commit 1c54a93d4de34c87be9c63fe5094157e10995d6b
author Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Tue Oct 16 22:29:56 2007 +0200
committer Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Tue Oct 16 22:29:56 2007 +0200
tree 9da94f64f4d432ca222547f555c9c1bb10bf2e25
parent 3135469e1f679b1728fa047ed43b0c63cdf50c84

it8213/piix/slc90e66: "de-couple" PIO and UDMA modes

Don't force PIO4 when programming UDMA mode (suggested by Sergei).

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/pci/piix.c

diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index d5a31e9..b0f0616 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -1,5 +1,5 @@
 /*
- *  linux/drivers/ide/pci/piix.c	Version 0.52	Jul 14, 2007
+ *  linux/drivers/ide/pci/piix.c	Version 0.53	Aug 9, 2007
  *
  *  Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
  *  Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
@@ -194,7 +194,7 @@
 	int u_speed		= 0;
 	int			sitre;
 	u16			reg4042, reg4a;
-	u8			reg48, reg54, reg55, pio;
+	u8			reg48, reg54, reg55;
 
 	pci_read_config_word(dev, maslave, &reg4042);
 	sitre = (reg4042 & 0x4000) ? 1 : 0;
@@ -231,10 +231,9 @@
 				pci_write_config_byte(dev, 0x54, reg54 | v_flag);
 		} else
 			pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
-
-		pio = 4;
 	} else {
 		const u8 mwdma_to_pio[] = { 0, 3, 4 };
+		u8 pio;
 
 		if (reg48 & u_flag)
 			pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
@@ -249,9 +248,9 @@
 			pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
 		else
 			pio = 2; /* only SWDMA2 is allowed */
-	}
 
-	piix_set_pio_mode(drive, pio);
+		piix_set_pio_mode(drive, pio);
+	}
 }
 
 /**