From 0b7fd217374a617629dc760f70f6f031bd282ffc Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Tue, 27 Aug 2013 13:39:40 +0200
Subject: [PATCH] mpt2sas: add module parameter to disable watchdog

There are reports that the mpt2sas firmware is becoming
sluggish under heavy load, so the watchdog might trigger
accidentally.
This patch adds a module option 'disable_watchdog' to
disable the watchdog for these cases.

Signed-off-by: Hannes Reinecke <hare@suse.de>

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index ccd6d5a..9e47ca3 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -88,6 +88,10 @@ static int disable_discovery = -1;
 module_param(disable_discovery, int, 0);
 MODULE_PARM_DESC(disable_discovery, " disable discovery ");
 
+static int disable_watchdog;
+module_param(disable_watchdog, int, 0);
+MODULE_PARM_DESC(disable_watchdog, " disable watchdog ");
+
 /**
  * _scsih_set_fwfault_debug - global setting of ioc->fwfault_debug.
  *
@@ -237,7 +241,7 @@ mpt2sas_base_start_watchdog(struct MPT2SAS_ADAPTER *ioc)
 {
 	unsigned long	 flags;
 
-	if (ioc->fault_reset_work_q)
+	if (disable_watchdog || ioc->fault_reset_work_q)
 		return;
 
 	/* initialize fault polling */