From 71ef51cc1756d1c56b57c70e7cc27a3559c81ee6 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@suse.de>
Date: Fri, 28 Jul 2006 09:02:17 +0200
Subject: [PATCH] [PATCH] it821x: fix ide dma setup bug
Only enable dma for a valid speed setting.
Signed-off-by: Jens Axboe <axboe@suse.de>
---
drivers/ide/pci/it821x.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/ide/pci/it821x.c b/drivers/ide/pci/it821x.c
index 3cb04424d351..e9bad185968a 100644
--- a/drivers/ide/pci/it821x.c
+++ b/drivers/ide/pci/it821x.c
@@ -498,9 +498,14 @@ static int config_chipset_for_dma (ide_drive_t *drive)
{
u8 speed = ide_dma_speed(drive, it821x_ratemask(drive));
- config_it821x_chipset_for_pio(drive, !speed);
- it821x_tune_chipset(drive, speed);
- return ide_dma_enable(drive);
+ if (speed) {
+ config_it821x_chipset_for_pio(drive, 0);
+ it821x_tune_chipset(drive, speed);
+
+ return ide_dma_enable(drive);
+ }
+
+ return 0;
}
/**
--
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