From: Michael Kelley (EOSG) <Michael.H.Kelley@microsoft.com>
Date: Wed, 24 Jan 2018 22:49:57 +0000 (+0000)
Subject: scsi: storvsc: Increase cmd_per_lun for higher speed devices
X-Git-Tag: v4.19~1382^2~32
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cabe92a55e3a12005a4ac4d3954c9a174b0efe2a;p=platform%2Fkernel%2Flinux-rpi3.git

scsi: storvsc: Increase cmd_per_lun for higher speed devices

Increase cmd_per_lun to allow more I/Os in progress per device,
particularly for NVMe's.  The Hyper-V host side can handle the higher
count with no issues.

Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index e07907d..8eadb30 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1656,7 +1656,7 @@ static struct scsi_host_template scsi_driver = {
 	.eh_timed_out =		storvsc_eh_timed_out,
 	.slave_alloc =		storvsc_device_alloc,
 	.slave_configure =	storvsc_device_configure,
-	.cmd_per_lun =		255,
+	.cmd_per_lun =		2048,
 	.this_id =		-1,
 	.use_clustering =	ENABLE_CLUSTERING,
 	/* Make sure we dont get a sg segment crosses a page boundary */