libata pata_amd: ACPI checks for 80wire cable

We can make use of this on the pata_amd driver as many Nvidia devices
don't have reliable cable detect.

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_amd.c b/drivers/ata/pata_amd.c
index 46f829c838b3..c95922f8cc5e 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -270,6 +270,9 @@ static int nv_cable_detect(struct ata_port *ap)
         pci_read_config_word(pdev, 0x62 - 2 * ap->port_no, &udma);
         if ((udma & 0xC4) == 0xC4 || (udma & 0xC400) == 0xC400)
                 cbl = ATA_CBL_PATA80;
+        /* And a triple check across suspend/resume with ACPI around */
+        if (ata_acpi_cbl_80wire(ap))
+                cbl = ATA_CBL_PATA80;
         return cbl;
 }