linux-kernel - [PATCH 2/3]async serio shutdown

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Date:	Mon, 12 Jan 2009 14:56:43 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>
Subject: [PATCH 2/3]async serio shutdown

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

Signed-off-by: Shaohua Li <shaohua.li@...el.com>
---
 drivers/input/serio/serio.c |    9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

Index: linux/drivers/input/serio/serio.c
===================================================================
--- linux.orig/drivers/input/serio/serio.c	2009-01-12 14:38:06.000000000 +0800
+++ linux/drivers/input/serio/serio.c	2009-01-12 14:41:24.000000000 +0800
@@ -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@....cz>");
 MODULE_DESCRIPTION("Serio abstraction core");
@@ -798,11 +799,17 @@ 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)


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