ahci: Gigabyte GA-MA69VM-S2 can't do 64bit DMA

Gigabyte GA-MA69VM-S2 can't do 64bit DMA either.  It's yet unknown
whether recent BIOS fixes the problem.  Blacklist regardless of BIOS
revisions for now.

Sandor Bodo-Merle reported and provided the initial patch for this
issue.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Sandor Bodo-Merle <sbodomerle@gmail.com>
Cc: Shane Huang <shane.huang@amd.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index aa03b49a9af2..a4e4cf141c03 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -2668,6 +2668,22 @@ static bool ahci_sb600_32bit_only(struct pci_dev *pdev)
                         },
                         .driver_data = "20071026",      /* yyyymmdd */
                 },
+                /*
+                 * It's yet unknown whether more recent BIOS fixes the
+                 * problem.  Blacklist the whole board for the time
+                 * being.  Please read the following thread for more
+                 * info.
+                 *
+                 * http://thread.gmane.org/gmane.linux.ide/42326
+                 */
+                {
+                        .ident = "Gigabyte GA-MA69VM-S2",
+                        .matches = {
+                                DMI_MATCH(DMI_BOARD_VENDOR,
+                                          "Gigabyte Technology Co., Ltd."),
+                                DMI_MATCH(DMI_BOARD_NAME, "GA-MA69VM-S2"),
+                        },
+                },
                 { }
         };
         const struct dmi_system_id *match;