diff options
Diffstat (limited to 'drivers/ata/ahci.c')
| -rw-r--r-- | drivers/ata/ahci.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index fd27227771b4..efd87d34d584 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -170,6 +170,7 @@ enum { AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */ AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */ AHCI_FLAG_IGN_SERR_INTERNAL = (1 << 27), /* ignore SERR_INTERNAL */ + AHCI_FLAG_32BIT_ONLY = (1 << 28), /* force 32bit */ }; struct ahci_cmd_hdr { @@ -370,7 +371,8 @@ static const struct ata_port_info ahci_port_info[] = { .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_SKIP_D2H_BSY | - AHCI_FLAG_IGN_SERR_INTERNAL, + AHCI_FLAG_IGN_SERR_INTERNAL | + AHCI_FLAG_32BIT_ONLY, .pio_mask = 0x1f, /* pio0-4 */ .udma_mask = 0x7f, /* udma0-6 ; FIXME */ .port_ops = &ahci_ops, @@ -1579,6 +1581,12 @@ static int ahci_host_init(struct ata_probe_ent *probe_ent) probe_ent->n_ports = cap_n_ports; using_dac = hpriv->cap & HOST_CAP_64; + if (using_dac && (probe_ent->port_flags & AHCI_FLAG_32BIT_ONLY)) { + dev_printk(KERN_INFO, &pdev->dev, + "controller can't do 64bit DMA, forcing 32bit\n"); + using_dac = 0; + } + if (using_dac && !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) { rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); |