From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Date: Sun, 08 Jul 2012 01:18:27 +0000 Subject: Re: [patch -resend] Input: ff-memless - fix a couple min_t() casts Message-Id: <20120708011827.GH19007@core.coreip.homeip.net> List-Id: References: <20120627085800.GA3007@mwanda> <20120627091118.GX31212@elgon.mountain> In-Reply-To: <20120627091118.GX31212@elgon.mountain> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Dan Carpenter Cc: Anssi Hannula , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org 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 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