[Bug 104336] New: Unclaimed read from register 4.14.2

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Dec 19 14:40:17 UTC 2017 

https://bugs.freedesktop.org/show_bug.cgi?id=104336

            Bug ID: 104336
           Summary: Unclaimed read from register 4.14.2
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: lionel.g.landwerlin at linux.intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Had this backtrace in my dmesg a few minutes before my machine hanged (not sure
it's related) :

Dec 18 23:07:44 delly kernel: [ 8714.799040] Unclaimed read from register
0x43208
Dec 18 23:07:44 delly kernel: [ 8714.799071] ------------[ cut here
]------------
Dec 18 23:07:44 delly kernel: [ 8714.799097] WARNING: CPU: 2 PID: 8535 at
/build/linux-ZSFHrj/linux-4.14.2/drivers/gpu/drm/i915/intel_uncore.c:792
__unclaimed_reg_debug+0x4e/0x60 [i915]
Dec 18 23:07:44 delly kernel: [ 8714.799098] Modules linked in: tun ctr ccm
fuse rfcomm cmac uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2
pci_stub videobuf2_core vboxpci(O) videodev vboxnetadp(O) btusb media btrtl
btbcm vboxnetflt(O) arc4 ebtable_filter vboxdrv(O) ebtables ip6table_filter
ip6_tables iptable_filter devlink cpufreq_powersave cpufreq_conservative
cpufreq_userspace bnep hid_multitouch msr snd_hda_codec_hdmi
snd_hda_codec_realtek snd_hda_codec_generic binfmt_misc nls_ascii nls_cp437
vfat fat dell_wmi dell_laptop dell_smbios i2c_designware_platform wmi_bmof
i2c_designware_core dcdbas efi_pstore snd_soc_skl snd_soc_skl_ipc
snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core snd_soc_sst_match snd_soc_core
snd_compress intel_rapl x86_pkg_temp_thermal intel_powerclamp ath10k_pci
coretemp ath10k_core kvm_intel ath
Dec 18 23:07:44 delly kernel: [ 8714.799126]  kvm mac80211 snd_hda_intel
irqbypass intel_cstate intel_uncore evdev intel_rapl_perf joydev hci_uart
serio_raw snd_hda_codec btqca rtsx_pci_ms btintel bluetooth efivars pcspkr
memstick cfg80211 snd_hda_core iTCO_wdt snd_hwdep i915 iTCO_vendor_support
snd_pcm snd_timer snd idma64 soundcore drm_kms_helper drm mei_me ucsi_acpi
processor_thermal_device shpchp i2c_algo_bit mei intel_lpss_pci typec_ucsi
intel_soc_dts_iosf intel_pch_thermal typec wmi drbg battery soc_button_array
intel_vbtn ansi_cprng ecdh_generic rfkill video intel_lpss_acpi intel_lpss
int3403_thermal int340x_thermal_zone int3400_thermal acpi_thermal_rel intel_hid
sparse_keymap acpi_pad acpi_als kfifo_buf ac industrialio button parport_pc
ppdev lp parport sunrpc efivarfs ip_tables x_tables autofs4 ext4 crc16 mbcache
jbd2 crc32c_generic
Dec 18 23:07:44 delly kernel: [ 8714.799160]  fscrypto ecb algif_skcipher
af_alg usbhid dm_crypt dm_mod crct10dif_pclmul crc32_pclmul crc32c_intel
ghash_clmulni_intel pcbc rtsx_pci_sdmmc mmc_core aesni_intel aes_x86_64
crypto_simd glue_helper cryptd psmouse rtsx_pci mfd_core nvme nvme_core
i2c_i801 xhci_pci xhci_hcd usbcore usb_common thermal i2c_hid hid
Dec 18 23:07:44 delly kernel: [ 8714.799177] CPU: 2 PID: 8535 Comm:
kworker/u8:0 Tainted: G        W  O    4.14.0-1-amd64 #1 Debian 4.14.2-1
