ACPI: dock: Send key=value pair instead of plain value

Send key=value pair along with the uevent instead of a plain value so that
userspace (udev) can handle it like common environment variables.

Signed-off-by: Holger Macht <hmacht@suse.de>
Acked-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Cc: Stephan Berberig <s.berberig@arcor.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/dock.c

@@ -336,13 +336,13 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event)
 static void dock_event(struct dock_station *ds, u32 event, int num)
 {
 	struct device *dev = &dock_device->dev;
-	char event_string[7];
+	char event_string[13];
 	char *envp[] = { event_string, NULL };
 
 	if (num == UNDOCK_EVENT)
-		sprintf(event_string, "UNDOCK");
+		sprintf(event_string, "EVENT=undock");
 	else
-		sprintf(event_string, "DOCK");
+		sprintf(event_string, "EVENT=dock");
 
 	/*
 	 * Indicate that the status of the dock station has