[Intel-gfx] [PATCH 2/2] drm: WARN if drm_handle_vblank is called errornously

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 5807
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                 -3              277/277              274/277
ILK                                  313/313              313/313
SNB                 -23              309/309              286/309
IVB                                  382/382              382/382
BYT                                  296/296              296/296
HSW                 -1              425/425              424/425
BDW                 -1              318/318              317/318
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
 PNV  igt_gem_userptr_blits_coherency-sync      NO_RESULT(1)CRASH(8)NRUN(1)PASS(8)      CRASH(2)
 PNV  igt_gem_userptr_blits_coherency-unsync      CRASH(5)NRUN(1)PASS(6)      CRASH(1)PASS(1)
*PNV  igt_gem_userptr_blits_forked-access      PASS(3)      FAIL(1)PASS(1)
*SNB  igt_gem_fence_thrash_bo-copy      PASS(2)      DMESG_WARN(1)PASS(1)
 SNB  igt_kms_pipe_crc_basic_read-crc-pipe-A      DMESG_WARN(1)PASS(2)      DMESG_WARN(2)
 SNB  igt_kms_pipe_crc_basic_read-crc-pipe-A-frame-sequence      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_pipe_crc_basic_read-crc-pipe-B      DMESG_WARN(1)PASS(2)      DMESG_WARN(2)
 SNB  igt_kms_pipe_crc_basic_read-crc-pipe-B-frame-sequence      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-panning-bottom-right-pipe-A-plane-1      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-panning-bottom-right-pipe-A-plane-2      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-panning-bottom-right-pipe-B-plane-1      DMESG_WARN(1)PASS(2)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-panning-bottom-right-pipe-B-plane-2      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-panning-top-left-pipe-A-plane-1      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-panning-top-left-pipe-A-plane-2      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-panning-top-left-pipe-B-plane-1      DMESG_WARN(1)PASS(2)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-panning-top-left-pipe-B-plane-2      DMESG_WARN(1)PASS(17)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-position-covered-pipe-A-plane-2      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-position-covered-pipe-B-plane-1      DMESG_WARN(1)PASS(2)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-position-covered-pipe-B-plane-2      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-position-hole-pipe-A-plane-1      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-position-hole-pipe-A-plane-2      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-position-hole-pipe-B-plane-1      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_kms_plane_plane-position-hole-pipe-B-plane-2      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_pm_rpm_debugfs-forcewake-user      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_pm_rpm_gem-idle      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 SNB  igt_pm_rpm_reg-read-ioctl      DMESG_WARN(1)PASS(1)      DMESG_WARN(2)
 HSW  igt_kms_flip_plain-flip-fb-recreate      TIMEOUT(4)PASS(3)      TIMEOUT(1)PASS(1)
*BDW  igt_gem_gtt_hog      PASS(23)      DMESG_WARN(1)PASS(1)
Note: You need to pay more attention to line start with '*'