lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/scsi/ipr.c
View File

@ -3367,16 +3367,21 @@ static int ipr_free_dump(struct ipr_ioa_cfg *ioa_cfg) { return 0; };
* ipr_change_queue_depth - Change the device's queue depth
* @sdev: scsi device struct
* @qdepth: depth to set
* @reason: calling context
*
* Return value:
* actual depth set
**/
static int ipr_change_queue_depth(struct scsi_device *sdev, int qdepth)
static int ipr_change_queue_depth(struct scsi_device *sdev, int qdepth,
int reason)
{
struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)sdev->host->hostdata;
struct ipr_resource_entry *res;
unsigned long lock_flags = 0;
if (reason != SCSI_QDEPTH_DEFAULT)
return -EOPNOTSUPP;
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
res = (struct ipr_resource_entry *)sdev->hostdata;