[PATCH 1/7] drm: Consistently return -ENOENT when a mode object can't be found

[Alex Deucher]

On Thu, Oct 17, 2013 at 6:35 AM,  <ville.syrjala at linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> We tend to return -EINVAL for everything. Let's try to help poor
> userland developers a bit by at least returning -ENONET for missing
> objects.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

For the series:

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/drm_crtc.c | 32 ++++++++++++++++++--------------
>  1 file changed, 18 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index d7a8370..bb5dedd 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -1557,7 +1557,7 @@ int drm_mode_getcrtc(struct drm_device *dev,
>         obj = drm_mode_object_find(dev, crtc_resp->crtc_id,
>                                    DRM_MODE_OBJECT_CRTC);
>         if (!obj) {
> -               ret = -EINVAL;
> +               ret = -ENOENT;
>                 goto out;
>         }
>         crtc = obj_to_crtc(obj);
> @@ -1641,7 +1641,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
>         obj = drm_mode_object_find(dev, out_resp->connector_id,
>                                    DRM_MODE_OBJECT_CONNECTOR);
>         if (!obj) {
> -               ret = -EINVAL;
> +               ret = -ENOENT;
>                 goto out;
>         }
>         connector = obj_to_connector(obj);
> @@ -1757,7 +1757,7 @@ int drm_mode_getencoder(struct drm_device *dev, void *data,
>         obj = drm_mode_object_find(dev, enc_resp->encoder_id,
>                                    DRM_MODE_OBJECT_ENCODER);
>         if (!obj) {
> -               ret = -EINVAL;
> +               ret = -ENOENT;
>                 goto out;
>         }
>         encoder = obj_to_encoder(obj);
> @@ -2141,7 +2141,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
>                                    DRM_MODE_OBJECT_CRTC);
>         if (!obj) {
>                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
> -               ret = -EINVAL;
> +               ret = -ENOENT;
>                 goto out;
>         }
>         crtc = obj_to_crtc(obj);
> @@ -2232,7 +2232,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
>                         if (!obj) {
>                                 DRM_DEBUG_KMS("Connector id %d unknown\n",
>                                                 out_id);
> -                               ret = -EINVAL;
> +                               ret = -ENOENT;
>                                 goto out;
>                         }
>                         connector = obj_to_connector(obj);
> @@ -2280,7 +2280,7 @@ static int drm_mode_cursor_common(struct drm_device *dev,
>         obj = drm_mode_object_find(dev, req->crtc_id, DRM_MODE_OBJECT_CRTC);
>         if (!obj) {
>                 DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
> -               return -EINVAL;
> +               return -ENOENT;
>         }
>         crtc = obj_to_crtc(obj);
>
> @@ -3059,7 +3059,7 @@ int drm_mode_getproperty_ioctl(struct drm_device *dev,
>         drm_modeset_lock_all(dev);
>         obj = drm_mode_object_find(dev, out_resp->prop_id, DRM_MODE_OBJECT_PROPERTY);
>         if (!obj) {
> -               ret = -EINVAL;
> +               ret = -ENOENT;
>                 goto done;
>         }
>         property = obj_to_property(obj);
> @@ -3188,7 +3188,7 @@ int drm_mode_getblob_ioctl(struct drm_device *dev,
>         drm_modeset_lock_all(dev);
>         obj = drm_mode_object_find(dev, out_resp->blob_id, DRM_MODE_OBJECT_BLOB);
>         if (!obj) {
> -               ret = -EINVAL;
> +               ret = -ENOENT;
>                 goto done;
>         }
>         blob = obj_to_blob(obj);
> @@ -3349,7 +3349,7 @@ int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
>
>         obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
>         if (!obj) {
> -               ret = -EINVAL;
> +               ret = -ENOENT;
>                 goto out;
>         }
>         if (!obj->properties) {
> @@ -3402,8 +3402,10 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
>         drm_modeset_lock_all(dev);
>
>         arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
> -       if (!arg_obj)
> +       if (!arg_obj) {
> +               ret = -ENOENT;
>                 goto out;
> +       }
>         if (!arg_obj->properties)
>                 goto out;
>
> @@ -3416,8 +3418,10 @@ int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
>
>         prop_obj = drm_mode_object_find(dev, arg->prop_id,
>                                         DRM_MODE_OBJECT_PROPERTY);
> -       if (!prop_obj)
> +       if (!prop_obj) {
> +               ret = -ENOENT;
>                 goto out;
> +       }
>         property = obj_to_property(prop_obj);
>
>         if (!drm_property_change_is_valid(property, arg->value))
> @@ -3502,7 +3506,7 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev,
>         drm_modeset_lock_all(dev);
>         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
>         if (!obj) {
> -               ret = -EINVAL;
> +               ret = -ENOENT;
>                 goto out;
>         }
>         crtc = obj_to_crtc(obj);
> @@ -3561,7 +3565,7 @@ int drm_mode_gamma_get_ioctl(struct drm_device *dev,
>         drm_modeset_lock_all(dev);
>         obj = drm_mode_object_find(dev, crtc_lut->crtc_id, DRM_MODE_OBJECT_CRTC);
>         if (!obj) {
> -               ret = -EINVAL;
> +               ret = -ENOENT;
>                 goto out;
>         }
>         crtc = obj_to_crtc(obj);
> @@ -3615,7 +3619,7 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
>
>         obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC);
>         if (!obj)
> -               return -EINVAL;
> +               return -ENOENT;
>         crtc = obj_to_crtc(obj);
>
>         mutex_lock(&crtc->mutex);
> --
> 1.8.1.5
>
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