From: Jens Axboe <axboe@suse.de>
Date: Fri, 28 Jul 2006 07:02:17 +0000 (+0200)
Subject: [PATCH] it821x: fix ide dma setup bug
X-Git-Tag: v2.6.18-rc3~26^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=71ef51cc1756d1c56b57c70e7cc27a3559c81ee6;p=platform%2Fkernel%2Flinux-3.10.git

[PATCH] it821x: fix ide dma setup bug

Only enable dma for a valid speed setting.

Signed-off-by: Jens Axboe <axboe@suse.de>
---

diff --git a/drivers/ide/pci/it821x.c b/drivers/ide/pci/it821x.c
index 3cb0442..e9bad18 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;
 }
 
 /**