| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.19 044/175] [media] lmedm04: Fix usb_submit_urb BOGUS urb xfer, pipe 1 != type 3 in interrupt urb | Date | Tue, 3 Mar 2015 22:13:42 -0800 |
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3.19-stable review patch. If anyone has any objections, please let me know.
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From: Malcolm Priestley <tvboxspy@gmail.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@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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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