[Bug 104512] [i915]Failed to release pages: bind_count=1, pages_pin_count=1, pin_display=0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104512

--- Comment #8 from Victor Trac <victor.trac at gmail.com> ---
Seeing this on a Lenovo X1 Carbon running Archlinux after upgrading to
4.14.14-1. I logged into gnome-shell like usual. However, twice in the last 30
minutes my external monitor flashed black (Dell P2715Q, 4k at 60hz <- HDMI ->
Kensington SD4600P usb-c hub <- USB-C -> Laptop). dmesg has this output:

[  858.458724] Failed to release pages: bind_count=1, pages_pin_count=1,
pin_display=0
[  858.458814] ------------[ cut here ]------------
[  858.458884] WARNING: CPU: 0 PID: 151 at
drivers/gpu/drm/i915/i915_gem_userptr.c:89 cancel_userptr+0xdc/0xe0 [i915]
[  858.458886] Modules linked in: snd_usb_audio ax88179_178a snd_usbmidi_lib
usbnet mii snd_rawmidi snd_seq_device hid_generic rfcomm fuse ccm cmac
ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink nfnetlink xfrm_user
xfrm_algo iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype
iptable_filter xt_conntrack nf_nat nf_conntrack libcrc32c crc32c_generic
br_netfilter bridge stp llc joydev rmi_smbus uvcvideo rmi_core btusb
videobuf2_vmalloc btrtl videobuf2_memops videobuf2_v4l2 videobuf2_core videodev
mousedev media bnep wmi_bmof iTCO_wdt iTCO_vendor_support mei_wdt intel_rapl
x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_soc_skl
snd_soc_skl_ipc snd_soc_sst_ipc snd_soc_sst_dsp irqbypass snd_hda_codec_hdmi
intel_cstate intel_rapl_perf snd_hda_ext_core psmouse snd_soc_sst_match
[  858.458963]  input_leds snd_hda_codec_conexant snd_soc_core
snd_hda_codec_generic pcspkr tpm_crb snd_compress snd_pcm_dmaengine ac97_bus
arc4 nls_iso8859_1 nls_cp437 vfat fat iwlmvm mac80211 snd_hda_intel e1000e
snd_hda_codec snd_hda_core iwlwifi ptp pps_core snd_hwdep snd_pcm i2c_i801
snd_timer hci_uart btbcm ucsi_acpi thinkpad_acpi btqca btintel rtsx_pci_ms
nvram cfg80211 memstick typec_ucsi mei_me thermal typec wmi snd bluetooth mei
shpchp intel_pch_thermal soundcore ecdh_generic led_class rfkill battery
tpm_tis ac tpm_tis_core pinctrl_sunrisepoint pinctrl_intel crc16 i2c_hid tpm
intel_lpss_acpi intel_lpss evdev mac_hid acpi_pad sch_fq_codel vboxnetflt(O)
vboxnetadp(O) pci_stub vboxpci(O) vboxdrv(O) crypto_user acpi_call(O) ip_tables
x_tables btrfs xor zstd_decompress zstd_compress xxhash raid6_pq
[  858.459059]  algif_skcipher af_alg hid_logitech_hidpp hid_logitech_dj usbhid
hid dm_crypt dm_mod crct10dif_pclmul crc32_pclmul crc32c_intel
ghash_clmulni_intel pcbc rtsx_pci_sdmmc serio_raw mmc_core atkbd libps2
aesni_intel aes_x86_64 crypto_simd glue_helper xhci_pci cryptd xhci_hcd nvme
nvme_core rtsx_pci usbcore usb_common i8042 serio i915 video button intel_gtt
i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm
agpgart
[  858.459115] CPU: 0 PID: 151 Comm: kworker/u8:2 Tainted: G     U     O   
4.14.14-1-ARCH #1
[  858.459117] Hardware name: LENOVO 20HRCTO1WW/20HRCTO1WW, BIOS N1MET41W (1.26
) 11/09/2017
[  858.459168] Workqueue: i915-userptr-release cancel_userptr [i915]
[  858.459172] task: ffff9f338bd18f40 task.stack: ffffba4241e6c000
[  858.459216] RIP: 0010:cancel_userptr+0xdc/0xe0 [i915]
[  858.459218] RSP: 0018:ffffba4241e6fe80 EFLAGS: 00010282
[  858.459222] RAX: 0000000000000047 RBX: ffff9f309c217c80 RCX:
0000000000000000
[  858.459224] RDX: 0000000000000000 RSI: ffff9f33a1416598 RDI:
ffff9f33a1416598
[  858.459226] RBP: ffff9f309c217e30 R08: 0000000000000001 R09:
000000000000040a
[  858.459228] R10: fffff61a462440c0 R11: 0000000000000000 R12:
0000000000000000
[  858.459231] R13: 0000000000000000 R14: 0ffff9f336d25650 R15:
ffff9f338b838900
[  858.459234] FS:  0000000000000000(0000) GS:ffff9f33a1400000(0000)
knlGS:0000000000000000
[  858.459237] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  858.459239] CR2: 00007fade4e09320 CR3: 000000029e00a002 CR4:
00000000003606f0
[  858.459242] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[  858.459244] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[  858.459245] Call Trace:
[  858.459261]  process_one_work+0x1e0/0x420
[  858.459268]  worker_thread+0x2b/0x3d0
[  858.459274]  ? process_one_work+0x420/0x420
[  858.459279]  kthread+0x11a/0x130
[  858.459286]  ? kthread_create_on_node+0x70/0x70
[  858.459293]  ret_from_fork+0x32/0x40
[  858.459299] Code: fe 14 00 00 75 d7 8b 93 d0 01 00 00 8b 8b ac 01 00 00 48
c7 c7 a0 76 34 c0 8b b3 a4 01 00 00 c6 05 0e fe 14 00 01 e8 1f f1 e5 f5 <0f> ff
eb ae 0f 1f 44 00 00 41 57 41 56 ba 08 00 00 00 41 55 41 
[  858.459375] ---[ end trace 92670dba63e8a3b8 ]---

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