Happened on fi-bsw-n3050

Detail	Value
Returncode	99
Time	0:01:03.911723
Stdout	
IGT-Version: 1.15-gf749a2d (x86_64) (Linux: 4.7.0-rc7-CI-Nightly_684+ x86_64)
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [busy+0x38b]
  #2 [run_poll+0x21f]
  #3 [__real_main227+0xfd]
  #4 [main+0x23]
  #5 [__libc_start_main+0xf0]
  #6 [_start+0x29]
Subtest basic-wait-before-default: FAIL (0.004s)
Test requirement not met in function gem_require_ring, file ioctl_wrappers.c:1450:
Test requirement: gem_has_ring(fd, ring)
Test requirement not met in function gem_require_ring, file ioctl_wrappers.c:1450:
Test requirement: gem_has_ring(fd, ring)
Test requirement not met in function gem_require_ring, file ioctl_wrappers.c:1450:
Test requirement: gem_has_ring(fd, ring)
Test requirement not met in function gem_require_ring, file ioctl_wrappers.c:1450:
Test requirement: gem_has_ring(fd, ring)
Test requirement not met in function gem_require_ring, file ioctl_wrappers.c:1450:
Test requirement: gem_has_ring(fd, ring)
Test requirement not met in function gem_require_ring, file ioctl_wrappers.c:1450:
Test requirement: gem_has_ring(fd, ring)
Stderr	
(prime_busy:10977) CRITICAL: Test assertion failure function busy, file prime_busy.c:138:
(prime_busy:10977) CRITICAL: Failed assertion: prime_busy(&pfd[SCRATCH], false)
Subtest basic-wait-before-default failed.
**** DEBUG ****
(prime_busy:10977) DEBUG: Test requirement passed: __gem_execbuf(fd, &execbuf) == 0
(prime_busy:10977) CRITICAL: Test assertion failure function busy, file prime_busy.c:138:
(prime_busy:10977) CRITICAL: Failed assertion: prime_busy(&pfd[SCRATCH], false)
****  END  ****
Environment	
PIGLIT_PLATFORM="mixed_glx_egl" PIGLIT_SOURCE_DIR="/opt/igt/piglit"
Command	/opt/igt/tests/prime_busy --run-subtest basic-wait-before-default
dmesg