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

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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>
This commit is contained in:
Dmitry Osipenko 2021-03-26 15:19:27 -07:00 • committed by Dmitry Torokhov
parent 69d5ff3e9e
commit 781bab3238
1 changed files with 1 additions and 1 deletions
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2
drivers/input/touchscreen/elants_i2c.c
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@ -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);