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/scsi/3w-9xxx.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/3w-9xxx.c') diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c index 36c21b19e5d..2d16d49fd3c 100644 --- a/drivers/scsi/3w-9xxx.c +++ b/drivers/scsi/3w-9xxx.c @@ -186,8 +186,12 @@ static ssize_t twa_show_stats(struct device *dev, } /* End twa_show_stats() */ /* This function will set a devices queue depth */ -static int twa_change_queue_depth(struct scsi_device *sdev, int queue_depth) +static int twa_change_queue_depth(struct scsi_device *sdev, int queue_depth, + int reason) { + if (reason != SCSI_QDEPTH_DEFAULT) + return -EOPNOTSUPP; + if (queue_depth > TW_Q_LENGTH-2) queue_depth = TW_Q_LENGTH-2; scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth); -- cgit v1.2.3