igt@gem_ctx_exec@basic-nohangcheck - incomplete - GEM_BUG_ON(!i915_request_on_hold(rq))

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7868/shard-skl2/igt@gem_ctx_exec@basic-nohangcheck.html#dmesg-warnings9

<0> [253.489707] kworker/-203     0d.H1 219411756us : __intel_context_retire: 0000:00:02.0 rcs0: context:15e8 retire
<0> [253.490338] kworker/-203     0..s. 219412100us : process_csb: 0000:00:02.0 rcs0: cs-irq head=3, tail=5
<0> [253.490948] kworker/-203     0..s. 219412105us : process_csb: 0000:00:02.0 rcs0: csb[4]: status=0x00000001:0x00000000
<0> [253.491585] kworker/-203     0..s. 219412111us : trace_ports: 0000:00:02.0 rcs0: promote { 5:2358!, 0:0 }
<0> [253.492194] kworker/-203     0..s. 219412120us : process_csb: 0000:00:02.0 rcs0: csb[5]: status=0x00000818:0x00000060
<0> [253.492828] kworker/-203     0..s. 219412125us : trace_ports: 0000:00:02.0 rcs0: completed { 5:2358!, 0:0 }
<0> [253.493438] kworker/-203     0..s. 219412143us : process_csb: 0000:00:02.0 bcs0: cs-irq head=5, tail=1
<0> [253.494038] kworker/-203     0..s. 219412147us : process_csb: 0000:00:02.0 bcs0: csb[0]: status=0x00000001:0x00000000
<0> [253.494671] kworker/-203     0..s. 219412155us : trace_ports: 0000:00:02.0 bcs0: promote { 7:130!, 0:0 }
<0> [253.495277] kworker/-203     0..s. 219412165us : process_csb: 0000:00:02.0 bcs0: csb[1]: status=0x00000818:0x00000020
<0> [253.495911] kworker/-203     0..s. 219412173us : trace_ports: 0000:00:02.0 bcs0: completed { 7:130!, 0:0 }
<0> [253.496579] kworker/-203     0.... 219412322us : i915_request_retire: 0000:00:02.0 vcs0: fence 9:138, current 138 
<0> [253.497268] kworker/-203     0.... 219412413us : i915_request_retire: 0000:00:02.0 rcs0: fence 5:2358, current 2358 
<0> [253.497918] kworker/-1050    1d..1 219413628us : execlists_unhold: __execlists_unhold:2483 GEM_BUG_ON(!i915_request_on_hold(rq))