On Wed, Jun 27, 2012 at 12:11:19PM +0300, Dan Carpenter wrote:
> envelope->attack_level is a u16 type. We're trying to clamp it here
> so it's between 0 and 0x7fff. Unfortunately, the cast to __s16 turns
> all the values larger than 0x7fff into negative numbers and min_t()
> thinks they are less than 0x7fff. envelope_level is an int so now
> we've got negative values stored there.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Applied, thank you Dan.
> ---
> Originally sent on Mon, 26 Sep 2011. I have added Anssi Hannula to the
> CC list.
>
> diff --git a/drivers/input/ff-memless.c b/drivers/input/ff-memless.c
> index 5f55885..b107922 100644
> --- a/drivers/input/ff-memless.c
> +++ b/drivers/input/ff-memless.c
> @@ -176,7 +176,7 @@ static int apply_envelope(struct ml_effect_state *state, int value,
> value, envelope->attack_level);
> time_from_level = jiffies_to_msecs(now - state->play_at);
> time_of_envelope = envelope->attack_length;
> - envelope_level = min_t(__s16, envelope->attack_level, 0x7fff);
> + envelope_level = min_t(u16, envelope->attack_level, 0x7fff);
>
> } else if (envelope->fade_length && effect->replay.length &&
> time_after(now,
> @@ -184,7 +184,7 @@ static int apply_envelope(struct ml_effect_state *state, int value,
> time_before(now, state->stop_at)) {
> time_from_level = jiffies_to_msecs(state->stop_at - now);
> time_of_envelope = envelope->fade_length;
> - envelope_level = min_t(__s16, envelope->fade_level, 0x7fff);
> + envelope_level = min_t(u16, envelope->fade_level, 0x7fff);
> } else
> return value;
>
--
Dmitry
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