]> www.infradead.org Git - users/jedix/linux-maple.git/commit
HID: cp2112: fix to force single data-report reply
authorAntonio Borneo <borneo.antonio@gmail.com>
Sun, 21 Jun 2015 06:20:25 +0000 (14:20 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 10 Aug 2015 19:21:55 +0000 (12:21 -0700)
commit103c46c95b48b228c98a8751726ab3bd9e90b525
treec0da40740f0fed9c43657ca5f0037f1b2128368d
parent5ca991392ffc8fb1aaff9008fb3a2471ce578120
HID: cp2112: fix to force single data-report reply

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@gmail.com>
Tested-by: Ellen Wang <ellen@cumulusnetworks.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/hid/hid-cp2112.c