releases/2.6.32.12/input-wacom-switch-mode-upon-system-resume.patch

From pingc@wacom.com  Wed Apr 21 15:34:14 2010
From: Ping Cheng <pingc@wacom.com>
Date: Mon, 19 Apr 2010 11:10:50 -0700
Subject: Input: wacom - switch mode upon system resume
To: "Dmitry Torokhov" <dmitry.torokhov@gmail.com>, "Greg KH" <gregkh@suse.de>
Cc: <Anton@anikin.name>, <stable@kernel.org>, <stable-commits@vger.kernel.org>
Message-ID: <6753EB6004AFF34FAA275742C104F95201DF6FE3@wacom-nt10.wacom.com>

From: Ping Cheng <pingc@wacom.com>

commit 014f61504af276ba9d9544d8a7401d8f8526eb73 upstream.

When Wacom devices wake up from a sleep, the switch mode command
(wacom_query_tablet_data) is needed before wacom_open is called.
wacom_query_tablet_data should not be executed inside wacom_open
since wacom_open is called more than once during probe.

Reported-and-tested-by: Anton Anikin <Anton@Anikin.name>
Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/input/tablet/wacom_sys.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -562,11 +562,15 @@ static int wacom_resume(struct usb_inter
 	int rv;
 
 	mutex_lock(&wacom->lock);
-	if (wacom->open) {
+
+	/* switch to wacom mode first */
+	wacom_query_tablet_data(intf);
+
+	if (wacom->open)
 		rv = usb_submit_urb(wacom->irq, GFP_NOIO);
-		wacom_query_tablet_data(intf);
-	} else
+	else
 		rv = 0;
+
 	mutex_unlock(&wacom->lock);
 
 	return rv;