This is a note to let you know that I've just added the patch titled HID: cp2112: fix to force single data-report reply to the 4.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: hid-cp2112-fix-to-force-single-data-report-reply.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 6debce6f4e787a8eb4cec94e7afa85fb4f40db27 Mon Sep 17 00:00:00 2001 From: Antonio Borneo <borneo.antonio@xxxxxxxxx> Date: Sun, 21 Jun 2015 14:20:25 +0800 Subject: HID: cp2112: fix to force single data-report reply From: Antonio Borneo <borneo.antonio@xxxxxxxxx> commit 6debce6f4e787a8eb4cec94e7afa85fb4f40db27 upstream. Current implementation of cp2112_raw_event() only accepts one data report at a time. If last received data report is not fully handled yet, a new incoming data report will overwrite it. In such case we don't guaranteed to propagate the correct incoming data. The trivial fix implemented here forces a single report at a time by requesting in cp2112_read() no more than 61 byte of data, which is the payload size of a single data report. Signed-off-by: Antonio Borneo <borneo.antonio@xxxxxxxxx> Tested-by: Ellen Wang <ellen@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Jiri Kosina <jkosina@xxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/hid/hid-cp2112.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/hid/hid-cp2112.c +++ b/drivers/hid/hid-cp2112.c @@ -356,6 +356,8 @@ static int cp2112_read(struct cp2112_dev struct cp2112_force_read_report report; int ret; + if (size > sizeof(dev->read_data)) + size = sizeof(dev->read_data); report.report = CP2112_DATA_READ_FORCE_SEND; report.length = cpu_to_be16(size); Patches currently in stable-queue which might be from borneo.antonio@xxxxxxxxx are queue-4.1/hid-cp2112-fix-to-force-single-data-report-reply.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html