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| author | Tejun Heo <htejun@gmail.com> | 2007-09-23 13:19:54 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:44 -0400 |
| commit | d0df8b5d0fb547a3351c2a4b1ded7f7cde5d713a (patch) | |
| tree | a2005ec3be6e493844b092edeca9306fbc70f4b8 /drivers/ata/libata-acpi.c | |
| parent | 633273a3ed1cf37ced90475b0f95cf81deab04f1 (diff) | |
| download | kernel_samsung_smdk4412-d0df8b5d0fb547a3351c2a4b1ded7f7cde5d713a.zip kernel_samsung_smdk4412-d0df8b5d0fb547a3351c2a4b1ded7f7cde5d713a.tar.gz kernel_samsung_smdk4412-d0df8b5d0fb547a3351c2a4b1ded7f7cde5d713a.tar.bz2 | |
libata-pmp: extend ACPI support to cover PMP
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>
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 dc9842e..a276c06 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) |