FYI, we noticed the below changes on

git://anongit.freedesktop.org/drm-intel for-linux-next
commit 8be6ca8537e1230da8e92c753df4125151a3f6b1 ("drm/i915: Also call frontbuffer flip when disabling planes.")


<3>[   88.957989] x86/PAT: bmc-watchdog:523 map pfn expected mapping type uncached-minus for [mem 0xbac69000-0xbac69fff], got write-back
<3>[   88.972289] x86/PAT: bmc-watchdog:523 map pfn expected mapping type uncached-minus for [mem 0xbac69000-0xbac69fff], got write-back
<4>[   90.353612] ------------[ cut here ]------------
<4>[   90.358328] WARNING: CPU: 0 PID: 629 at drivers/gpu/drm/i915/intel_uncore.c:70 assert_device_not_suspended+0x53/0x60 [i915]()
<4>[   90.372286] Device suspended
<4>[   90.375207] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver netconsole btrfs xor raid6_pq sg sd_mod snd_hda_codec_hdmi ata_generic snd_hda_codec_realtek snd_hda_codec_generic pata_acpi x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper i915 cryptd ppdev eeepc_wmi asus_wmi sparse_keymap snd_hda_intel snd_hda_codec microcode snd_hda_core drm_kms_helper snd_hwdep snd_pcm rfkill ata_piix pata_via pcspkr snd_timer i2c_i801 libata snd soundcore serio_raw shpchp drm wmi parport_pc parport tpm_infineon video
<4>[   90.432069] CPU: 0 PID: 629 Comm: pm_rpm Not tainted 4.2.0-rc6-00569-g8be6ca8 #1
<4>[   90.439530] Hardware name: System manufacturer System Product Name/P8H67-M PRO, BIOS 1002 04/01/2011
<47>
[   90.439898] systemd-journald[131]: Compressed data object 624 -> 468
<4>[   90.455193]  ffffffffa0438010 ffff88009956b9a8 ffffffff8189df6e ffff8801bfa11578
<4>[   90.462744]  ffff88009956b9f8 ffff88009956b9e8 ffffffff8107348a ffff88009956b9e8
<4>[   90.470339]  ffff8801bd1d0080 0000000000043208 ffff8801bd1d7e78 0000000000043208
<4>[   90.477903] Call Trace:
<4>[   90.480362]  [<ffffffff8189df6e>] dump_stack+0x4c/0x65
<4>[   90.485583]  [<ffffffff8107348a>] warn_slowpath_common+0x8a/0xc0
<4>[   90.491661]  [<ffffffff81073506>] warn_slowpath_fmt+0x46/0x50
<4>[   90.497470]  [<ffffffffa03b3483>] assert_device_not_suspended+0x53/0x60 [i915]
<4>[   90.505487]  [<ffffffffa03b63f8>] gen6_read32+0x38/0x190 [i915]
<4>[   90.511474]  [<ffffffffa03e20c8>] ilk_fbc_disable+0x28/0x70 [i915]
<4>[   90.517769]  [<ffffffffa03e194d>] __intel_fbc_disable+0x2d/0x60 [i915]
<4>[   90.524358]  [<ffffffffa03e2c1c>] intel_fbc_flush+0x5c/0x70 [i915]
<4>[   90.530626]  [<ffffffffa03e345e>] intel_frontbuffer_flush+0x6e/0x80 [i915]
<4>[   90.537598]  [<ffffffffa03e373c>] intel_frontbuffer_flip+0x4c/0x60 [i915]
<4>[   90.544517]  [<ffffffffa03d7a52>] intel_atomic_commit+0x222/0x600 [i915]
<4>[   90.551298]  [<ffffffffa0078077>] drm_atomic_commit+0x37/0x60 [drm]
<4>[   90.557641]  [<ffffffffa01f96a4>] drm_atomic_helper_set_config+0x1c4/0x430 [drm_kms_helper]
<4>[   90.566127]  [<ffffffffa00682a6>] drm_mode_set_config_internal+0x66/0x100 [drm]
<4>[   90.573514]  [<ffffffffa006c2c9>] drm_mode_setcrtc+0x189/0x4e0 [drm]
<4>[   90.579931]  [<ffffffffa005d6c6>] drm_ioctl+0x196/0x640 [drm]
<4>[   90.585746]  [<ffffffff811f0ee1>] do_vfs_ioctl+0x301/0x560
<4>[   90.591290]  [<ffffffff8139502d>] ? selinux_file_ioctl+0x4d/0xc0
<4>[   90.597400]  [<ffffffff8138e383>] ? security_file_ioctl+0x43/0x60
<4>[   90.603575]  [<ffffffff811f11b9>] SyS_ioctl+0x79/0x90
<4>[   90.608684]  [<ffffffff818a5aae>] entry_SYSCALL_64_fastpath+0x12/0x71
<4>[   90.615212] ---[ end trace ca2dc2b969c553ed ]---
<4>[   90.615212] ---[ end trace ca2dc2b969c553ed ]---


To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Ying Huang