From: Alan Stern <stern@rowland.harvard.edu>
Date: Tue, 30 Jul 2013 19:18:15 +0000 (-0400)
Subject: usb: gadget: fix a bug and a WARN_ON in dummy-hcd
X-Git-Tag: v3.12-rc2~2^2^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f5610f69be3a925b1f79af27150bb7377bc9ad6;p=pandora-kernel.git

usb: gadget: fix a bug and a WARN_ON in dummy-hcd

This patch fixes a NULL pointer dereference and a WARN_ON in
dummy-hcd.  These things were the result of moving to the UDC core
framework, and possibly of changes to that framework.

Now unloading a gadget driver causes the UDC to be stopped after the
gadget driver is unbound, not before.  Therefore the "driver" argument
to dummy_udc_stop() can be NULL, so we must not try to print the
driver's name without checking first.

Also, the UDC framework automatically unregisters the gadget when the
UDC is deleted.  Therefore a sysfs attribute file attached to the
gadget must be removed before the UDC is deleted, not after.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

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