Do you guys get the CI mails? This version has regressions. v1 did not. I don't
know what to trust.
On Tue, Feb 09, 2016 at 11:44:12AM -0800, Ben Widawsky wrote:
> This behavior of checking for a shmem backed GEM object was introduced here:
> commit 4c914c0c7c787b8f730128a8cdcca9c50b0784ab
> Author: Brad Volkin <bradley.d.volkin@xxxxxxxxx>
> Date: Tue Feb 18 10:15:45 2014 -0800
>
> drm/i915: Refactor shmem pread setup
>
> It is possible for an object to not be a shmem backed GEM object (for example
> userptr objects). An example of how we hit this failure can be found through
> copy_batch() in the command parser because we allocate a userptr object for the
> batch which contains privileged instructions. Userptr calls
> drm_gem_private_object_init() which explicitly sets the filp to none.
>
> NOTE: I manually retyped this from a test machine. So I haven't even compiled
> this exact patch.
>
> v2: Use same logic as from a2a4f916c2f (Kristian, Dave Gordon)
>
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Kristian Høgsberg <krh@xxxxxxxxxxxxx>
> Cc: Dave Gordon <david.s.gordon@xxxxxxxxx>
> Signed-off-by: Ben Widawsky <benjamin.widawsky@xxxxxxxxx>
> Tested-by: Jordan Justen <jordan.l.justen@xxxxxxxxx> (v1)
> Reviewed-by: Jordan Justen <jordan.l.justen@xxxxxxxxx> (v1)
> ---
> drivers/gpu/drm/i915/i915_gem.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index e9b19bc..7fd79b0 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -489,7 +489,7 @@ int i915_gem_obj_prepare_shmem_read(struct drm_i915_gem_object *obj,
>
> *needs_clflush = 0;
>
> - if (!obj->base.filp)
> + if (WARN_ON((obj->ops->flags & I915_GEM_OBJECT_HAS_STRUCT_PAGE) == 0))
> return -EINVAL;
>
> if (!(obj->base.read_domains & I915_GEM_DOMAIN_CPU)) {
> --
> 2.7.0
>
--
Ben Widawsky, Intel Open Source Technology Center
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