libata-acpi: implement ata_acpi_associate()
* Add acpi_handle to ata_host and ata_port. Rename
ata_device->obj_handle to ->acpi_handle and move it above such that
it doesn't get cleared on reconfiguration.
* Replace ACPI node association which ata_acpi_associate() which is
called once during host initialization. Unlike the previous
implementation, ata_acpi_associate() uses ATA_FLAG_ACPI_SATA to
choose between IDE or SATA ACPI hierarchy and uses simple child look
up instead of recursive walk to match the nodes. This is way safer
and simpler. Please read the following message for more info.
http://article.gmane.org/gmane.linux.ide/17554
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 620da7b..d758168 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -363,6 +363,9 @@
void *private_data;
const struct ata_port_operations *ops;
unsigned long flags;
+#ifdef CONFIG_ATA_ACPI
+ acpi_handle acpi_handle;
+#endif
struct ata_port *simplex_claimed; /* channel owning the DMA */
struct ata_port *ports[0];
};
@@ -429,6 +432,9 @@
unsigned int devno; /* 0 or 1 */
unsigned long flags; /* ATA_DFLAG_xxx */
struct scsi_device *sdev; /* attached SCSI device */
+#ifdef CONFIG_ATA_ACPI
+ acpi_handle acpi_handle;
+#endif
/* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
u64 n_sectors; /* size of device, if ATA */
unsigned int class; /* ATA_DEV_xxx */
@@ -457,10 +463,6 @@
struct ata_ering ering;
int spdn_cnt;
unsigned int horkage; /* List of broken features */
-#ifdef CONFIG_ATA_ACPI
- /* ACPI objects info */
- acpi_handle obj_handle;
-#endif
};
/* Offset into struct ata_device. Fields above it are maintained
@@ -549,6 +551,9 @@
void *private_data;
+#ifdef CONFIG_ATA_ACPI
+ acpi_handle acpi_handle;
+#endif
u8 sector_buf[ATA_SECT_SIZE]; /* owned by EH */
};