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scsi: provide a generic change_queue_type method

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Most drivers use exactly the same implementation, so provide it as a
library function.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
This commit is contained in:
Christoph Hellwig
2014-10-02 14:39:55 +02:00
parent 1d5203284d
commit a62182f338
19 changed files with 42 additions and 228 deletions
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17
drivers/target/loopback/tcm_loop.c
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@@ -135,21 +135,6 @@ static int tcm_loop_change_queue_depth(
return sdev->queue_depth;
}
static int tcm_loop_change_queue_type(struct scsi_device *sdev, int tag)
{
if (sdev->tagged_supported) {
scsi_set_tag_type(sdev, tag);
if (tag)
scsi_activate_tcq(sdev, sdev->queue_depth);
else
scsi_deactivate_tcq(sdev, sdev->queue_depth);
} else
tag = 0;
return tag;
}
/*
* Locate the SAM Task Attr from struct scsi_cmnd *
*/
@@ -451,7 +436,7 @@ static struct scsi_host_template tcm_loop_driver_template = {
.name = "TCM_Loopback",
.queuecommand = tcm_loop_queuecommand,
.change_queue_depth = tcm_loop_change_queue_depth,
.change_queue_type = tcm_loop_change_queue_type,
.change_queue_type = scsi_change_queue_type,
.eh_abort_handler = tcm_loop_abort_task,
.eh_device_reset_handler = tcm_loop_device_reset,
.eh_target_reset_handler = tcm_loop_target_reset,