From fa9395add2f8657775949185fb04c37c6154bc34 Mon Sep 17 00:00:00 2001
From: Matthew Garrett <mjg59@srcf.ucam.org>
Date: Wed, 3 Oct 2007 01:24:16 +0100
Subject: [PATCH] --- yaml --- r: 68148 b: refs/heads/master c:
 237d8440cb2b104a3b97fc971a9bce67960bb616 h: refs/heads/master v: v3

---
 [refs]                          |  2 +-
 trunk/drivers/ata/libata-acpi.c | 60 ++++++++++++++++++++++++++++++++-
 2 files changed, 60 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 568bc6d47511..e1c68205cbd1 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b3a706014e56b1356e7b275fd25b833c63175bf0
+refs/heads/master: 237d8440cb2b104a3b97fc971a9bce67960bb616
diff --git a/trunk/drivers/ata/libata-acpi.c b/trunk/drivers/ata/libata-acpi.c
index a276c06dda95..5ebbf16f3af1 100644
--- a/trunk/drivers/ata/libata-acpi.c
+++ b/trunk/drivers/ata/libata-acpi.c
@@ -14,6 +14,7 @@
 #include <linux/acpi.h>
 #include <linux/libata.h>
 #include <linux/pci.h>
+#include <scsi/scsi_device.h>
 #include "libata.h"
 
 #include <acpi/acpi_bus.h>
@@ -95,6 +96,47 @@ static void ata_acpi_associate_ide_port(struct ata_port *ap)
 	}
 }
 
+static void ata_acpi_handle_hotplug (struct ata_port *ap, struct kobject *kobj,
+				     u32 event)
+{
+	char event_string[12];
+	char *envp[] = { event_string, NULL };
+	struct ata_eh_info *ehi = &ap->link.eh_info;
+
+	if (event == 0 || event == 1) {
+	       unsigned long flags;
+	       spin_lock_irqsave(ap->lock, flags);
+	       ata_ehi_clear_desc(ehi);
+	       ata_ehi_push_desc(ehi, "ACPI event");
+	       ata_ehi_hotplugged(ehi);
+	       ata_port_freeze(ap);
+	       spin_unlock_irqrestore(ap->lock, flags);
+	}
+
+	if (kobj) {
+	        sprintf(event_string, "BAY_EVENT=%d", event);
+		kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
+	}
+}
+
+static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data)
+{
+	struct ata_device *dev = data;
+	struct kobject *kobj = NULL;
+
+	if (dev->sdev)
+		kobj = &dev->sdev->sdev_gendev.kobj;
+
+	ata_acpi_handle_hotplug (dev->link->ap, kobj, event);
+}
+
+static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data)
+{
+	struct ata_port *ap = data;
+
+	ata_acpi_handle_hotplug (ap, &ap->dev->kobj, event);
+}
+
 /**
  * ata_acpi_associate - associate ATA host with ACPI objects
  * @host: target ATA host
@@ -110,7 +152,7 @@ static void ata_acpi_associate_ide_port(struct ata_port *ap)
  */
 void ata_acpi_associate(struct ata_host *host)
 {
-	int i;
+	int i, j;
 
 	if (!is_pci_dev(host->dev) || libata_noacpi)
 		return;
@@ -126,6 +168,22 @@ void ata_acpi_associate(struct ata_host *host)
 			ata_acpi_associate_sata_port(ap);
 		else
 			ata_acpi_associate_ide_port(ap);
+
+		if (ap->acpi_handle)
+			acpi_install_notify_handler (ap->acpi_handle,
+						     ACPI_SYSTEM_NOTIFY,
+						     ata_acpi_ap_notify,
+						     ap);
+
+		for (j = 0; j < ata_link_max_devices(&ap->link); j++) {
+			struct ata_device *dev = &ap->link.device[j];
+
+			if (dev->acpi_handle)
+				acpi_install_notify_handler (dev->acpi_handle,
+							     ACPI_SYSTEM_NOTIFY,
+							     ata_acpi_dev_notify,
+							     dev);
+		}
 	}
 }