linux-kernel - [ 082/262] usb: gadget: at91udc: dont overwrite driver data

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Date:	Fri, 28 Sep 2012 11:50:11 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>, alan@...rguk.ukuu.org.uk,
	Fabio Porcedda <fabio.porcedda@...il.com>,
	Mario Isidoro <Mario.Isidoro@...mic.pt>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Felipe Balbi <balbi@...com>
Subject: [ 082/262] usb: gadget: at91udc: dont overwrite driver data

From: Greg KH <gregkh@...uxfoundation.org>

3.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

commit 8b7dda554cf61e87523dee412eaf598f8646bd79 upstream.

The driver was converted to the new start/stop interface in f3d8bf34c2
("usb: gadget: at91_udc: convert to new style start/stop interface").
I overlooked that the driver is overwritting the private data which is
used by the composite framework. The udc driver doesn't read it, it is
only written here.

Tested-by: Fabio Porcedda <fabio.porcedda@...il.com>
Tested-by: Mario Isidoro <Mario.Isidoro@...mic.pt>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Felipe Balbi <balbi@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/gadget/at91_udc.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1634,7 +1634,6 @@ static int at91_start(struct usb_gadget
 	udc = container_of(gadget, struct at91_udc, gadget);
 	udc->driver = driver;
 	udc->gadget.dev.driver = &driver->driver;
-	dev_set_drvdata(&udc->gadget.dev, &driver->driver);
 	udc->enabled = 1;
 	udc->selfpowered = 1;
 
@@ -1655,7 +1654,6 @@ static int at91_stop(struct usb_gadget *
 	spin_unlock_irqrestore(&udc->lock, flags);
 
 	udc->gadget.dev.driver = NULL;
-	dev_set_drvdata(&udc->gadget.dev, NULL);
 	udc->driver = NULL;
 
 	DBG("unbound from %s\n", driver->driver.name);


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