linux-kernel - [PATCH] scsi: megaraid_sas: make module parameter scmd

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Message-ID: <20240301070422.1739020-1-lei.chen@smartx.com>
Date: Fri,  1 Mar 2024 02:04:21 -0500
From: Lei Chen <lei.chen@...rtx.com>
To: Kashyap Desai <kashyap.desai@...adcom.com>,
	Sumit Saxena <sumit.saxena@...adcom.com>,
	Shivasharan S <shivasharan.srikanteshwara@...adcom.com>,
	Chandrakanth patil <chandrakanth.patil@...adcom.com>,
	"James E.J. Bottomley" <jejb@...ux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc: Lei Chen <lei.chen@...rtx.com>,
	megaraidlinux.pdl@...adcom.com,
	linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] scsi: megaraid_sas: make module parameter scmd_timeout writable

When an scmd times out, block layer calls megasas_reset_timer to
make further decisions. scmd_timeout indicates when an scmd is really
timed-out. If we want to make this process more fast, we can decrease
this value. This patch allows users to change this value in run-time.

Signed-off-by: Lei Chen <lei.chen@...rtx.com>
---
 drivers/scsi/megaraid/megaraid_sas_base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 3d4f13da1ae8..2a165e5dc7a3 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -91,7 +91,7 @@ module_param(dual_qdepth_disable, int, 0444);
 MODULE_PARM_DESC(dual_qdepth_disable, "Disable dual queue depth feature. Default: 0");
 
 static unsigned int scmd_timeout = MEGASAS_DEFAULT_CMD_TIMEOUT;
-module_param(scmd_timeout, int, 0444);
+module_param(scmd_timeout, int, 0644);
 MODULE_PARM_DESC(scmd_timeout, "scsi command timeout (10-90s), default 90s. See megasas_reset_timer.");
 
 int perf_mode = -1;
-- 
2.43.0