From mboxrd@z Thu Jan 1 00:00:00 1970 From: Henrik Rydberg Subject: Re: [PATCH] Input: bcm5974.c initialize raw_w, raw_x and raw_y before it get used Date: Sun, 13 Sep 2009 01:24:46 +0200 Message-ID: <4AAC2DBE.9040303@bitmath.org> References: <1252775770.3687.7.camel@ht.satnam> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from csmtp1.one.com ([195.47.247.21]:55114 "EHLO csmtp1.one.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751405AbZILXfy (ORCPT ); Sat, 12 Sep 2009 19:35:54 -0400 In-Reply-To: <1252775770.3687.7.camel@ht.satnam> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Jaswinder Singh Rajput Cc: Dmitry Torokhov , linux-input@vger.kernel.org Jaswinder Singh Rajput wrote: > raw_w, raw_x and raw_y is used uninitialized for !raw_n Thanks for the heads up, but actually not, since !raw_n also implies !(ptest > PRESSURE_LOW). > This also fixed these compilation warnings : >=20 > CC [M] drivers/input/mouse/bcm5974.o > drivers/input/mouse/bcm5974.c: In function =E2=80=98report_tp_state=E2= =80=99: > drivers/input/mouse/bcm5974.c:319: warning: =E2=80=98raw_y=E2=80=99 m= ay be used uninitialized in this function > drivers/input/mouse/bcm5974.c:319: warning: =E2=80=98raw_x=E2=80=99 m= ay be used uninitialized in this function > drivers/input/mouse/bcm5974.c:319: warning: =E2=80=98raw_w=E2=80=99 m= ay be used uninitialized in this function >=20 > Signed-off-by: Jaswinder Singh Rajput > --- > drivers/input/mouse/bcm5974.c | 3 ++- > 1 files changed, 2 insertions(+), 1 deletions(-) >=20 > diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5= 974.c > index 2d8fc0b..171f345 100644 > --- a/drivers/input/mouse/bcm5974.c > +++ b/drivers/input/mouse/bcm5974.c > @@ -345,7 +345,8 @@ static int report_tp_state(struct bcm5974 *dev, i= nt size) > /* set the integrated button if applicable */ > if (c->tp_type =3D=3D TYPE2) > ibt =3D raw2int(dev->tp_data[BUTTON_TYPE2]); > - } > + } else > + raw_w =3D raw_x =3D raw_y =3D 0; > =20 > /* while tracking finger still valid, count all fingers */ > if (ptest > PRESSURE_LOW && origin) { I would prefer treating raw_p on the same footing here, completing the = set of non-obviously initialized variables. It might also make sense to utiliz= e the same initialization technique already used in the code, thus: diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm597= 4.c index 2d8fc0b..2f85876 100644 --- a/drivers/input/mouse/bcm5974.c +++ b/drivers/input/mouse/bcm5974.c @@ -316,7 +316,7 @@ static int report_tp_state(struct bcm5974 *dev, int= size) const struct bcm5974_config *c =3D &dev->cfg; const struct tp_finger *f; struct input_dev *input =3D dev->input; - int raw_p, raw_w, raw_x, raw_y, raw_n; + int raw_p =3D 0, raw_w =3D 0, raw_x =3D 0, raw_y =3D 0, raw_n; int ptest =3D 0, origin =3D 0, ibt =3D 0, nmin =3D 0, nmax =3D 0; int abs_p =3D 0, abs_w =3D 0, abs_x =3D 0, abs_y =3D 0; I wonder how many cpu cycles in the world are spent making compilers ha= ppy. Cheers, Henrik -- To unsubscribe from this list: send the line "unsubscribe linux-input" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html