Commit 5aee41a6 authored by Luis Ortega's avatar Luis Ortega Committed by Dmitry Torokhov

Input: zforce - remove unnecessary payload data checks

The function zforce_read_packet() reads 2 values (bytes) of payload
header, validates them and then proceeds to read the payload body.
The function stores all these in a u8 buffer.

The PAYLOAD_LENGTH check seems to be trying to detect an overflow error.
However, since we are just reading a u8 value from the buffer, these
checks are unnecessary and we should simply compare against zero.
Signed-off-by: default avatarLuis Ortega <luiorpe1@upv.es>
Acked-by: default avatarHeiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de> - bq Cervantes (imx6sl)
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent ad697b96
......@@ -423,7 +423,7 @@ static int zforce_read_packet(struct zforce_ts *ts, u8 *buf)
goto unlock;
}
if (buf[PAYLOAD_LENGTH] <= 0 || buf[PAYLOAD_LENGTH] > 255) {
if (buf[PAYLOAD_LENGTH] == 0) {
dev_err(&client->dev, "invalid payload length: %d\n",
buf[PAYLOAD_LENGTH]);
ret = -EIO;
......
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