Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (30 commits)
  ACPI: work around duplicate name "VID" problem on T61
  acpiphp_ibm: add missing '\n' to error message
  ACPI: add dump_stack() to trace acpi_format_exception programming errors
  make drivers/acpi/scan.c:create_modalias() static
  ACPI: Fix a warning of discarding qualifiers from pointer target type
  ACPI: "ACPI handle has no context!" should be KERN_DEBUG
  ACPI video hotkey: export missing ACPI video hotkey events via input layer
  ACPI: Validate XSDT, use RSDT if XSDT fails
  ACPI: /proc/acpi/thermal_zone trip points are now read-only, mark them as such
  ACPI: fix ia64 allnoconfig build
  PNP: remove null pointer checks
  PNP: remove MODULE infrastructure
  ISAPNP: removed unused isapnp_detected and ISAPNP_DEBUG
  PNPACPI: remove unnecessary casts of "void *"
  PNPACPI: simplify irq_flags()
  PNP: fix up after Lindent
  ACPI: enable GPEs before calling _WAK on resume
  asus-laptop: Fix rmmod of asus_laptop
  sony-laptop: call sonypi_compat_init earlier
  sony-laptop: enable Vaio FZ events
  ...

1 files changed, 31 insertions, 16 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 56bee9e065cf..43749c86861f 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -696,14 +696,6 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
 	return AE_CTRL_TERMINATE;
 }
 
-static void ec_remove_handlers(struct acpi_ec *ec)
-{
-	acpi_remove_address_space_handler(ec->handle,
-					  ACPI_ADR_SPACE_EC,
-					  &acpi_ec_space_handler);
-	acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
-}
-
 static int acpi_ec_add(struct acpi_device *device)
 {
 	struct acpi_ec *ec = NULL;
@@ -727,13 +719,16 @@ static int acpi_ec_add(struct acpi_device *device)
 	/* Check if we found the boot EC */
 	if (boot_ec) {
 		if (boot_ec->gpe == ec->gpe) {
-			ec_remove_handlers(boot_ec);
-			mutex_destroy(&boot_ec->lock);
-			kfree(boot_ec);
-			first_ec = boot_ec = NULL;
+			/* We might have incorrect info for GL at boot time */
+			mutex_lock(&boot_ec->lock);
+			boot_ec->global_lock = ec->global_lock;
+			/* Copy handlers from new ec into boot ec */
+			list_splice(&ec->list, &boot_ec->list);
+			mutex_unlock(&boot_ec->lock);
+			kfree(ec);
+			ec = boot_ec;
 		}
-	}
-	if (!first_ec)
+	} else
 		first_ec = ec;
 	ec->handle = device->handle;
 	acpi_driver_data(device) = ec;
@@ -762,6 +757,9 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
 	if (ec == first_ec)
 		first_ec = NULL;
 
+	/* Don't touch boot EC */
+	if (boot_ec != ec)
+		kfree(ec);
 	return 0;
 }
 
@@ -825,7 +823,9 @@ static int acpi_ec_start(struct acpi_device *device)
 	if (!ec)
 		return -EINVAL;
 
-	ret = ec_install_handlers(ec);
+	/* Boot EC is already working */
+	if (ec != boot_ec)
+		ret = ec_install_handlers(ec);
 
 	/* EC is fully operational, allow queries */
 	atomic_set(&ec->query_pending, 0);
@@ -835,6 +835,7 @@ static int acpi_ec_start(struct acpi_device *device)
 
 static int acpi_ec_stop(struct acpi_device *device, int type)
 {
+	acpi_status status;
 	struct acpi_ec *ec;
 
 	if (!device)
@@ -843,7 +844,21 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
 	ec = acpi_driver_data(device);
 	if (!ec)
 		return -EINVAL;
-	ec_remove_handlers(ec);
+
+	/* Don't touch boot EC */
+	if (ec == boot_ec)
+		return 0;
+
+	status = acpi_remove_address_space_handler(ec->handle,
+						   ACPI_ADR_SPACE_EC,
+						   &acpi_ec_space_handler);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	status = acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
 	return 0;
 }