diff options
| author | Pei Zhang <pei.zhang@intel.com> | 2016-11-16 19:05:50 +0800 |
|---|---|---|
| committer | Zhenyu Wang <zhenyuw@linux.intel.com> | 2016-11-16 11:45:29 +0800 |
| commit | 0aaee4cc834261dcfbfb57559442777344ee8cb5 (patch) | |
| tree | ab6ddb9c80142acc0bc7292eeb9c501c284fcc36 /drivers/gpu/drm/i915/gvt/cmd_parser.c | |
| parent | a3614a868fd31b0e3ba670401a651ae89bb527aa (diff) | |
drm/i915/gvt: check workload empty before real scan
This patch will fix warning log print during command scan caused by
empty workload (ring head equals tail). This patch avoid going into
real scan process if workload is empty. It's guest's responsibility
to make sure if an empty workload is proper to submit to HW.
[v2] modify the patch description. It's a fix, not a w/a.
Signed-off-by: Pei Zhang <pei.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/gvt/cmd_parser.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/cmd_parser.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c index 1238b75fe3f8..d26a092c70e8 100644 --- a/drivers/gpu/drm/i915/gvt/cmd_parser.c +++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c @@ -2537,7 +2537,8 @@ static int scan_workload(struct intel_vgpu_workload *workload) s.rb_va = workload->shadow_ring_buffer_va; s.workload = workload; - if (bypass_scan_mask & (1 << workload->ring_id)) + if ((bypass_scan_mask & (1 << workload->ring_id)) || + gma_head == gma_tail) return 0; ret = ip_gma_set(&s, gma_head); |