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| author | Mike Christie <michaelc@cs.wisc.edu> | 2009-10-15 17:46:39 -0700 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-04 12:00:41 -0600 |
| commit | e881a172dac4d9ea3b2a1540041d872963c269bd (patch) | |
| tree | 9eb1f344b107806c0041c4e0a64192a055117289 /drivers/scsi/3w-xxxx.c | |
| parent | dbf9bfe615717d1145f263c0049fe2328e6ed395 (diff) | |
| download | linux-e881a172dac4d9ea3b2a1540041d872963c269bd.tar.gz linux-e881a172dac4d9ea3b2a1540041d872963c269bd.tar.bz2 linux-e881a172dac4d9ea3b2a1540041d872963c269bd.zip | |
[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 <michaelc@cs.wisc.edu>
[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 <vasu.dev@intel.com>
[jejb: fixed up 53c700]
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/3w-xxxx.c')
| -rw-r--r-- | drivers/scsi/3w-xxxx.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c index faa0fcfed71e..d224294c38fb 100644 --- a/drivers/scsi/3w-xxxx.c +++ b/drivers/scsi/3w-xxxx.c @@ -521,8 +521,12 @@ static ssize_t tw_show_stats(struct device *dev, struct device_attribute *attr, } /* End tw_show_stats() */ /* This function will set a devices queue depth */ -static int tw_change_queue_depth(struct scsi_device *sdev, int queue_depth) +static int tw_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); |