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>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 4ddcae8b8c9..f11b87e18aa 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;
 }