On Tue, May 22, 2018 at 11:33:35AM +0300, Jani Nikula wrote:
> On Mon, 21 May 2018, Maya Rashish <[email protected]> wrote:
> > In drm_dp_i2c_drain_msg we do msg.buffer += err which isn't
> > legal for void *.
>
> Well, this isn't pedantic C, it's GCC. There are tons of pointer
> arithmetics for void pointers all over the kernel.
I thought C99 even deprecated char * as the generic pointer, recommending
void * instead, which guarantees the exact same pointer arithmetic as char
* (but has the special casting rules).
Which static checker came up with this?
-Daniel
>
> BR,
> Jani.
>
> > ---
> > include/drm/drm_dp_helper.h | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
> > index 62903bae..06f9a61f 100644
> > --- a/include/drm/drm_dp_helper.h
> > +++ b/include/drm/drm_dp_helper.h
> > @@ -1058,7 +1058,7 @@ struct drm_dp_aux_msg {
> > unsigned int address;
> > u8 request;
> > u8 reply;
> > - void *buffer;
> > + char *buffer;
> > size_t size;
> > };
>
> --
> Jani Nikula, Intel Open Source Graphics Center
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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