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libata-pmp: extend ACPI support to cover PMP

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Extend ata_acpi_associate_sata_port() such that it can handle PMP and
call it when PMP is attached and detached.

Build breakage when !CONFIG_ATA_ACPI was spotted and fixed by Petr
Vandrovec.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo
2007-09-23 13:19:54 +09:00
committed by Jeff Garzik
parent 633273a3ed
commit d0df8b5d0f
3 changed files with 38 additions and 4 deletions
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36
drivers/ata/libata-acpi.c
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@ -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));
ap->link.device->acpi_handle =
acpi_get_child(ap->host->acpi_handle, adr);
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;
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)