4.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Antonio Borneo <borneo.anto...@gmail.com>
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.anto...@gmail.com>
Tested-by: Ellen Wang <el...@cumulusnetworks.com>
Signed-off-by: Jiri Kosina <jkos...@suse.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
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);
--
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