Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=562f0c2d771ee7be6b37fe015f94a929f8056120
Commit:     562f0c2d771ee7be6b37fe015f94a929f8056120
Parent:     7f9ad9b8b96855f529f4fe9db0bf32cd3f14c01b
Author:     Tejun Heo <[EMAIL PROTECTED]>
AuthorDate: Sat Dec 15 15:05:01 2007 +0900
Committer:  Jeff Garzik <[EMAIL PROTECTED]>
CommitDate: Mon Dec 17 20:33:12 2007 -0500

    libata-acpi: add new hooks ata_acpi_dissociate() and ata_acpi_on_disable()
    
    Add two hooks - ata_acpi_dissociate() which is called during driver
    detach after the whole host is shutdown and ata_acpi_on_disable()
    which is called when a device is disabled.
    
    Signed-off-by: Tejun heo <[EMAIL PROTECTED]>
    Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
---
 drivers/ata/libata-acpi.c |   28 ++++++++++++++++++++++++++++
 drivers/ata/libata-core.c |    4 ++++
 drivers/ata/libata.h      |    8 ++++++--
 3 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 8ae36ad..9e5fc5d 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -188,6 +188,21 @@ void ata_acpi_associate(struct ata_host *host)
 }
 
 /**
+ * ata_acpi_dissociate - dissociate ATA host from ACPI objects
+ * @host: target ATA host
+ *
+ * This function is called during driver detach after the whole host
+ * is shut down.
+ *
+ * LOCKING:
+ * EH context.
+ */
+void ata_acpi_dissociate(struct ata_host *host)
+{
+       /* nada */
+}
+
+/**
  * ata_acpi_gtm - execute _GTM
  * @ap: target ATA port
  * @gtm: out parameter for _GTM result
@@ -716,3 +731,16 @@ int ata_acpi_on_devcfg(struct ata_device *dev)
        dev->flags |= ATA_DFLAG_ACPI_FAILED;
        return rc;
 }
+
+/**
+ * ata_acpi_on_disable - ATA ACPI hook called when a device is disabled
+ * @dev: target ATA device
+ *
+ * This function is called when @dev is about to be disabled.
+ *
+ * LOCKING:
+ * EH context.
+ */
+void ata_acpi_on_disable(struct ata_device *dev)
+{
+}
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c316eac..4af939a 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -622,6 +622,7 @@ void ata_dev_disable(struct ata_device *dev)
        if (ata_dev_enabled(dev)) {
                if (ata_msg_drv(dev->link->ap))
                        ata_dev_printk(dev, KERN_WARNING, "disabled\n");
+               ata_acpi_on_disable(dev);
                ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 |
                                             ATA_DNXFER_QUIET);
                dev->class++;
@@ -7249,6 +7250,9 @@ void ata_host_detach(struct ata_host *host)
 
        for (i = 0; i < host->n_ports; i++)
                ata_port_detach(host->ports[i]);
+
+       /* the host is dead now, dissociate ACPI */
+       ata_acpi_dissociate(host);
 }
 
 /**
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 0e6cf3a..bbe59c2 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -108,15 +108,19 @@ extern void ata_lpm_schedule(struct ata_port *ap, enum 
link_pm);
 #ifdef CONFIG_ATA_ACPI
 extern void ata_acpi_associate_sata_port(struct ata_port *ap);
 extern void ata_acpi_associate(struct ata_host *host);
+extern void ata_acpi_dissociate(struct ata_host *host);
 extern int ata_acpi_on_suspend(struct ata_port *ap);
 extern void ata_acpi_on_resume(struct ata_port *ap);
-extern int ata_acpi_on_devcfg(struct ata_device *adev);
+extern int ata_acpi_on_devcfg(struct ata_device *dev);
+extern void ata_acpi_on_disable(struct ata_device *dev);
 #else
 static inline void ata_acpi_associate_sata_port(struct ata_port *ap) { }
 static inline void ata_acpi_associate(struct ata_host *host) { }
+static inline void ata_acpi_dissociate(struct ata_host *host) { }
 static inline int ata_acpi_on_suspend(struct ata_port *ap) { return 0; }
 static inline void ata_acpi_on_resume(struct ata_port *ap) { }
-static inline int ata_acpi_on_devcfg(struct ata_device *adev) { return 0; }
+static inline int ata_acpi_on_devcfg(struct ata_device *dev) { return 0; }
+static inline void ata_acpi_on_disable(struct ata_device *dev) { }
 #endif
 
 /* libata-scsi.c */
-
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