linux-kernel - [PATCH 3.17 18/25] Revert "usb: gadget: composite: dequeue cdev->req before free it in composite_dev

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Message-Id: <20141013022455.072752737@linuxfoundation.org>
Date:	Mon, 13 Oct 2014 04:25:11 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Li Jun <b47624@...escale.com>,
	Felipe Balbi <balbi@...com>
Subject: [PATCH 3.17 18/25] Revert "usb: gadget: composite: dequeue cdev->req before free it in composite_dev_cleanup"

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

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

From: Felipe Balbi <balbi@...com>

commit bf17eba7ae1e813b0ad67cb1078dcbd7083b906e upstream.

This reverts commit f2267089ea17fa97b796b1b4247e3f8957655df3.

That commit causes more problem than fixes. Firstly, kfree()
should be called after usb_ep_dequeue() and secondly, the way
things are, we will try to dequeue a request that has already
completed much more frequently than one which is pending.

Cc: Li Jun <b47624@...escale.com>
Signed-off-by: Felipe Balbi <balbi@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/gadget/composite.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1956,7 +1956,6 @@ void composite_dev_cleanup(struct usb_co
 	}
 	if (cdev->req) {
 		kfree(cdev->req->buf);
-		usb_ep_dequeue(cdev->gadget->ep0, cdev->req);
 		usb_ep_free_request(cdev->gadget->ep0, cdev->req);
 	}
 	cdev->next_string_id = 0;


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