Commit 781bab32 authored Mar 26, 2021 by Dmitry Osipenko Committed by Dmitry Torokhov Mar 27, 2021

Input: elants_i2c - fix division by zero if firmware reports zero phys size



Touchscreen firmware of ASUS Transformer TF700T reports zeros for the phys
size. Hence check whether the size is zero and don't set the resolution in
this case.

Reported-by: Jasper Korten <jja2000@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20210302100824.3423-1-digetx@gmail.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

parent 69d5ff3e

drivers/input/touchscreen/elants_i2c.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1441,7 +1441,7 @@ static int elants_i2c_probe(struct i2c_client *client,

		touchscreen_parse_properties(ts->input, true, &ts->prop);

		if (ts->chip_id == EKTF3624) {
		if (ts->chip_id == EKTF3624 && ts->phy_x && ts->phy_y) {
		/* calculate resolution from size */
		ts->x_res = DIV_ROUND_CLOSEST(ts->prop.max_x, ts->phy_x);
		ts->y_res = DIV_ROUND_CLOSEST(ts->prop.max_y, ts->phy_y);