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authorBranden Bonaby <brandonbonaby94@gmail.com>2019-06-15 02:48:22 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2019-06-20 22:37:02 +0300
commitadfbd028e155fca3bbe33d458f2f27cb657e5792 (patch)
treec06c6027e7a5a2d49195d7b9218659277b236be8 /drivers/scsi/storvsc_drv.c
parent6ea3b189f7704f0881815b414a20f36a2529030c (diff)
downloadlinux-adfbd028e155fca3bbe33d458f2f27cb657e5792.tar.xz
scsi: storvsc: Add ability to change scsi queue depth
Adding functionality to allow the SCSI queue depth to be changed by utilizing the "scsi_change_queue_depth" function. [mkp: checkpatch] Signed-off-by: Branden Bonaby <brandonbonaby94@gmail.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/storvsc_drv.c')
-rw-r--r--drivers/scsi/storvsc_drv.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 8472de1007ff..5b6c0f88da59 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -387,6 +387,7 @@ enum storvsc_request_type {
static int storvsc_ringbuffer_size = (128 * 1024);
static u32 max_outstanding_req_per_channel;
+static int storvsc_change_queue_depth(struct scsi_device *sdev, int queue_depth);
static int storvsc_vcpus_per_sub_channel = 4;
@@ -1711,6 +1712,7 @@ static struct scsi_host_template scsi_driver = {
.dma_boundary = PAGE_SIZE-1,
.no_write_same = 1,
.track_queue_depth = 1,
+ .change_queue_depth = storvsc_change_queue_depth,
};
enum {
@@ -1917,6 +1919,15 @@ err_out0:
return ret;
}
+/* Change a scsi target's queue depth */
+static int storvsc_change_queue_depth(struct scsi_device *sdev, int queue_depth)
+{
+ if (queue_depth > scsi_driver.can_queue)
+ queue_depth = scsi_driver.can_queue;
+
+ return scsi_change_queue_depth(sdev, queue_depth);
+}
+
static int storvsc_remove(struct hv_device *dev)
{
struct storvsc_device *stor_device = hv_get_drvdata(dev);