From e881a172dac4d9ea3b2a1540041d872963c269bd Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Thu, 15 Oct 2009 17:46:39 -0700 Subject: [SCSI] modify change_queue_depth to take in reason why it is being called This patch modifies scsi_host_template->change_queue_depth so that it takes an argument indicating why it is being called. This will be used so that if a LLD needs to do some extra processing when handling queue fulls or later ramp ups, it can do so. This is a simple port of the drivers setting a change_queue_depth callback. In the patch I just have these LLDs adjust the queue depth if the user was requesting it. Signed-off-by: Mike Christie [Vasu.Dev: v2 Also converted pmcraid_change_queue_depth and then verified all modules compile using "make allmodconfig" for any new build warnings on X86_64. Updated original description after combing two original patches from Mike to make this patch git bisectable.] Signed-off-by: Vasu Dev [jejb: fixed up 53c700] Signed-off-by: James Bottomley --- drivers/ata/libata-scsi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/ata/libata-scsi.c') diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index b4ee28dec52..5d52c2fcd07 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1208,6 +1208,7 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev) * ata_scsi_change_queue_depth - SCSI callback for queue depth config * @sdev: SCSI device to configure queue depth for * @queue_depth: new queue depth + * @reason: calling context * * This is libata standard hostt->change_queue_depth callback. * SCSI will call into this callback when user tries to set queue @@ -1219,12 +1220,16 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev) * RETURNS: * Newly configured queue depth. */ -int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth) +int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth, + int reason) { struct ata_port *ap = ata_shost_to_port(sdev->host); struct ata_device *dev; unsigned long flags; + if (reason != SCSI_QDEPTH_DEFAULT) + return -EOPNOTSUPP; + if (queue_depth < 1 || queue_depth == sdev->queue_depth) return sdev->queue_depth; -- cgit v1.2.3