ide: fix serverworks.c UDMA regression

patch 0c824b51b338c808de650b440ba5f9f4a725f7fc in mainline.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/ide/pci/serverworks.c b/drivers/ide/pci/serverworks.c
index 9fead2e7d4c88363a993d510aaa16225bbd917ef..e8870583e41ada1b1189bbaeb1e252645f79159c 100644 (file)
--- 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;