Quoting José Roberto de Souza (2018-09-17 22:22:44)
> All DRM_CLIENT capabilities are tied to KMS support, so returning
> -EOPNOTSUPP when KMS is not supported.
>
> v2: returning -EOPNOTSUPP(same value as posix ENOTSUP and available
> in uapi) instead of -ENOTSUPP
>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_ioctl.c | 3 +++
> drivers/gpu/drm/i915/i915_perf.c | 2 +-
> 2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
> index 60dfbfae6a02..c0de628c194c 100644
> --- a/drivers/gpu/drm/drm_ioctl.c
> +++ b/drivers/gpu/drm/drm_ioctl.c
> @@ -306,6 +306,9 @@ drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
> {
> struct drm_set_client_cap *req = data;
>
I liked Daniel's comment suggestion.
> + if (!drm_core_check_feature(dev, DRIVER_MODESET))
> + return -EOPNOTSUPP;
> +
> switch (req->capability) {
> case DRM_CLIENT_CAP_STEREO_3D:
> if (req->value > 1)
> diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
> index 664b96bb65a3..c1edd1e69a3e 100644
> --- a/drivers/gpu/drm/i915/i915_perf.c
> +++ b/drivers/gpu/drm/i915/i915_perf.c
> @@ -2817,7 +2817,7 @@ int i915_perf_open_ioctl(struct drm_device *dev, void *data,
>
> if (!dev_priv->perf.initialized) {
> DRM_DEBUG("i915 perf interface not available for this system\n");
> - return -ENOTSUPP;
> + return -EOPNOTSUPP;
Better served as a separate patch, so it can be applied to different
trees.
-Chris
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