On 11/06/2015 02:07 PM, Chris Wilson wrote:
On Fri, Nov 06, 2015 at 01:55:27PM -0800, yu....@intel.com wrote: > From: Alex Dai <yu....@intel.com> > > We keep a copy of GuC fw in a GEM obj. However its content is lost > if the GEM obj is evicted (igt/gem_evict_*). Therefore, the later > fw loading during GPU reset will fail. No, it's not. The bug is in sg_copy_buffer called by i915_gem_object_create_from_data introduced by yourselves.
My understanding is that sg_copy_from_buffer is used to copy data. Can you clarify why using this will cause such issue? I also did another experiment that always leaving the GEM obj pinned, then it's content never changed.
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