[patch 9/10] fix for bay in a dock station

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an ATA bay can be in a dock and itself can be ejected separately. The
patch handles such eject bay. Found by Holger.

Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx> 
---
 drivers/acpi/dock.c |   14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

Index: linux/drivers/acpi/dock.c
===================================================================
--- linux.orig/drivers/acpi/dock.c	2008-07-07 11:50:34.000000000 +0800
+++ linux/drivers/acpi/dock.c	2008-07-07 11:52:34.000000000 +0800
@@ -606,6 +606,7 @@ register_hotplug_dock_device(acpi_handle
 {
 	struct dock_dependent_device *dd;
 	struct dock_station *dock_station;
+	int ret = -EINVAL;
 
 	if (!dock_station_count)
 		return -ENODEV;
@@ -615,16 +616,21 @@ register_hotplug_dock_device(acpi_handle
 	 * this would include the dock station itself
 	 */
 	list_for_each_entry(dock_station, &dock_stations, sibiling) {
+		/*
+		 * An ATA bay can be in a dock and itself can be ejected
+		 * separately, so there are two 'dock stations' which need the
+		 * ops
+		 */
 		dd = find_dock_dependent_device(dock_station, handle);
 		if (dd) {
 			dd->ops = ops;
 			dd->context = context;
 			dock_add_hotplug_device(dock_station, dd);
-			return 0;
+			ret = 0;
 		}
 	}
 
-	return -EINVAL;
+	return ret;
 }
 
 EXPORT_SYMBOL_GPL(register_hotplug_dock_device);
@@ -1070,8 +1076,8 @@ find_dock(acpi_handle handle, u32 lvl, v
 static acpi_status
 find_bay(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
-	/* If bay is in a dock, it's already handled */
-	if (is_ejectable_bay(handle) && !is_dock_device(handle))
+	/* If bay is a dock, it's already handled */
+	if (is_ejectable_bay(handle) && !is_dock(handle))
 		dock_add(handle);
 	return AE_OK;
 }


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