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| author |   Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-29 09:04:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-29 09:04:47 -0700 |
| commit | 5a90fa71f6d45054c78b2bd6dbc4feba1638e1d2 (patch) | |
| tree | 2d6803ca2d8201500a203465d2afe54187ad0c52 /drivers/scsi | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 (diff) | |
| parent | libata: Check PCI sub-class code before disabling AHCI (diff) | |
| download | linux-dev-5a90fa71f6d45054c78b2bd6dbc4feba1638e1d2.tar.xz linux-dev-5a90fa71f6d45054c78b2bd6dbc4feba1638e1d2.zip | |
Merge head 'upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/ata_piix.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 3be546439252..a2cfade2c1c6 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -38,6 +38,7 @@ enum { PIIX_IOCFG = 0x54, /* IDE I/O configuration register */ ICH5_PMR = 0x90, /* port mapping register */ ICH5_PCS = 0x92, /* port control and status */ + PIIX_SCC = 0x0A, /* sub-class code register */ PIIX_FLAG_AHCI = (1 << 28), /* AHCI possible */ PIIX_FLAG_CHECKINTR = (1 << 29), /* make sure PCI INTx enabled */ @@ -62,6 +63,8 @@ enum { ich6_sata_rm = 4, ich7_sata = 5, esb2_sata = 6, + + PIIX_AHCI_DEVICE = 6, }; static int piix_init_one (struct pci_dev *pdev, @@ -574,11 +577,11 @@ static int piix_disable_ahci(struct pci_dev *pdev) addr = pci_resource_start(pdev, AHCI_PCI_BAR); if (!addr || !pci_resource_len(pdev, AHCI_PCI_BAR)) return 0; - + mmio = ioremap(addr, 64); if (!mmio) return -ENOMEM; - + tmp = readl(mmio + AHCI_GLOBAL_CTL); if (tmp & AHCI_ENABLE) { tmp &= ~AHCI_ENABLE; @@ -588,7 +591,7 @@ static int piix_disable_ahci(struct pci_dev *pdev) if (tmp & AHCI_ENABLE) rc = -EIO; } - + iounmap(mmio); return rc; } @@ -626,9 +629,13 @@ static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) port_info[1] = NULL; if (port_info[0]->host_flags & PIIX_FLAG_AHCI) { - int rc = piix_disable_ahci(pdev); - if (rc) - return rc; + u8 tmp; + pci_read_config_byte(pdev, PIIX_SCC, &tmp); + if (tmp == PIIX_AHCI_DEVICE) { + int rc = piix_disable_ahci(pdev); + if (rc) + return rc; + } } if (port_info[0]->host_flags & PIIX_FLAG_COMBINED) { |