From: Matthieu CASTET <matthieu.castet@parrot.com>
Date: Wed, 19 Feb 2014 05:46:31 +0000 (+0800)
Subject: usb: chipidea: need to mask when writting endptflush and endptprime
X-Git-Tag: v3.14-rc4~6^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5bf5dbeda2454296f1984adfbfc8e6f5965ac389;p=pandora-kernel.git

usb: chipidea: need to mask when writting endptflush and endptprime

ENDPTFLUSH and ENDPTPRIME registers are set by software and clear
by hardware. There is a bit for each endpoint. When we are setting
a bit for an endpoint we should make sure we do not touch other
endpoint bit. There is a race condition if the hardware clear the
bit between the read and the write in hw_write.

Cc: stable <stable@vger.kernel.org> # 3.11+
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Tested-by: Michael Grzeschik <mgrzeschik@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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