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| author |   Luis Ortega <luiorpe1@upv.es> | 2014-01-27 12:27:49 -0800 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-01-27 22:35:17 -0800 |
| commit | 5aee41a60c4d53f65918c1ec0ab94c245f2c08af (patch) | |
| tree | 621414d35c644bbed2d75a02f490dda9d55f0b4d /drivers/input/touchscreen/zforce_ts.c | |
| parent | Input: zforce - fix lines exceeding 80 columns (diff) | |
| download | linux-dev-5aee41a60c4d53f65918c1ec0ab94c245f2c08af.tar.xz linux-dev-5aee41a60c4d53f65918c1ec0ab94c245f2c08af.zip | |
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: Luis Ortega <luiorpe1@upv.es>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de> - bq Cervantes (imx6sl)
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/touchscreen/zforce_ts.c')
| -rw-r--r-- | drivers/input/touchscreen/zforce_ts.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/zforce_ts.c b/drivers/input/touchscreen/zforce_ts.c index e87888c229ab..3ed024985a58 100644 --- a/drivers/input/touchscreen/zforce_ts.c +++ b/drivers/input/touchscreen/zforce_ts.c @@ -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; |