From 8e175b22e8640bf3a58e071af54190b909e4a944 Mon Sep 17 00:00:00 2001
From: A Sun <as1033x@comcast.net>
Date: Sun, 26 Mar 2017 15:33:07 -0300
Subject: [PATCH] [media] mceusb: sporadic RX truncation corruption fix
Git-commit: 8e175b22e8640bf3a58e071af54190b909e4a944
References: git-fixes
Patch-mainline: v4.13-rc1
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: Oliver Neukum <oneukum@suse.com>
---
drivers/media/rc/mceusb.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
index 93b16fe3ab38..e05fed2aaaa9 100644
--- a/drivers/media/rc/mceusb.c
+++ b/drivers/media/rc/mceusb.c
@@ -1337,8 +1337,13 @@ static int mceusb_dev_probe(struct usb_interface *intf,
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;
--
2.35.3