[Intel-gfx] [PATCH] drm: Kernel Crash in drm_unlock

[Daniel Vetter]

On Wed, Apr 15, 2015 at 02:22:54PM +0000, Antoine, Peter wrote:
> Hi Daniel,
> 
> I am having a look at this now, as have some time.
> 
> So, to sum up what I think you want.
> 1. Re-base and apply the patches (so that the known holes are closed in
> the Nouveau driver).
> 2. Add DRIVER_KMS_LEGACY_CONTEXT to include/drm/drmP.h
> 3. Add DRIVER_KMS_LEGACY_CONTEXT to .driver_features in file
> drivers/gpu/drm/nouveau/nouveau_drm.h.
> 4. Change all the hw_lock IOCTL functions to have:
>    +       if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT))
>    +               return -EINVAL;
>    +
> 5. Add an igt test, that would induce the crash on platforms that are
> not patched and have DRIVER_KMS_LEGACY_CONTEXT enabled?
> 
> Is this about right?

Sounds like a solid plan. When you send out the patch please also cc
dri-devel since this will all touch code outside of i915.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch