Re: [PATCH 57/68] [media] anysee: fix a warning

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Em Tue, 06 Nov 2012 00:30:27 +0200
Antti Palosaari <crope@xxxxxx> escreveu:

> On 10/27/2012 11:41 PM, Mauro Carvalho Chehab wrote:
> > drivers/media/usb/dvb-usb-v2/anysee.c:1179:5: warning: 'tmp' may be used uninitialized in this function [-Wmaybe-uninitialized]
> >
> > Cc: Antti Palosaari <crope@xxxxxx>
> > Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
> > ---
> >   drivers/media/usb/dvb-usb-v2/anysee.c | 2 +-
> >   1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/media/usb/dvb-usb-v2/anysee.c b/drivers/media/usb/dvb-usb-v2/anysee.c
> > index e78ca8f..d05c5b5 100644
> > --- a/drivers/media/usb/dvb-usb-v2/anysee.c
> > +++ b/drivers/media/usb/dvb-usb-v2/anysee.c
> > @@ -1170,7 +1170,7 @@ static int anysee_ci_poll_slot_status(struct dvb_ca_en50221 *ci, int slot,
> >   	struct dvb_usb_device *d = ci->data;
> >   	struct anysee_state *state = d_to_priv(d);
> >   	int ret;
> > -	u8 tmp;
> > +	u8 tmp = 0;
> >
> >   	ret = anysee_rd_reg_mask(d, REG_IOC, &tmp, 0x40);
> >   	if (ret)
> >
> 
> That is another one I have looked multiple times - you are even asked to 
> look once few months back. I don't see how it could take that branch. 
> Maybe uninitialized_var() is a little bit cheaper?

It is a little cheaper, but I don't like uninitialized_var(), as it can hide
real problems. So, except when performance is really important, I tend
to not use it.

> 
> Anyway, I am OK with that too.
> 
> regards
> Antti
> 




Cheers,
Mauro
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