[Intel-gfx] [PATCH] drm/i915: Squelch overzealous uncore reset WARN_ON

[shuang.he at intel.com]

Tested-By: PRC QA PRTS (Patch Regression Test System Contact: shuang.he at intel.com)
Task id: 5722
-------------------------------------Summary-------------------------------------
Platform          Delta          drm-intel-nightly          Series Applied
PNV                                  282/283              282/283
ILK              +3                 316/319              319/319
SNB              +2-3              322/346              321/346
IVB                 -2              382/384              380/384
BYT                                  296/296              296/296
HSW                 -1              351/354              350/354
BDW                                  318/333              318/333
-------------------------------------Detailed-------------------------------------
Platform  Test                                drm-intel-nightly          Series Applied
*ILK  igt_drv_suspend_debugfs-reader      DMESG_WARN(3, M26M37)      PASS(1, M37)
*ILK  igt_drv_suspend_forcewake      DMESG_WARN(6, M26M37)      PASS(1, M37)
*ILK  igt_gem_workarounds_suspend-resume      DMESG_WARN(3, M26M37)      PASS(1, M37)
 SNB  igt_kms_cursor_crc_cursor-size-change      NSPT(2, M22M35)PASS(2, M35)DMESG_FAIL(1, M35)      PASS(1, M35)
 SNB  igt_kms_flip_dpms-vs-vblank-race-interruptible      DMESG_WARN(2, M35)PASS(3, M22M35)      DMESG_WARN(1, M35)
 SNB  igt_kms_flip_event_leak      NSPT(2, M22M35)PASS(3, M35)      PASS(1, M35)
 SNB  igt_kms_flip_modeset-vs-vblank-race      DMESG_WARN(1, M35)PASS(2, M22M35)      DMESG_WARN(1, M35)
*SNB  igt_kms_flip_tiling_flip-changes-tiling      PASS(2, M22M35)      FAIL(1, M35)
 IVB  igt_gem_pwrite_pread_snooped-pwrite-blt-cpu_mmap-performance      DMESG_WARN(2, M34)PASS(6, M21M34)      DMESG_WARN(1, M34)
*IVB  igt_gem_storedw_batches_loop_normal      PASS(2, M21M34)      DMESG_WARN(1, M34)
*HSW  igt_gem_pwrite_pread_snooped-pwrite-blt-cpu_mmap-performance      PASS(3, M20)      DMESG_WARN(1, M40)
*HSW  igt_pm_rpm_debugfs-read      DMESG_WARN(3, M20)      INIT(1, M40)
Note: You need to pay more attention to line start with '*'