[077/118] usb: chipidea: udc: fix memory leak in _ep_nuke

Message ID 1367933964-1564-78-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques May 7, 2013, 1:38 p.m. -stable review patch.  If anyone has any objections, please let me know.


From: Michael Grzeschik <m.grzeschik@pengutronix.de>

commit 7ca2cd291fd84ae499390f227a255ccba2780a81 upstream.

In hardware_enqueue code adds one extra td with dma_pool_alloc if
mReq->req.zero is true. When _ep_nuke will be called for that endpoint,
dma_pool_free will not be called to free that memory again. That patch
fixes this.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
 drivers/usb/chipidea/udc.c | 6 ++++++
 1 file changed, 6 insertions(+)


diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 60bcf1c..113b4f1 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -541,6 +541,12 @@  __acquires(mEp->lock)
 		struct ci13xxx_req *mReq = \
 				   struct ci13xxx_req, queue);
+		if (mReq->zptr) {
+			dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma);
+			mReq->zptr = NULL;
+		}
 		mReq->req.status = -ESHUTDOWN;