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authorTejun Heo <htejun@gmail.com>2007-09-23 13:19:54 +0900
committerJeff Garzik <jeff@garzik.org>2007-10-12 14:55:44 -0400
commitd0df8b5d0fb547a3351c2a4b1ded7f7cde5d713a (patch)
treea2005ec3be6e493844b092edeca9306fbc70f4b8 /drivers/ata/libata-acpi.c
parent633273a3ed1cf37ced90475b0f95cf81deab04f1 (diff)
downloadtalos-op-linux-d0df8b5d0fb547a3351c2a4b1ded7f7cde5d713a.tar.gz
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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.c36
1 files changed, 32 insertions, 4 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index dc9842ec6f06..a276c06dda95 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)
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