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drm/i915/gvt: Don't submit request for error workload dispatch

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As vGPU shadow ctx is loaded with guest context state, arbitrarily
submitting request in error workload dispatch path would cause trouble.
So don't try to submit in error path now like in previous code.
This is to fix VM failure when GPU hang happens.

Fixes: f0e9943725 ("drm/i915/gvt: Fix workload request allocation before request add")
Reviewed-by: Xiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Zhenyu Wang 2019-03-01 15:55:04 +08:00
parent 9f49847732
commit f552e7bd02
1 changed files with 9 additions and 0 deletions
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9
drivers/gpu/drm/i915/gvt/scheduler.c
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@ -677,6 +677,7 @@ static int dispatch_workload(struct intel_vgpu_workload *workload)
{
struct intel_vgpu *vgpu = workload->vgpu;
struct drm_i915_private *dev_priv = vgpu->gvt->dev_priv;
struct i915_request *rq;
int ring_id = workload->ring_id;
int ret;
@ -702,6 +703,14 @@ static int dispatch_workload(struct intel_vgpu_workload *workload)
ret = prepare_workload(workload);
out:
if (ret) {
/* We might still need to add request with
* clean ctx to retire it properly..
*/
rq = fetch_and_zero(&workload->req);
i915_request_put(rq);
}
if (!IS_ERR_OR_NULL(workload->req)) {
gvt_dbg_sched("ring id %d submit workload to i915 %p\n",
ring_id, workload->req);