Few testcases - dmesg-warn - *ERROR* Lost access to MMIO BAR; all registers now read back as 0xFFFFFFFF!

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_12310/bat-dg2-11/igt@i915_selftest@live@migrate.html

<7> [344.932258] [drm:drm_client_modeset_probe] picking CRTCs for 16384x16384 config
<7> [344.932279] i915 0000:03:00.0: [drm:__drm_fb_helper_initial_config_and_unlock [drm_kms_helper]] test CRTC 0 primary plane
<7> [344.932294] i915 0000:03:00.0: [drm:__drm_fb_helper_initial_config_and_unlock [drm_kms_helper]] test CRTC 1 primary plane
<7> [344.932308] i915 0000:03:00.0: [drm:__drm_fb_helper_initial_config_and_unlock [drm_kms_helper]] test CRTC 2 primary plane
<7> [344.932321] i915 0000:03:00.0: [drm:__drm_fb_helper_initial_config_and_unlock [drm_kms_helper]] test CRTC 3 primary plane
<6> [344.932334] i915 0000:03:00.0: [drm] Cannot find any crtc or sizes
<6> [345.308300] i915: Running intel_migrate_live_selftests/live_migrate_clear
<6> [346.038382] i915: Running intel_migrate_live_selftests/thread_migrate_copy
<3> [346.123340] i915 0000:03:00.0: [drm] *ERROR* Lost access to MMIO BAR; all registers now read back as 0xFFFFFFFF!
<7> [346.132394] i915 0000:03:00.0: [drm:fwtable_read32 [i915]] Unclaimed access detected before read from register 0xa504
<4> [346.281201] hrtimer: interrupt took 4128229 ns
<6> [346.456716] i915: Running intel_migrate_live_selftests/thread_migrate_clear
<6> [347.379791] i915: Running intel_migrate_live_selftests/thread_global_copy
<6> [347.676764] i915: Running intel_migrate_live_selftests/thread_global_clear
<6> [347.731720] perf: interrupt took too long (3171 > 2500), lowering kernel.perf_event_max_sample_rate to 63000
<7> [348.433361] i915 0000:03:00.0: [drm:intel_power_well_enable [i915]] enabling DC_off
<7> [348.433646] i915 0000:03:00.0: [drm:gen9_set_dc_state.part.15 [i915]] Setting DC state from 01 to 00
<7> [348.434038] i915 0000:03:00.0: [drm:intel_power_well_enable [i915]] enabling PW_2
<7> [348.434191] i915 0000:03:00.0: [drm:intel_power_well_enable [i915]] enabling PW_A
<7> [348.434331] i915 0000:03:00.0: [drm:intel_power_well_enable [i915]] enabling PW_B
<7> [348.434472] i915 0000:03:00.0: [drm:intel_power_well_enable [i915]] enabling PW_C
<7> [348.434615] i915 0000:03:00.0: [drm:intel_power_well_enable [i915]] enabling PW_D
<7> [348.437773] intel_gt_set_wedged called from intel_gt_set_wedged_on_fini+0x9/0x30 [i915]
<7> [348.517121] i915 0000:03:00.0: [drm:drm_client_release] drm_fb_helper
<4> [348.573806] i915: probe of 0000:03:00.0 failed with error -25