From: Branden Bonaby <brandonbonaby94@gmail.com>
Date: Fri, 14 Jun 2019 19:48:22 -0400
Patch-mainline: v5.3-rc1
References: fate#321895
Subject: scsi: storvsc: Add ability to change scsi queue depth
Git-commit: adfbd028e155fca3bbe33d458f2f27cb657e5792
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>
Acked-by: Olaf Hering <ohering@suse.de>
---
drivers/scsi/storvsc_drv.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
--- 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);