[Intel-gfx] [CI 2/2] drm/i915/gem: Pull phys pread/pwrite implementations to the backend

[Chris Wilson]

Quoting Chris Wilson (2020-11-05 15:49:34)
> Move the specialised interactions with the physical GEM object from the
> pread/pwrite ioctl handler into the phys backend.
> 

Fixes: c6790dc22312 ("drm/i915: Wean off drm_pci_alloc/drm_pci_free")
Testcase: igt/gem_pwrite/exhaustion
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Reviewed-by: Matthew Auld <matthew.auld at intel.com>
Cc: stable at vger.kernel.org
-Chris