From 7d73a363dea186a864f6295bbe842da8044d42cd Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Thu, 26 Jul 2007 18:38:06 +0100
Subject: libata pata_via: ACPI checks for 80wire cable

Testing this on the VIA boards fixes several problems with otherwise
undetectable SATA bridge chips

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 4ddcae8..f11b87e 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -184,6 +184,9 @@ static int via_cable_detect(struct ata_port *ap) {
 	   two drives */
 	if (ata66 & (0x10100000 >> (16 * ap->port_no)))
 		return ATA_CBL_PATA80;
+	/* Check with ACPI so we can spot BIOS reported SATA bridges */
+	if (ata_acpi_cbl_80wire(ap))
+		return ATA_CBL_PATA80;
 	return ATA_CBL_PATA40;
 }
 
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