linux-kernel - [PATCH 3.8 03/81] ata: enable quirk from jmicron JMB350 for JMB394

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Message-Id: <1395767794-5012-4-git-send-email-kamal@canonical.com>
Date:	Tue, 25 Mar 2014 10:15:16 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	"Denis V. Lunev" <den@...nvz.org>, Tejun Heo <tj@...nel.org>,
	<linux-ide@...r.kernel.org>, Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.8 03/81] ata: enable quirk from jmicron JMB350 for JMB394

3.8.13.20 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Denis V. Lunev" <den@...nvz.org>

commit efb9e0f4f43780f0ae0c6428d66bd03e805c7539 upstream.

Without the patch the kernel generates the following error.

 ata11.15: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
 ata11.15: Port Multiplier vendor mismatch '0x197b' != '0x123'
 ata11.15: PMP revalidation failed (errno=-19)
 ata11.15: failed to recover PMP after 5 tries, giving up

This patch helps to bypass this error and the device becomes
functional.

Signed-off-by: Denis V. Lunev <den@...nvz.org>
Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: <linux-ide@...r.kernel.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/ata/libata-pmp.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index 20fd337..7ccc084 100644
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -447,8 +447,11 @@ static void sata_pmp_quirks(struct ata_port *ap)
 		 * otherwise.  Don't try hard to recover it.
 		 */
 		ap->pmp_link[ap->nr_pmp_links - 1].flags |= ATA_LFLAG_NO_RETRY;
-	} else if (vendor == 0x197b && devid == 0x2352) {
-		/* chip found in Thermaltake BlackX Duet, jmicron JMB350? */
+	} else if (vendor == 0x197b && (devid == 0x2352 || devid == 0x0325)) {
+		/*
+		 * 0x2352: found in Thermaltake BlackX Duet, jmicron JMB350?
+		 * 0x0325: jmicron JMB394.
+		 */
 		ata_for_each_link(link, ap, EDGE) {
 			/* SRST breaks detection and disks get misclassified
 			 * LPM disabled to avoid potential problems
-- 
1.8.3.2

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