linux-kernel - [PATCH] sata-via: enable magic transmission fix for vt6420

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Date:	Sun, 14 Nov 2010 13:31:51 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Joseph Chan <JosephChan@....com.tw>
Subject: [PATCH] sata-via: enable magic transmission fix for vt6420

I was able to reproduce and test the transmission error on vt6420
hardware with the 2G WD drives. Adding the controller ID to this fix
seems to result in a properly working system.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
---
 drivers/ata/sata_via.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 4730c42..2822492 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -577,7 +577,7 @@ static void svia_configure(struct pci_dev *pdev)
 	}
 
 	/*
-	 * vt6421 has problems talking to some drives.  The following
+	 * vt642[01] has problems talking to some drives.  The following
 	 * is the fix from Joseph Chan <JosephChan@....com.tw>.
 	 *
 	 * When host issues HOLD, device may send up to 20DW of data
@@ -597,7 +597,7 @@ static void svia_configure(struct pci_dev *pdev)
 	 * https://bugzilla.kernel.org/show_bug.cgi?id=15173
 	 * http://article.gmane.org/gmane.linux.ide/46352
 	 */
-	if (pdev->device == 0x3249) {
+	if (pdev->device == 0x3249 || pdev->device == 0x3149) {
 		pci_read_config_byte(pdev, 0x52, &tmp8);
 		tmp8 |= 1 << 2;
 		pci_write_config_byte(pdev, 0x52, tmp8);

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