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path: root/drivers/input/touchscreen/wm97xx-core.c
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Diffstat (limited to 'drivers/input/touchscreen/wm97xx-core.c')
-rw-r--r--drivers/input/touchscreen/wm97xx-core.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/wm97xx-core.c b/drivers/input/touchscreen/wm97xx-core.c
index 5dbe73af2f8f..7e45c9f6e6b7 100644
--- a/drivers/input/touchscreen/wm97xx-core.c
+++ b/drivers/input/touchscreen/wm97xx-core.c
@@ -442,6 +442,16 @@ static int wm97xx_read_samples(struct wm97xx *wm)
"pen down: x=%x:%d, y=%x:%d, pressure=%x:%d\n",
data.x >> 12, data.x & 0xfff, data.y >> 12,
data.y & 0xfff, data.p >> 12, data.p & 0xfff);
+
+ if (abs_x[0] > (data.x & 0xfff) ||
+ abs_x[1] < (data.x & 0xfff) ||
+ abs_y[0] > (data.y & 0xfff) ||
+ abs_y[1] < (data.y & 0xfff)) {
+ dev_dbg(wm->dev, "Measurement out of range, dropping it\n");
+ rc = RC_AGAIN;
+ goto out;
+ }
+
input_report_abs(wm->input_dev, ABS_X, data.x & 0xfff);
input_report_abs(wm->input_dev, ABS_Y, data.y & 0xfff);
input_report_abs(wm->input_dev, ABS_PRESSURE, data.p & 0xfff);
@@ -455,6 +465,7 @@ static int wm97xx_read_samples(struct wm97xx *wm)
wm->ts_reader_interval = wm->ts_reader_min_interval;
}
+out:
mutex_unlock(&wm->codec_mutex);
return rc;
}