igt@i915_selftest@live_blt - igt_(copy|fill)_blt failed with error -ENOSPC

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7486/fi-bsw-nick/igt@i915_selftest@live_blt.html

(i915_selftest:3749) igt_kmod-WARNING: i915/i915_gem_object_blt_live_selftests: igt_fill_blt failed with error -28
(i915_selftest:3749) igt_kmod-WARNING: [drm:intel_power_well_enable [i915]] enabling always-on
(i915_selftest:3749) igt_kmod-WARNING: [drm:intel_power_well_enable [i915]] enabling display
(i915_selftest:3749) igt_kmod-WARNING: [drm:intel_vga_redisable_power_on [i915]] Something enabled VGA plane, disabling it
(i915_selftest:3749) igt_kmod-WARNING: [drm:intel_power_well_enable [i915]] enabling dpio-common-bc
(i915_selftest:3749) igt_kmod-WARNING: [drm:chv_dpio_cmn_power_well_enable [i915]] Enabled DPIO PHY0 (PHY_CONTROL=0x050007fd)
(i915_selftest:3749) igt_kmod-WARNING: [drm:intel_power_well_enable [i915]] enabling dpio-common-d
(i915_selftest:3749) igt_kmod-WARNING: [drm:chv_dpio_cmn_power_well_enable [i915]] Enabled DPIO PHY1 (PHY_CONTROL=0x050007ff)
(i915_selftest:3749) igt_kmod-WARNING: i915: probe of 0000:00:02.0 failed with error -28
(i915_selftest:3749) igt_kmod-CRITICAL: Test assertion failure function igt_kselftest_execute, file ../lib/igt_kmod.c:588:
(i915_selftest:3749) igt_kmod-CRITICAL: Failed assertion: err == 0
(i915_selftest:3749) igt_kmod-CRITICAL: kselftest "i915 igt__34__live_blt=1 live_selftests=-1 disable_display=1 st_filter=" failed: No space left on device [28]
(i915_selftest:3749) igt_core-INFO: Stack trace:
(i915_selftest:3749) igt_core-INFO:   #0 ../lib/igt_core.c:1877 __igt_fail_assert()
(i915_selftest:3749) igt_core-INFO:   #1 [igt_kselftest_execute+0x2e5]
(i915_selftest:3749) igt_core-INFO:   #2 ../lib/igt_kmod.c:622 igt_kselftests()
(i915_selftest:3749) igt_core-INFO:   #3 /usr/include/x86_64-linux-gnu/bits/stdio2.h:64 __real_main29()
(i915_selftest:3749) igt_core-INFO:   #4 ../tests/i915/i915_selftest.c:29 main()
(i915_selftest:3749) igt_core-INFO:   #5 ../csu/libc-start.c:344 __libc_start_main()
(i915_selftest:3749) igt_core-INFO:   #6 [_start+0x2a]
****  END  ****
Subtest live_blt: FAIL (1.647s)