From: Tony Battersby <tonyb@cybernetics.com>
Date: Tue, 16 Oct 2007 20:29:52 +0000 (+0200)
Subject: ide: fix serverworks.c UDMA regression
X-Git-Tag: v2.6.24-rc1~822^2~32
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c824b51b338c808de650b440ba5f9f4a725f7fc;p=linux-2.6

ide: fix serverworks.c UDMA regression

The patch described by the following excerpt from ChangeLog-2.6.22 makes
it impossible to use UDMA on a Tyan S2707 motherboard (SvrWks CSB5):

commit 2d5eaa6dd744a641e75503232a01f52d0768884c
Author: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date:   Thu May 10 00:01:08 2007 +0200

    ide: rework the code for selecting the best DMA transfer mode (v3)

    ...

This one-line patch against 2.6.23 fixes the problem.

Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---

diff --git a/drivers/ide/pci/serverworks.c b/drivers/ide/pci/serverworks.c
index 49ec0ac64a..40b0383675 100644
--- a/drivers/ide/pci/serverworks.c
+++ b/drivers/ide/pci/serverworks.c
@@ -97,6 +97,7 @@ static u8 svwks_udma_filter(ide_drive_t *drive)
 			mode = 2;
 
 		switch(mode) {
+		case 3:	 mask = 0x3f; break;
 		case 2:	 mask = 0x1f; break;
 		case 1:	 mask = 0x07; break;
 		default: mask = 0x00; break;