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| author | Mike Christie <michaelc@cs.wisc.edu> | 2009-10-16 04:46:39 +0400 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2009-12-04 21:00:41 +0300 |
| commit | e881a172dac4d9ea3b2a1540041d872963c269bd (patch) | |
| tree | 9eb1f344b107806c0041c4e0a64192a055117289 /drivers/ata/libata-scsi.c | |
| parent | dbf9bfe615717d1145f263c0049fe2328e6ed395 (diff) | |
| download | linux-e881a172dac4d9ea3b2a1540041d872963c269bd.tar.xz | |
[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/ata/libata-scsi.c')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index b4ee28dec521..5d52c2fcd076 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; |