[Intel-gfx] [PATCH v2] tests/gem_userptr_blits: Race between close and invalidate

[Chris Wilson]

On Tue, Feb 03, 2015 at 08:13:56PM +0100, Michał Winiarski wrote:
> It was possible for invalidate range start mmu notifier callback to race
> with releasing userptr object. If the object is released prior to
> taking a spinlock in the callback, we'll encounter a null pointer
> dereference.
> 
> v2: Moved expressions inside igt_assert(), added mem barrier (Chris)
> 
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>

Lgtm,
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre