linux-kernel - [PATCH 7/8] [SCSI] mvsas: fixed SMP request watchdog timeout issue.

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Message-Id: <4e834cee.2679440a.6d74.79d6@mx.google.com>
Date:	Thu, 29 Sep 2011 00:35:15 -0700
From:	yxlraid@...il.com
To:	JBottomley@...allels.com
Cc:	jack_wang@...sh.com, lucas.demarchi@...fusion.mobi,
	maciej.trela@...el.com, dan.j.williams@...el.com,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Xiangliang Yu <yuxiangl@...vell.com>
Subject: [PATCH 7/8] [SCSI] mvsas: fixed SMP request watchdog timeout issue.

From: Xiangliang Yu <yuxiangl@...vell.com>

-- set SMP link timeout value to maximum.

Signed-off-by: Xiangliang Yu <yuxiangl@...vell.com>
---
 drivers/scsi/mvsas/mv_94xx.c |    4 ++++
 drivers/scsi/mvsas/mv_defs.h |    1 +
 2 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/mvsas/mv_94xx.c b/drivers/scsi/mvsas/mv_94xx.c
index ba667db..49088d5 100644
--- a/drivers/scsi/mvsas/mv_94xx.c
+++ b/drivers/scsi/mvsas/mv_94xx.c
@@ -511,6 +511,10 @@ static int __devinit mvs_94xx_init(struct mvs_info *mvi)
 	tmp |= CINT_PHY_MASK;
 	mw32(MVS_INT_MASK, tmp);
 
+	tmp = mvs_cr32(mvi, CMD_LINK_TIMER);
+	tmp |= 0xFFFF0000;
+	mvs_cw32(mvi, CMD_LINK_TIMER, tmp);
+
 	/* tune STP performance */
 	tmp = 0x003F003F;
 	mvs_cw32(mvi, CMD_PL_TIMER, tmp);
diff --git a/drivers/scsi/mvsas/mv_defs.h b/drivers/scsi/mvsas/mv_defs.h
index 8e21482..f545194 100644
--- a/drivers/scsi/mvsas/mv_defs.h
+++ b/drivers/scsi/mvsas/mv_defs.h
@@ -388,6 +388,7 @@ enum sas_cmd_port_registers {
 	CMD_SL_MODE1		= 0x1C0, /* SL Mode 1 */
 	CMD_PND_FIFO_CTL1	= 0x1C4, /* Pending FIFO Control 1 */
 	CMD_PORT_LAYER_TIMER1	= 0x1E0, /* Port Layer Timer 1 */
+	CMD_LINK_TIMER		= 0x1E4, /* Link Timer */
 };
 
 enum mvs_info_flags {
-- 
1.7.4.4

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