Hi Ricardo, Thank you for the patch. On Mon, Jul 22, 2024 at 07:59:43AM +0000, Ricardo Ribalda wrote: > Custom control mapping introduced a bug, where the filter function was > applied to every single control. > > Fix it so it is only applied to the matching controls. > > Reported-by: Paul Menzen <pmenzel@xxxxxxxxxxxxx> > Closes: https://lore.kernel.org/linux-media/518cd6b4-68a8-4895-b8fc-97d4dae1ddc4@xxxxxxxxxxxxx/T/#t > Cc: stable@xxxxxxxxxxxxxxx > Fixes: 8f4362a8d42b ("media: uvcvideo: Allow custom control mapping") > Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx> > --- > Paul, could you check if this fixes your issue, thanks! > --- > drivers/media/usb/uvc/uvc_ctrl.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > > diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c > index 0136df5732ba..06fede57bf36 100644 > --- a/drivers/media/usb/uvc/uvc_ctrl.c > +++ b/drivers/media/usb/uvc/uvc_ctrl.c > @@ -2680,6 +2680,10 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain, > for (i = 0; i < ARRAY_SIZE(uvc_ctrl_mappings); ++i) { > const struct uvc_control_mapping *mapping = &uvc_ctrl_mappings[i]; > > + if (!(uvc_entity_match_guid(ctrl->entity, mapping->entity) && > + ctrl->info.selector == mapping->selector)) > + continue; I have a slight preference for if (!uvc_entity_match_guid(ctrl->entity, mapping->entity) || ctrl->info.selector != mapping->selector) continue; If that's fine with you, I can handle that when applying the patch. This change means that the entity and selector test will use the original mapping, not the mapping returned by the filtering function. I think that's fine, both mappings should have the same entity and selector, only the menu mask is meant to change. Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > + > /* Let the device provide a custom mapping. */ > if (mapping->filter_mapping) { > mapping = mapping->filter_mapping(chain, ctrl); > @@ -2687,9 +2691,7 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain, > continue; > } > > - if (uvc_entity_match_guid(ctrl->entity, mapping->entity) && > - ctrl->info.selector == mapping->selector) > - __uvc_ctrl_add_mapping(chain, ctrl, mapping); > + __uvc_ctrl_add_mapping(chain, ctrl, mapping); > } > } > > > --- > base-commit: 68a72104cbcf38ad16500216e213fa4eb21c4be2 > change-id: 20240722-fix-filter-mapping-18477dc69048 -- Regards, Laurent Pinchart
