| Message ID | 4AAC2DBE.9040303@bitmath.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On Sun, 2009-09-13 at 01:24 +0200, Henrik Rydberg wrote: > 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). > Then can we move 'if (ptest > PRESSURE_LOW && origin)' stuff to 'if (raw_n)'. If not then my patch is correct. > > This also fixed these compilation warnings : > > > > CC [M] drivers/input/mouse/bcm5974.o > > drivers/input/mouse/bcm5974.c: In function ‘report_tp_state’: > > drivers/input/mouse/bcm5974.c:319: warning: ‘raw_y’ may be used uninitialized in this function > > drivers/input/mouse/bcm5974.c:319: warning: ‘raw_x’ may be used uninitialized in this function > > drivers/input/mouse/bcm5974.c:319: warning: ‘raw_w’ may be used uninitialized in this function > > > > Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> > > --- > > drivers/input/mouse/bcm5974.c | 3 ++- > > 1 files changed, 2 insertions(+), 1 deletions(-) > > > > diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.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, int size) > > /* set the integrated button if applicable */ > > if (c->tp_type == TYPE2) > > ibt = raw2int(dev->tp_data[BUTTON_TYPE2]); > > - } > > + } else > > + raw_w = raw_x = raw_y = 0; > > > > /* 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 utilize the > same initialization technique already used in the code, thus: > No, then you are wasting cpu cycles and doing double initialization for some cases. > diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.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 = &dev->cfg; > const struct tp_finger *f; > struct input_dev *input = dev->input; > - int raw_p, raw_w, raw_x, raw_y, raw_n; > + int raw_p = 0, raw_w = 0, raw_x = 0, raw_y = 0, raw_n; > int ptest = 0, origin = 0, ibt = 0, nmin = 0, nmax = 0; > int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0; > > > I wonder how many cpu cycles in the world are spent making compilers happy. > It is not compiler mistake it is programming/logic mistakes. We should be thankful to compiler to pointing mistakes made by us. Thanks, -- JSR -- 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
diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.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 = &dev->cfg; const struct tp_finger *f; struct input_dev *input = dev->input; - int raw_p, raw_w, raw_x, raw_y, raw_n; + int raw_p = 0, raw_w = 0, raw_x = 0, raw_y = 0, raw_n; int ptest = 0, origin = 0, ibt = 0, nmin = 0, nmax = 0; int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0;