diff options
Diffstat (limited to 'drivers/ata/libata-acpi.c')
| -rw-r--r-- | drivers/ata/libata-acpi.c | 36 |
1 files changed, 32 insertions, 4 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index dc9842ec6f0..a276c06dda9 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -40,12 +40,40 @@ static int is_pci_dev(struct device *dev) return (dev->bus == &pci_bus_type); } -static void ata_acpi_associate_sata_port(struct ata_port *ap) +/** + * ata_acpi_associate_sata_port - associate SATA port with ACPI objects + * @ap: target SATA port + * + * Look up ACPI objects associated with @ap and initialize acpi_handle + * fields of @ap, the port and devices accordingly. + * + * LOCKING: + * EH context. + * + * RETURNS: + * 0 on success, -errno on failure. + */ +void ata_acpi_associate_sata_port(struct ata_port *ap) { - acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); + WARN_ON(!(ap->flags & ATA_FLAG_ACPI_SATA)); + + if (!ap->nr_pmp_links) { + acpi_integer adr = SATA_ADR(ap->port_no, NO_PORT_MULT); + + ap->link.device->acpi_handle = + acpi_get_child(ap->host->acpi_handle, adr); + } else { + struct ata_link *link; + + ap->link.device->acpi_handle = NULL; - ap->link.device->acpi_handle = - acpi_get_child(ap->host->acpi_handle, adr); + ata_port_for_each_link(link, ap) { + acpi_integer adr = SATA_ADR(ap->port_no, link->pmp); + + link->device->acpi_handle = + acpi_get_child(ap->host->acpi_handle, adr); + } + } } static void ata_acpi_associate_ide_port(struct ata_port *ap) |