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drm/i915/gvt: Refine error handling in dispatch_workload

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When an error occurs in dispatch_workload, this patch is to do the
proper cleanup and rollback to the original states before the workload
is abandoned.

v2:
- split the mixed several error paths for better review. (Zhenyu)

v3:
- original PTR_ERR(cs) is good and code cleanup. (Zhenyu)

v4:
- reuse the existing i915_add_request for error handling. (Zhenyu)

v5:
- remove the duplicate error handling release_shadow_wa_ctx and
  move the engine->context_unpin upper. (Zhenyu)

v6:
- keep the old label "out". (Zhenyu)

Signed-off-by: fred gao <fred.gao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
fred gao 2017-08-18 15:41:10 +08:00 committed by Zhenyu Wang
parent 46b441efa3
commit 0f43702a33
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/i915/gvt/scheduler.c
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@ -342,8 +342,10 @@ static int dispatch_workload(struct intel_vgpu_workload *workload)
if (workload->prepare) {
ret = workload->prepare(workload);
if (ret)
if (ret) {
engine->context_unpin(engine, shadow_ctx);
goto out;
}
}
out: