mq-requests-are-tagged.patch
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