aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi
diff options
context:
space:
mode:
authorTejun Heo <htejun@gmail.com>2006-06-21 23:12:48 +0900
committerJeff Garzik <jeff@garzik.org>2006-06-22 23:22:39 -0400
commit71f0737b2889b86f774a94afaf1342c2c0d61cb5 (patch)
treee983d3f4c3fccad0679aa8ae18a0c3ce91bfafe7 /drivers/scsi
parent8fa29b23d9e0ef976dc578aab98297d4f24f70da (diff)
[PATCH] ahci: disable NCQ support on vt8251
vt8251 chokes on NCQ commands. Two different disks from different vendors are showing the same symptom and it seems that the windows driver from via doesn't support NCQ either. Disable NCQ support on this controller for the time being. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: Aalderd Bouwman <boac@wanadoo.nl> Cc: Bastiaan Jacques <b.jacques@planet.nl> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/ahci.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index df779ba8749..4bb77f62b3b 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -164,6 +164,7 @@ enum {
/* ap->flags bits */
AHCI_FLAG_RESET_NEEDS_CLO = (1 << 24),
+ AHCI_FLAG_NO_NCQ = (1 << 25),
};
struct ahci_cmd_hdr {
@@ -277,7 +278,7 @@ static const struct ata_port_info ahci_port_info[] = {
.host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
ATA_FLAG_SKIP_D2H_BSY |
- AHCI_FLAG_RESET_NEEDS_CLO,
+ AHCI_FLAG_RESET_NEEDS_CLO | AHCI_FLAG_NO_NCQ,
.pio_mask = 0x1f, /* pio0-4 */
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &ahci_ops,
@@ -1386,7 +1387,8 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
if (rc)
goto err_out_hpriv;
- if (hpriv->cap & HOST_CAP_NCQ)
+ if (!(probe_ent->host_flags & AHCI_FLAG_NO_NCQ) &&
+ (hpriv->cap & HOST_CAP_NCQ))
probe_ent->host_flags |= ATA_FLAG_NCQ;
ahci_print_info(probe_ent);