Hi Kieran, On Monday, 24 September 2018 15:50:45 EEST Kieran Bingham wrote: > On 01/08/18 22:55, Laurent Pinchart wrote: > > From: Joel Pepper <joel.pep...@rwth-aachen.de> > > > > While checks are in place to avoid attributes and children of a format > > being manipulated after the format is linked into the streaming header, > > the linked flag was never actually set, invalidating the protections. > > That explains what's wrong, but not what we do about it. How about adding: > > "Update the flag as appropriate in the header link calls."
Sounds good to me, I'll update that. > > Signed-off-by: Joel Pepper <joel.pep...@rwth-aachen.de> > > Missing and S-o-B from Laurent here? (I guess that will be added later?) I haven't modified the patch, so haven't added my SoB to send it to the mailing list. I'll add it before issuing the pull request. > Otherwise, > > Reviewed-by: Kieran Bingham <kieran.bing...@ideasonboard.com> > > > --- > > > > drivers/usb/gadget/function/uvc_configfs.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/drivers/usb/gadget/function/uvc_configfs.c > > b/drivers/usb/gadget/function/uvc_configfs.c index > > b8763343dcae..799dc32c5bc7 100644 > > --- a/drivers/usb/gadget/function/uvc_configfs.c > > +++ b/drivers/usb/gadget/function/uvc_configfs.c > > @@ -928,6 +928,7 @@ static int uvcg_streaming_header_allow_link(struct > > config_item *src,> > > format_ptr->fmt = target_fmt; > > list_add_tail(&format_ptr->entry, &src_hdr->formats); > > ++src_hdr->num_fmt; > > > > + ++target_fmt->linked; > > > > out: > > mutex_unlock(&opts->lock); > > > > @@ -965,6 +966,8 @@ static void uvcg_streaming_header_drop_link(struct > > config_item *src,> > > break; > > > > } > > > > + --target_fmt->linked; > > + > > > > out: > > mutex_unlock(&opts->lock); > > mutex_unlock(su_mutex); -- Regards, Laurent Pinchart
