On Wed, Jun 27, 2012 at 10:11:00AM -0300, Mauro Carvalho Chehab wrote:
> Em 27-06-2012 06:06, Dan Carpenter escreveu:
> > The intent here was to test that the flag was clear but the '!' has
> > higher precedence than the '&'. I2C_M_RD is 0x1 so the current code is
> > equivalent to "&& (!sgs[i].flags) ..."
> >
> > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> > ---
> > I sent this originally on Wed, 25 Jan 2012 and Emil Goode sent the same
> > fix on Thu, May 3, 2012.
> >
> > diff --git a/drivers/media/dvb/dvb-usb/az6007.c b/drivers/media/dvb/dvb-usb/az6007.c
> > index 4008b9c..f6f0cf9 100644
> > --- a/drivers/media/dvb/dvb-usb/az6007.c
> > +++ b/drivers/media/dvb/dvb-usb/az6007.c
> > @@ -711,7 +711,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
> > addr = msgs[i].addr << 1;
> > if (((i + 1) < num)
> > && (msgs[i].len == 1)
> > - && (!msgs[i].flags & I2C_M_RD)
> > + && (!(msgs[i].flags & I2C_M_RD))
> > && (msgs[i + 1].flags & I2C_M_RD)
> > && (msgs[i].addr == msgs[i + 1].addr)) {
> > /*
> >
>
> Dan,
>
> Your logic is correct, however, I didn't apply this patch because it broke
> the driver.
>
> I'll need to re-visit the driver when I have some time, in order to be
> able to apply this one, without breaking the driver. I'll likely need to
> change some other things on this routine.
>
> (this has a low priority, as the driver is working properly the way it is).
>
> So, I'm keeping your patch at patchwork, while I don't find some time for it.
We could just put a comment next to the code and forget about it.
&& (!(msgs[i].flags & I2C_M_RD)) /* the fix needs testing. */
Sparse complains about this so it people are going to keep sending
patches for it. It's not like you should be stuck doing all the
work.
regards,
dan carpenter
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