4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jason Andryuk jandryuk@gmail.com
commit ef6eaf27274c0351f7059163918f3795da13199c upstream.
Commit ac75a041048b ("HID: i2c-hid: fix size check and type usage") started writing messages when the ret_size is <= 2 from i2c_master_recv. However, my device i2c-DLL07D1 returns 2 for a short period of time (~0.5s) after I stop moving the pointing stick or touchpad. It varies, but you get ~50 messages each time which spams the log hard.
[ 95.925055] i2c_hid i2c-DLL07D1:01: i2c_hid_get_input: incomplete report (83/2)
This has also been observed with a i2c-ALP0017.
[ 1781.266353] i2c_hid i2c-ALP0017:00: i2c_hid_get_input: incomplete report (30/2)
Only print the message when ret_size is totally invalid and less than 2 to cut down on the log spam.
Fixes: ac75a041048b ("HID: i2c-hid: fix size check and type usage") Reported-by: John Smith john-s-84@gmx.net Cc: stable@vger.kernel.org Signed-off-by: Jason Andryuk jandryuk@gmail.com Signed-off-by: Jiri Kosina jkosina@suse.cz Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/hid/i2c-hid/i2c-hid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/hid/i2c-hid/i2c-hid.c +++ b/drivers/hid/i2c-hid/i2c-hid.c @@ -477,7 +477,7 @@ static void i2c_hid_get_input(struct i2c return; }
- if ((ret_size > size) || (ret_size <= 2)) { + if ((ret_size > size) || (ret_size < 2)) { dev_err(&ihid->client->dev, "%s: incomplete report (%d/%d)\n", __func__, size, ret_size); return;