On Mon, Oct 01, 2018 at 04:05:57PM -0700, Nick Desaulniers wrote:
> On Mon, Oct 1, 2018 at 8:22 AM Nathan Chancellor
> <natechancellor@xxxxxxxxx> wrote:
> >
> > Clang warns that the address of a pointer will always evaluated as true
> > in a boolean context.
> >
> > drivers/media/pci/cx18/cx18-driver.c:1255:23: warning: address of
> > 'cx->streams[i].video_dev' will always evaluate to 'true'
> > [-Wpointer-bool-conversion]
> > if (&cx->streams[i].video_dev)
> > ~~ ~~~~~~~~~~~~~~~^~~~~~~~~
> > 1 warning generated.
> >
> > Check whether v4l2_dev is null, not the address, so that the statement
> > doesn't fire all the time. This check has been present since 2009,
> > introduced by commit 21a278b85d3c ("V4L/DVB (11619): cx18: Simplify the
> > work handler for outgoing mailbox commands")
> >
> > Reported-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
> > Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
> > ---
> >
> > v1 -> v2:
> >
> > * Fix build error and logic per review from Hans
> >
> > drivers/media/pci/cx18/cx18-driver.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/media/pci/cx18/cx18-driver.c b/drivers/media/pci/cx18/cx18-driver.c
> > index 56763c4ea1a7..a6ba4ca5aa91 100644
> > --- a/drivers/media/pci/cx18/cx18-driver.c
> > +++ b/drivers/media/pci/cx18/cx18-driver.c
> > @@ -1252,7 +1252,7 @@ static void cx18_cancel_out_work_orders(struct cx18 *cx)
> > {
> > int i;
> > for (i = 0; i < CX18_MAX_STREAMS; i++)
> > - if (&cx->streams[i].video_dev)
> > + if (cx->streams[i].video_dev.v4l2_dev)
>
> There we go, that looks better! Thanks for respinning this patch. I
> would've given Hans credit in a Suggested-by tag, but there's not
> necessarily strict rules on that (and doesn't necessitate a v3).
> Maybe the maintainer could apply that to the commit message when
> applying? Either way:
>
> Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
>
Very fair point, I should have done that. Will be better about that in
the future.
Thank you for the review,
Nathan
> > cancel_work_sync(&cx->streams[i].out_work_order);
> > }
> >
> > --
> > 2.19.0
> >
>
>
> --
> Thanks,
> ~Nick Desaulniers
