[PATCH v1 4/5] Input: edt-ft5x06 - do not try to allocate too much memory

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

When mode switch happens we try to allocate too much memory in case
when num_x and num_y are being assigned to their maximum.

Since the resolution should come from property in such case, reassign
values back to num_x and num_y to prevent too much memory allocation.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/input/touchscreen/edt-ft5x06.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index a05c6b597d43..1023d4134b8d 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -1178,6 +1178,13 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 
 	touchscreen_parse_properties(input, true, &tsdata->prop);
 
+	if (tsdata->num_x == U16_MAX && tsdata->prop.max_x &&
+	    tsdata->num_y == U16_MAX && tsdata->prop.max_y) {
+		/* Reassign num_x and num_y from properties */
+		tsdata->num_x = tsdata->prop.max_x;
+		tsdata->num_y = tsdata->prop.max_y;
+	}
+
 	error = input_mt_init_slots(input, tsdata->max_support_points,
 				INPUT_MT_DIRECT);
 	if (error) {
-- 
2.25.1