diff options
author | James Bottomley <JBottomley@Parallels.com> | 2014-12-08 07:42:02 -0800 |
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committer | James Bottomley <JBottomley@Parallels.com> | 2014-12-08 07:42:25 -0800 |
commit | 096cbc35eaecf5865a3274f21eae26955b32861b (patch) | |
tree | 8c6f085fd648939bfbc6ae41cd3f0204e32c5e07 /drivers/scsi/scsi.c | |
parent | dc843ef00e79ef0466d4d66bb20beeccda92e003 (diff) | |
parent | 79855d178557cc3e3ffd179fd26a64cef48dfb30 (diff) | |
download | linux-096cbc35eaecf5865a3274f21eae26955b32861b.tar.bz2 |
Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus
Conflicts:
drivers/scsi/scsi_debug.c
Agreed and tested resolution to a merge problem between a fix in scsi_debug
and a driver update
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/scsi.c')
-rw-r--r-- | drivers/scsi/scsi.c | 41 |
1 files changed, 15 insertions, 26 deletions
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 2d9730432233..1ad0c36375b8 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -661,30 +661,18 @@ void scsi_finish_command(struct scsi_cmnd *cmd) } /** - * scsi_adjust_queue_depth - Let low level drivers change a device's queue depth + * scsi_change_queue_depth - change a device's queue depth * @sdev: SCSI Device in question - * @tags: Number of tags allowed if tagged queueing enabled, - * or number of commands the low level driver can - * queue up in non-tagged mode (as per cmd_per_lun). + * @depth: number of commands allowed to be queued to the driver * - * Returns: Nothing - * - * Lock Status: None held on entry - * - * Notes: Low level drivers may call this at any time and we will do - * the right thing depending on whether or not the device is - * currently active and whether or not it even has the - * command blocks built yet. + * Sets the device queue depth and returns the new value. */ -void scsi_adjust_queue_depth(struct scsi_device *sdev, int tags) +int scsi_change_queue_depth(struct scsi_device *sdev, int depth) { unsigned long flags; - /* - * refuse to set tagged depth to an unworkable size - */ - if (tags <= 0) - return; + if (depth <= 0) + goto out; spin_lock_irqsave(sdev->request_queue->queue_lock, flags); @@ -699,15 +687,17 @@ void scsi_adjust_queue_depth(struct scsi_device *sdev, int tags) */ if (!shost_use_blk_mq(sdev->host) && !sdev->host->bqt) { if (blk_queue_tagged(sdev->request_queue) && - blk_queue_resize_tags(sdev->request_queue, tags) != 0) - goto out; + blk_queue_resize_tags(sdev->request_queue, depth) != 0) + goto out_unlock; } - sdev->queue_depth = tags; - out: + sdev->queue_depth = depth; +out_unlock: spin_unlock_irqrestore(sdev->request_queue->queue_lock, flags); +out: + return sdev->queue_depth; } -EXPORT_SYMBOL(scsi_adjust_queue_depth); +EXPORT_SYMBOL(scsi_change_queue_depth); /** * scsi_track_queue_full - track QUEUE_FULL events to adjust queue depth @@ -752,12 +742,11 @@ int scsi_track_queue_full(struct scsi_device *sdev, int depth) if (sdev->last_queue_full_depth < 8) { /* Drop back to untagged */ scsi_set_tag_type(sdev, 0); - scsi_adjust_queue_depth(sdev, sdev->host->cmd_per_lun); + scsi_change_queue_depth(sdev, sdev->host->cmd_per_lun); return -1; } - scsi_adjust_queue_depth(sdev, depth); - return depth; + return scsi_change_queue_depth(sdev, depth); } EXPORT_SYMBOL(scsi_track_queue_full); |