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/message/fusion/mptscsih.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'drivers/message/fusion/mptscsih.c') diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c index f68ec48a881e..57752751712b 100644 --- a/drivers/message/fusion/mptscsih.c +++ b/drivers/message/fusion/mptscsih.c @@ -2351,11 +2351,12 @@ mptscsih_slave_destroy(struct scsi_device *sdev) * mptscsih_change_queue_depth - This function will set a devices queue depth * @sdev: per scsi_device pointer * @qdepth: requested queue depth + * @reason: calling context * * Adding support for new 'change_queue_depth' api. */ int -mptscsih_change_queue_depth(struct scsi_device *sdev, int qdepth) +mptscsih_change_queue_depth(struct scsi_device *sdev, int qdepth, int reason) { MPT_SCSI_HOST *hd = shost_priv(sdev->host); VirtTarget *vtarget; @@ -2367,6 +2368,9 @@ mptscsih_change_queue_depth(struct scsi_device *sdev, int qdepth) starget = scsi_target(sdev); vtarget = starget->hostdata; + if (reason != SCSI_QDEPTH_DEFAULT) + return -EOPNOTSUPP; + if (ioc->bus_type == SPI) { if (!(vtarget->tflags & MPT_TARGET_FLAGS_Q_YES)) max_depth = 1; @@ -2433,7 +2437,8 @@ mptscsih_slave_configure(struct scsi_device *sdev) ioc->name, vtarget->negoFlags, vtarget->maxOffset, vtarget->minSyncFactor)); - mptscsih_change_queue_depth(sdev, MPT_SCSI_CMD_PER_DEV_HIGH); + mptscsih_change_queue_depth(sdev, MPT_SCSI_CMD_PER_DEV_HIGH, + SCSI_QDEPTH_DEFAULT); dsprintk(ioc, printk(MYIOC_s_DEBUG_FMT "tagged %d, simple %d, ordered %d\n", ioc->name,sdev->tagged_supported, sdev->simple_tags, -- cgit v1.2.3