It turns out ASUS M2A-VM isn't the only one with the 32bit DMA problem. Make ahci_asus_m2a_vm_32bit_only() more generic using the new dmi_get_date() and rename it to ahci_sb600_32bit_only(). Cut off date is now pointed to by dmi_system_id->driver_data in "yyyymmdd" format and it's now also allowed to be omitted. Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> Cc: Sandor Bodo-Merle <sbodomerle@xxxxxxxxx> Cc: Shane Huang <shane.huang@xxxxxxx> --- drivers/ata/ahci.c | 55 ++++++++++++++++++++++++++++------------------------- 1 file changed, 30 insertions(+), 25 deletions(-) Index: ata/drivers/ata/ahci.c =================================================================== --- ata.orig/drivers/ata/ahci.c +++ ata/drivers/ata/ahci.c @@ -2603,14 +2603,18 @@ static void ahci_p5wdh_workaround(struct } /* - * SB600 ahci controller on ASUS M2A-VM can't do 64bit DMA with older - * BIOS. The oldest version known to be broken is 0901 and working is - * 1501 which was released on 2007-10-26. Force 32bit DMA on anything - * older than 1501. Please read bko#9412 for more info. + * SB600 ahci controller on certain boards can't do 64bit DMA with + * older BIOS. */ -static bool ahci_asus_m2a_vm_32bit_only(struct pci_dev *pdev) +static bool ahci_sb600_32bit_only(struct pci_dev *pdev) { static const struct dmi_system_id sysids[] = { + /* + * The oldest version known to be broken is 0901 and + * working is 1501 which was released on 2007-10-26. + * Force 32bit DMA on anything older than 1501. + * Please read bko#9412 for more info. + */ { .ident = "ASUS M2A-VM", .matches = { @@ -2618,31 +2622,32 @@ static bool ahci_asus_m2a_vm_32bit_only( "ASUSTeK Computer INC."), DMI_MATCH(DMI_BOARD_NAME, "M2A-VM"), }, + .driver_data = "20071026", /* yyyymmdd */ }, { } }; - const char *cutoff_mmdd = "10/26"; - const char *date; - int year; + const struct dmi_system_id *match; + match = dmi_first_match(sysids); if (pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(0x12, 0) || - !dmi_check_system(sysids)) - return false; - - /* - * Argh.... both version and date are free form strings. - * Let's hope they're using the same date format across - * different versions. - */ - date = dmi_get_system_info(DMI_BIOS_DATE); - dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL); - if (date && strlen(date) >= 10 && date[2] == '/' && date[5] == '/' && - (year > 2007 || - (year == 2007 && strncmp(date, cutoff_mmdd, 5) >= 0))) + !match) return false; - dev_printk(KERN_WARNING, &pdev->dev, "ASUS M2A-VM: BIOS too old, " - "forcing 32bit DMA, update BIOS\n"); + if (match->driver_data) { + int year, month, date; + char buf[9]; + + dmi_get_date(DMI_BIOS_DATE, &year, &month, &date); + snprintf(buf, sizeof(buf), "%04d%02d%02d", year, month, date); + + if (strcmp(buf, match->driver_data) >= 0) + return false; + + dev_printk(KERN_WARNING, &pdev->dev, "%s: BIOS too old, " + "forcing 32bit DMA, update BIOS\n", match->ident); + } else + dev_printk(KERN_WARNING, &pdev->dev, "%s: this board can't " + "do 64bit DMA, forcing 32bit\n", match->ident); return true; } @@ -2857,8 +2862,8 @@ static int ahci_init_one(struct pci_dev if (board_id == board_ahci_sb700 && pdev->revision >= 0x40) hpriv->flags &= ~AHCI_HFLAG_IGN_SERR_INTERNAL; - /* apply ASUS M2A_VM quirk */ - if (ahci_asus_m2a_vm_32bit_only(pdev)) + /* apply sb600 32bit only quirk */ + if (ahci_sb600_32bit_only(pdev)) hpriv->flags |= AHCI_HFLAG_32BIT_ONLY; if (!(hpriv->flags & AHCI_HFLAG_NO_MSI)) -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html