drm/i915/gvt: Add VM healthy check for submit_context
When a scan error occurs in submit_context, this patch is to decrease the mm ref count and free the workload struct before the workload is abandoned. v2: - submit_context related code should be combined together. (Zhenyu) v3: - free all the unsubmitted workloads. (Zhenyu) v4: - refine the clean path. (Zhenyu) v5: - polish the title. (Zhenyu) Signed-off-by: Nfred gao <fred.gao@intel.com> Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>
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