[patch 9/9] serios: async shutdown

[akpm@linux-foundation.org]

From: Shaohua Li <shaohua.li@intel.com>

serio shutdown is quite slow. It sometimes will take 0.2s for each port.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/input/serio/serio.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff -puN drivers/input/serio/serio.c~serios-async-shutdown drivers/input/serio/serio.c
--- a/drivers/input/serio/serio.c~serios-async-shutdown
+++ a/drivers/input/serio/serio.c
@@ -36,6 +36,7 @@
 #include <linux/kthread.h>
 #include <linux/mutex.h>
 #include <linux/freezer.h>
+#include <linux/async.h>
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION("Serio abstraction core");
@@ -792,11 +793,17 @@ static void serio_cleanup(struct serio *
 	mutex_unlock(&serio->drv_mutex);
 }
 
+static void serio_async_shutdown(void *data, async_cookie_t cookie)
+{
+	struct serio *serio = data;
+	serio_cleanup(serio);
+}
+
 static void serio_shutdown(struct device *dev)
 {
 	struct serio *serio = to_serio_port(dev);
 
-	serio_cleanup(serio);
+	async_schedule(serio_async_shutdown, serio);
 }
 
 static void serio_attach_driver(struct serio_driver *drv)
_