linux-kernel - [PATCH 3.18 038/151] [media] lmedm04: Fix usb_submit_urb BOGUS urb xfer, pipe 1 != type 3 in interrupt urb

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Message-Id: <20150304055503.431110380@linuxfoundation.org>
Date:	Tue,  3 Mar 2015 22:12:52 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Malcolm Priestley <tvboxspy@...il.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
Subject: [PATCH 3.18 038/151] [media] lmedm04: Fix usb_submit_urb BOGUS urb xfer, pipe 1 != type 3 in interrupt urb

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

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

From: Malcolm Priestley <tvboxspy@...il.com>

commit 15e1ce33182d1d5dbd8efe8d382b9352dc857527 upstream.

A quirk of some older firmwares that report endpoint pipe type as PIPE_BULK
but the endpoint otheriwse functions as interrupt.

Check if usb_endpoint_type is USB_ENDPOINT_XFER_BULK and set as usb_rcvbulkpipe.

Signed-off-by: Malcolm Priestley <tvboxspy@...il.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/usb/dvb-usb-v2/lmedm04.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/media/usb/dvb-usb-v2/lmedm04.c
+++ b/drivers/media/usb/dvb-usb-v2/lmedm04.c
@@ -354,6 +354,7 @@ static int lme2510_int_read(struct dvb_u
 {
 	struct dvb_usb_device *d = adap_to_d(adap);
 	struct lme2510_state *lme_int = adap_to_priv(adap);
+	struct usb_host_endpoint *ep;
 
 	lme_int->lme_urb = usb_alloc_urb(0, GFP_ATOMIC);
 
@@ -375,6 +376,12 @@ static int lme2510_int_read(struct dvb_u
 				adap,
 				8);
 
+	/* Quirk of pipe reporting PIPE_BULK but behaves as interrupt */
+	ep = usb_pipe_endpoint(d->udev, lme_int->lme_urb->pipe);
+
+	if (usb_endpoint_type(&ep->desc) == USB_ENDPOINT_XFER_BULK)
+		lme_int->lme_urb->pipe = usb_rcvbulkpipe(d->udev, 0xa),
+
 	lme_int->lme_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 
 	usb_submit_urb(lme_int->lme_urb, GFP_ATOMIC);


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