Input: elantench - fix misreporting trackpoint coordinates
authorPhoenix Huang <phoenix@emc.com.tw>
Mon, 8 Nov 2021 06:00:03 +0000 (22:00 -0800)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>
Wed, 10 Nov 2021 06:22:43 +0000 (22:22 -0800)
commitbe896bd3b72b44126c55768f14c22a8729b0992e
treea49f6768224c13a53fd3834207843a7da702d2fd
parent6e4860410b828f8576c0c003d412fcf8a7d433f9
Input: elantench - fix misreporting trackpoint coordinates

Some firmwares occasionally report bogus data from trackpoint, with X or Y
displacement being too large (outside of [-127, 127] range). Let's drop such
packets so that we do not generate jumps.

Signed-off-by: Phoenix Huang <phoenix@emc.com.tw>
Tested-by: Yufei Du <yufeidu@cs.unc.edu>
Link: https://lore.kernel.org/r/20210729010940.5752-1-phoenix@emc.com.tw
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
drivers/input/mouse/elantech.c