From: John Stultz <john.stultz@linaro.org>
Date: Thu, 21 Jul 2011 00:09:34 +0000 (-0700)
Subject: usb: musb: fix oops on musb_gadget_pullup
X-Git-Tag: v3.1-rc2~14^2~20^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72c487dfb94d02025fb7437dfe2314d836d5a9ab;p=pandora-kernel.git

usb: musb: fix oops on musb_gadget_pullup

an 'unhandled fault' is causes when a gadget driver calls
usb_gadget_connect() while the USB cable isn't plugged into
the OTG port.

the fault is caused by an access to MUSB's memory space
while its clock is turned off due to pm_runtime kicking
in.

in order to fix the fault, we enclose musb_gadget_pullup()
with pm_runtime_get_sync() ... pm_runtime_put() calls to
be sure we will always reach that path with clock turned on.

[ balbi@ti.com : simplified commit log; removed few things
	which didn't belong there ]

Cc: stable@kernel.org
Reported-by: Zach Pfeffer <zach.pfeffer@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

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