[Intel-gfx] [PATCH 2/3] drm: Sync errno values for property lookup errors

[Ville Syrjälä]

On Tue, Jan 22, 2019 at 10:39:38AM +0100, Daniel Vetter wrote:
> On Mon, Jan 21, 2019 at 10:24:29PM +0200, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > Use ENOENT consistently for the case where the requested property
> > isn't found, and EINVAL for the case where the object has no
> > properties whatsoever. Currenrly these are handled differently
> > in the atomic and legacy codepaths.
> > 
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Matches https://dri.freedesktop.org/docs/drm/gpu/drm-uapi.html#recommended-ioctl-return-values
> 
> Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> 
> Any igts that blow up with this? We should have at least some trying to do
> invalid stuff ...

Looks like there was something caught by ci. I'll have to look those
over.

Also the logs seem to full of my
<7> [625.952666] [drm:drm_modeset_backoff] Retrying to avoid deadlock

Not sure if that debug print is a good idea after all :/

> -Daniel
> 
> > ---
> >  drivers/gpu/drm/drm_atomic_uapi.c | 2 +-
> >  drivers/gpu/drm/drm_mode_object.c | 1 +
> >  2 files changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
> > index 06390307e5a3..2a54f826cf65 100644
> > --- a/drivers/gpu/drm/drm_atomic_uapi.c
> > +++ b/drivers/gpu/drm/drm_atomic_uapi.c
> > @@ -1330,7 +1330,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev,
> >  			DRM_DEBUG_ATOMIC("Object ID %d has no properties\n",
> >  					 obj_id);
> >  			drm_mode_object_put(obj);
> > -			ret = -ENOENT;
> > +			ret = -EINVAL;
> >  			goto out;
> >  		}
> >  
> > diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_object.c
> > index e8dac94d576d..31730d935842 100644
> > --- a/drivers/gpu/drm/drm_mode_object.c
> > +++ b/drivers/gpu/drm/drm_mode_object.c
> > @@ -527,6 +527,7 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
> >  	property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id);
> >  	if (!property) {
> >  		DRM_DEBUG_KMS("Unknown property ID %d\n", arg->prop_id);
> > +		ret = -ENOENT;
> >  		goto out_unref;
> >  	}
> >  
> > -- 
> > 2.19.2
> > 
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

-- 
Ville Syrjälä
Intel