Commit 0aaee4cc authored Nov 16, 2016 by Pei Zhang Committed by Zhenyu Wang Nov 16, 2016

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>

parent a3614a86

drivers/gpu/drm/i915/gvt/cmd_parser.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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);