[v2] support for PMP used in TT BlackX Duet drive dock

Submitted by Pavel Herrmann on April 28, 2011, 8:32 p.m.

Details

Message ID 201104282232.54770.morpheus.ibis@gmail.com
State Not Applicable
Delegated to: David Miller
Headers show

Commit Message

Pavel Herrmann April 28, 2011, 8:32 p.m.
Please note the comments have been changed to better explain the PMP behaviour

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From 558ac1479ef159dddad7ee2842f629ed2095ada9 Mon Sep 17 00:00:00 2001
From: Pavel Herrmann <morpheus.ibis@gmail.com>
Date: Thu, 7 Apr 2011 18:15:26 +0200
Subject: [PATCH] libata-pmp: add support for Thermaltake BlackX Duet esata
 drive dock

some errors still show up, but the dock works, both drives can be
accessed at the same time

the chip maker and designation is unknown - possibly jmicron JMB350?

Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
---
 drivers/ata/libata-pmp.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index 3120596..f06b7ea 100644
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -449,6 +449,16 @@  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? */
+		ata_for_each_link(link, ap, EDGE) {
+			/* SRST breaks detection and disks get misclassified
+			 * LPM disabled to avoid potential problems
+			 */
+			link->flags |= ATA_LFLAG_NO_LPM |
+				       ATA_LFLAG_NO_SRST |
+				       ATA_LFLAG_ASSUME_ATA;
+		}
 	}
 }
 
-- 
1.7.5.rc1