ahci: sis can't do PMP

From: Piter PUNK <piterpunk@slackware.com>

SiS AHCIs say they can do PMP but can't and fail detection if SRST w/
pmp==15 is used.  Turn off PMP support.

tj: added patch description, adapted patch to #upstream-fixes and
    renamed board_ahci_sis to board_ahci_nopmp.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 29f34d03bd75bd207c169d58e6d846954f3b7947..6a4a2a25d97a6bd258f1fee4c7cad287d7ef8c0d 100644 (file)
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -90,6 +90,7 @@ enum {
        board_ahci_mv           = 4,
        board_ahci_sb700        = 5,
        board_ahci_mcp65        = 6,
+       board_ahci_nopmp        = 7,
 
        /* global controller registers */
        HOST_CAP                = 0x00, /* host capabilities */
@@ -401,6 +402,14 @@ static const struct ata_port_info ahci_port_info[] = {
                .udma_mask      = ATA_UDMA6,
                .port_ops       = &ahci_ops,
        },
+       /* board_ahci_nopmp */
+       {
+               AHCI_HFLAGS     (AHCI_HFLAG_NO_PMP),
+               .flags          = AHCI_FLAG_COMMON,
+               .pio_mask       = 0x1f, /* pio0-4 */
+               .udma_mask      = ATA_UDMA6,
+               .port_ops       = &ahci_ops,
+       },
 };
 
 static const struct pci_device_id ahci_pci_tbl[] = {
@@ -525,9 +534,9 @@ static const struct pci_device_id ahci_pci_tbl[] = {
        { PCI_VDEVICE(NVIDIA, 0x0bc7), board_ahci },            /* MCP7B */
 
        /* SiS */
-       { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
-       { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
-       { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
+       { PCI_VDEVICE(SI, 0x1184), board_ahci_nopmp },          /* SiS 966 */
+       { PCI_VDEVICE(SI, 0x1185), board_ahci_nopmp },          /* SiS 968 */
+       { PCI_VDEVICE(SI, 0x0186), board_ahci_nopmp },          /* SiS 968 */
 
        /* Marvell */
        { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv },        /* 6145 */