Dec 18 23:07:44 delly kernel: [ 8714.799178] Hardware name: Dell Inc. XPS 13
9360/0839Y6, BIOS 2.3.1 10/03/2017
Dec 18 23:07:44 delly kernel: [ 8714.799198] Workqueue: events_unbound
intel_atomic_commit_work [i915]
Dec 18 23:07:44 delly kernel: [ 8714.799200] task: ffff952251460000 task.stack:
ffffa094c3d14000
Dec 18 23:07:44 delly kernel: [ 8714.799217] RIP:
0010:__unclaimed_reg_debug+0x4e/0x60 [i915]
Dec 18 23:07:44 delly kernel: [ 8714.799217] RSP: 0000:ffffa094c3d17bb8 EFLAGS:
00010086
Dec 18 23:07:44 delly kernel: [ 8714.799219] RAX: 0000000000000024 RBX:
0000000000000000 RCX: 0000000000000000
Dec 18 23:07:44 delly kernel: [ 8714.799219] RDX: 0000000000000000 RSI:
ffff9523fe50deb8 RDI: ffff9523fe50deb8
Dec 18 23:07:44 delly kernel: [ 8714.799220] RBP: ffffa094c3d17bd0 R08:
0000000000000001 R09: 000000000000040c
Dec 18 23:07:44 delly kernel: [ 8714.799221] R10: 0000000000000000 R11:
0000000000000000 R12: 0000000000043208
Dec 18 23:07:44 delly kernel: [ 8714.799221] R13: 0000000000000001 R14:
0000000000000001 R15: 0000000090000000
Dec 18 23:07:44 delly kernel: [ 8714.799223] FS:  0000000000000000(0000)
GS:ffff9523fe500000(0000) knlGS:0000000000000000
Dec 18 23:07:44 delly kernel: [ 8714.799223] CS:  0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Dec 18 23:07:44 delly kernel: [ 8714.799224] CR2: 00007f3973fff000 CR3:
0000000386409003 CR4: 00000000003606e0
Dec 18 23:07:44 delly kernel: [ 8714.799225] Call Trace:
Dec 18 23:07:44 delly kernel: [ 8714.799244]  fwtable_read32+0x17a/0x1d0 [i915]
Dec 18 23:07:44 delly kernel: [ 8714.799262]  intel_fbc_hw_deactivate+0xbe/0xe0
[i915]
Dec 18 23:07:44 delly kernel: [ 8714.799278]  intel_fbc_deactivate+0x34/0x50
[i915]
Dec 18 23:07:44 delly kernel: [ 8714.799293]  intel_fbc_pre_update+0x92/0x170
[i915]
Dec 18 23:07:44 delly kernel: [ 8714.799309]  intel_pre_plane_update+0x6a/0x130
[i915]
Dec 18 23:07:44 delly kernel: [ 8714.799324]  intel_update_crtc+0xc1/0xe0
[i915]
Dec 18 23:07:44 delly kernel: [ 8714.799338]  skl_update_crtcs+0x268/0x290
[i915]
Dec 18 23:07:44 delly kernel: [ 8714.799353] 
intel_atomic_commit_tail+0x25c/0xf80 [i915]
Dec 18 23:07:44 delly kernel: [ 8714.799356]  ? finish_task_switch+0x7b/0x200
Dec 18 23:07:44 delly kernel: [ 8714.799370] 
intel_atomic_commit_work+0x12/0x20 [i915]
Dec 18 23:07:44 delly kernel: [ 8714.799372]  process_one_work+0x198/0x390
Dec 18 23:07:44 delly kernel: [ 8714.799374]  worker_thread+0x35/0x3c0
Dec 18 23:07:44 delly kernel: [ 8714.799376]  kthread+0x125/0x140
Dec 18 23:07:44 delly kernel: [ 8714.799377]  ? process_one_work+0x390/0x390
Dec 18 23:07:44 delly kernel: [ 8714.799378]  ?
kthread_create_on_node+0x70/0x70
Dec 18 23:07:44 delly kernel: [ 8714.799381]  ret_from_fork+0x25/0x30
Dec 18 23:07:44 delly kernel: [ 8714.799382] Code: 5b 41 5c 41 5d 5d c3 45 84
ed 48 c7 c0 4e c4 a5 c0 48 c7 c6 44 c4 a5 c0 48 0f 44 f0 44 89 e2 48 c7 c7 57
c4 a5 c0 e8 03 d0 d0 f4 <0f> ff 83 2d 4d e0 0b 00 01 5b 41 5c 41 5d 5d c3 66 90
0f 1f 44 
Dec 18 23:07:44 delly kernel: [ 8714.799407] ---[ end trace 56a6444e19dde321
]---

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