linux-kernel - Re: sata_via: write errors on PATA drive connected to VT6421

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Message-Id: <200709010055.22200.linux@rainbow-software.org>
Date:	Sat, 1 Sep 2007 00:55:21 +0200
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	jgarzik@...ox.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: sata_via: write errors on PATA drive connected to VT6421

Hello,
I think that I've found and fixed the problem. There is a copy/paste bug in 
vt6421_set_dma_mode() function which causes wrong values to be written to 
PATA_UDMA_TIMING register.


This patch fixes a copy/paste bug that breaks DMA modes on VT6421 PATA port.

Signed-off-by: Ondrej Zary <linux@...nbow-software.org>

--- linux-2.6.22.3-orig/drivers/ata/sata_via.c	2007-09-01 00:40:22.000000000 +0200
+++ linux-2.6.22.3-router2/drivers/ata/sata_via.c	2007-09-01 00:10:40.000000000 +0200
@@ -370,7 +370,7 @@
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	static const u8 udma_bits[] = { 0xEE, 0xE8, 0xE6, 0xE4, 0xE2, 0xE1, 0xE0, 0xE0 };
-	pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->pio_mode - XFER_UDMA_0]);
+	pci_write_config_byte(pdev, PATA_UDMA_TIMING, udma_bits[adev->dma_mode - XFER_UDMA_0]);
 }
 
 static const unsigned int svia_bar_sizes[] = {


-- 
Ondrej Zary
-
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