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SubjectRe: [PATCH v2 5/6] virtio-gpu: add basic prime support
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> > +int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
> > + struct vm_area_struct *area)
> > +{
> > + WARN_ONCE(1, "not implemented");
> > + return ENOSYS;
>
> This can get called by userspace, so please don't WARN here. Also missing
> negate sign:
>
> return -ENOSYS;

Hmm now checkpatch throws a warning at me:

<quote>
WARNING: ENOSYS means 'invalid syscall nr' and nothing else
#12: FILE: drivers/gpu/drm/virtio/virtgpu_prime.c:70:
+ return -ENOSYS;
</quote>

I guess I should use something else then (here and elsewhere in the
file)? Maybe -EINVAL? Other suggestions?

thanks,
Gerd




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