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[SCSI] modify change_queue_depth to take in reason why it is being called

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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>
This commit is contained in:
Mike Christie
2009-10-15 17:46:39 -07:00
committed by James Bottomley
parent dbf9bfe615
commit e881a172da
27 changed files with 119 additions and 32 deletions
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6
drivers/scsi/libsas/sas_scsi_host.c
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@ -820,10 +820,14 @@ void sas_slave_destroy(struct scsi_device *scsi_dev)
ata_port_disable(dev->sata_dev.ap);
}
int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth)
int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth,
int reason)
{
int res = min(new_depth, SAS_MAX_QD);
if (reason != SCSI_QDEPTH_DEFAULT)
return -EOPNOTSUPP;
if (scsi_dev->tagged_supported)
scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev),
res);