Em Thu, 27 Dec 2012 18:12:46 -0300 Ezequiel Garcia <elezegarcia@xxxxxxxxx> escreveu: > Mauro, > > On Tue, Oct 23, 2012 at 4:57 PM, Ezequiel Garcia <elezegarcia@xxxxxxxxx> wrote: > > This kind of memcpy() is error-prone. Its replacement with a struct > > assignment is prefered because it's type-safe and much easier to read. > > > > Found by coccinelle. Hand patched and reviewed. > > Tested by compilation only. > > > > A simplified version of the semantic match that finds this problem is as > > follows: (http://coccinelle.lip6.fr/) > > > > // <smpl> > > @@ > > identifier struct_name; > > struct struct_name to; > > struct struct_name from; > > expression E; > > @@ > > -memcpy(&(to), &(from), E); > > +to = from; > > // </smpl> > > > > Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > > Signed-off-by: Peter Senna Tschudin <peter.senna@xxxxxxxxx> > > Signed-off-by: Ezequiel Garcia <elezegarcia@xxxxxxxxx> > > --- > > drivers/media/usb/uvc/uvc_v4l2.c | 6 +++--- > > 1 files changed, 3 insertions(+), 3 deletions(-) > > > > diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c > > index f00db30..4fc8737 100644 > > --- a/drivers/media/usb/uvc/uvc_v4l2.c > > +++ b/drivers/media/usb/uvc/uvc_v4l2.c > > @@ -314,7 +314,7 @@ static int uvc_v4l2_set_format(struct uvc_streaming *stream, > > goto done; > > } > > > > - memcpy(&stream->ctrl, &probe, sizeof probe); > > + stream->ctrl = probe; > > stream->cur_format = format; > > stream->cur_frame = frame; > > > > @@ -386,7 +386,7 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, > > return -EBUSY; > > } > > > > - memcpy(&probe, &stream->ctrl, sizeof probe); > > + probe = stream->ctrl; > > probe.dwFrameInterval = > > uvc_try_frame_interval(stream->cur_frame, interval); > > > > @@ -397,7 +397,7 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, > > return ret; > > } > > > > - memcpy(&stream->ctrl, &probe, sizeof probe); > > + stream->ctrl = probe; > > mutex_unlock(&stream->mutex); > > > > /* Return the actual frame period. */ > > -- > > 1.7.4.4 > > > > It seems you've marked this one as "Changes requested" [1]. > However, Laurent didn't request any change, > but just pointed out we missed one memcpy replacement candidate. > > I believe it's safe to apply the patch (together with the other 20 patches) > and we can fix the missing spot in another patch. The other patches got applied already. Well just do whatever Laurent asked you and re-submit this one ;) Regards, Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
