This is a note to let you know that I've just added the patch titled

[media] mceusb: sporadic RX truncation corruption fix

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: mceusb-sporadic-rx-truncation-corruption-fix.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Mon Apr 9 17:09:24 CEST 2018

From: A Sun as1033x@comcast.net Date: Sun, 26 Mar 2017 15:33:07 -0300 Subject: [media] mceusb: sporadic RX truncation corruption fix

From: A Sun as1033x@comcast.net

[ Upstream commit 8e175b22e8640bf3a58e071af54190b909e4a944 ]

Intermittent RX truncation and loss of IR received data. This resulted in receive stream synchronization errors where driver attempted to incorrectly parse IR data (eg 0x90 below) as command response.

[ 3969.139898] mceusb 1-1.2:1.0: processed IR data [ 3969.151315] mceusb 1-1.2:1.0: rx data: 00 90 (length=2) [ 3969.151321] mceusb 1-1.2:1.0: Unknown command 0x00 0x90 [ 3969.151336] mceusb 1-1.2:1.0: rx data: 98 0a 8d 0a 8e 0a 8e 0a 8e 0a 8e 0a 9a 0a 8e 0a 0b 3a 8e 00 80 41 59 00 00 (length=25) [ 3969.151341] mceusb 1-1.2:1.0: Raw IR data, 24 pulse/space samples [ 3969.151348] mceusb 1-1.2:1.0: Storing space with duration 500000

Bug trigger appears to be normal, but heavy, IR receiver use.

Signed-off-by: A Sun as1033x@comcast.net Signed-off-by: Sean Young sean@mess.org Signed-off-by: Mauro Carvalho Chehab mchehab@s-opensource.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/media/rc/mceusb.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/media/rc/mceusb.c +++ b/drivers/media/rc/mceusb.c @@ -1381,8 +1381,13 @@ static int mceusb_dev_probe(struct usb_i goto rc_dev_fail;

/* wire up inbound data handler */ - usb_fill_int_urb(ir->urb_in, dev, pipe, ir->buf_in, maxp, - mceusb_dev_recv, ir, ep_in->bInterval); + if (usb_endpoint_xfer_int(ep_in)) + usb_fill_int_urb(ir->urb_in, dev, pipe, ir->buf_in, maxp, + mceusb_dev_recv, ir, ep_in->bInterval); + else + usb_fill_bulk_urb(ir->urb_in, dev, pipe, ir->buf_in, maxp, + mceusb_dev_recv, ir); + ir->urb_in->transfer_dma = ir->dma_in; ir->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

Patches currently in stable-queue which might be from as1033x@comcast.net are

queue-4.9/mceusb-sporadic-rx-truncation-corruption-fix.patch