WARNING: CPU: 1 PID: 2914 at drivers/gpu/drm/drm_atomic.c:889 drm_atomic_get_property+0x244/0x2d0()

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Hi Daniel,

just triggered the below, this time on the Intel box. Maybe related to
the locking fun from a couple weeks ago?

I'm doing

$ powertop --auto-tune

---

...
[    5.118418] EXT4-fs (sdb3): mounted filesystem with ordered data mode. Opts: (null)
[    5.209310] EXT4-fs (sda4): mounted filesystem with ordered data mode. Opts: (null)
[    5.770286] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[    5.786260] psmouse serio2: trackpoint: IBM TrackPoint firmware: 0x0e, buttons: 3/3
[    5.981207] input: TPPS/2 IBM TrackPoint as /devices/platform/i8042/serio1/serio2/input/input7
[    6.081468] input: ACPI Virtual Keyboard Device as /devices/virtual/input/input19
[    7.283179] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
[    7.284652] e1000e 0000:00:19.0 eth0: 10/100 speed: disabling TSO
[    7.286295] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   36.269136] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   39.673321] ------------[ cut here ]------------
[   39.673335] WARNING: CPU: 1 PID: 2914 at drivers/gpu/drm/drm_atomic.c:889 drm_atomic_get_property+0x244/0x2d0()
[   39.673338] Modules linked in: msr cpufreq_powersave cpufreq_userspace cpufreq_conservative cpufreq_stats binfmt_misc uinput ext2 vfat fat fuse loop dm_crypt dm_mod hid_generic usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support arc4 x86_pkg_temp_thermal coretemp kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel hmac drbg snd_hda_intel aesni_intel sdhci_pci snd_hda_codec aes_x86_64 glue_helper lrw sdhci gf128mul ablk_helper cryptd mmc_core snd_hwdep snd_hda_core pcspkr sg serio_raw snd_pcm lpc_ich i2c_i801 mfd_core snd_timer thinkpad_acpi wmi nvram snd battery ac soundcore e1000e ehci_pci led_class xhci_pci xhci_hcd ehci_hcd processor thermal [last unloaded: cfg80211]
[   39.673430] CPU: 1 PID: 2914 Comm: powertop Not tainted 4.3.0-rc5+ #1
[   39.673433] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
[   39.673436]  ffffffff81aacd61 ffff8800c9953c88 ffffffff812f558c 0000000000000000
[   39.673442]  ffff8800c9953cc0 ffffffff8105d346 ffff8800ca5e8828 ffff880213586480
[   39.673448]  ffff8800ca5e8800 ffff880212d5af00 ffff880212900000 ffff8800c9953cd0
[   39.673453] Call Trace:
[   39.673462]  [<ffffffff812f558c>] dump_stack+0x4e/0x82
[   39.673467]  [<ffffffff8105d346>] warn_slowpath_common+0x86/0xc0
[   39.673470]  [<ffffffff8105d43a>] warn_slowpath_null+0x1a/0x20
[   39.673474]  [<ffffffff8140b494>] drm_atomic_get_property+0x244/0x2d0
[   39.673480]  [<ffffffff813f8aec>] drm_object_property_get_value+0x6c/0x70
[   39.673484]  [<ffffffff813f6aef>] dpms_show+0x2f/0x70
[   39.673489]  [<ffffffff814c7af0>] dev_attr_show+0x20/0x50
[   39.673496]  [<ffffffff812331e1>] ? sysfs_file_ops+0x41/0x60
[   39.673500]  [<ffffffff812334f8>] sysfs_kf_seq_show+0xa8/0x110
[   39.673505]  [<ffffffff81231bc6>] kernfs_seq_show+0x26/0x30
[   39.673510]  [<ffffffff811e0549>] seq_read+0xe9/0x3c0
[   39.673515]  [<ffffffff81232597>] kernfs_fop_read+0x127/0x170
[   39.673521]  [<ffffffff810ab7d9>] ? __lock_is_held+0x49/0x70
[   39.673526]  [<ffffffff811b8fe8>] __vfs_read+0x28/0xd0
[   39.673531]  [<ffffffff811c9203>] ? putname+0x53/0x60
[   39.673537]  [<ffffffff810ca866>] ? rcu_read_lock_sched_held+0x86/0x90
[   39.673543]  [<ffffffff811a7ae2>] ? kmem_cache_free+0x242/0x2b0
[   39.673547]  [<ffffffff811b95f6>] vfs_read+0x86/0x130
[   39.673551]  [<ffffffff811ba399>] SyS_read+0x49/0xa0
[   39.673557]  [<ffffffff816cd81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[   39.673561] ---[ end trace a2c68cbdb04620ef ]---
[   76.694895] ------------[ cut here ]------------
[   76.694910] WARNING: CPU: 0 PID: 2960 at drivers/gpu/drm/drm_atomic.c:889 drm_atomic_get_property+0x244/0x2d0()
[   76.694914] Modules linked in: msr cpufreq_powersave cpufreq_userspace cpufreq_conservative cpufreq_stats binfmt_misc uinput ext2 vfat fat fuse loop dm_crypt dm_mod hid_generic usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support arc4 x86_pkg_temp_thermal coretemp kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel hmac drbg snd_hda_intel aesni_intel sdhci_pci snd_hda_codec aes_x86_64 glue_helper lrw sdhci gf128mul ablk_helper cryptd mmc_core snd_hwdep snd_hda_core pcspkr sg serio_raw snd_pcm lpc_ich i2c_i801 mfd_core snd_timer thinkpad_acpi wmi nvram snd battery ac soundcore e1000e ehci_pci led_class xhci_pci xhci_hcd ehci_hcd processor thermal [last unloaded: cfg80211]
[   76.695014] CPU: 0 PID: 2960 Comm: powertop Tainted: G        W       4.3.0-rc5+ #1
[   76.695017] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
[   76.695020]  ffffffff81aacd61 ffff880211b73c88 ffffffff812f558c 0000000000000000
[   76.695027]  ffff880211b73cc0 ffffffff8105d346 ffff8800ca5e8828 ffff880213586480
[   76.695033]  ffff8800ca5e8800 ffff8800c9bf2100 ffff880211f75000 ffff880211b73cd0
[   76.695040] Call Trace:
[   76.695050]  [<ffffffff812f558c>] dump_stack+0x4e/0x82
[   76.695055]  [<ffffffff8105d346>] warn_slowpath_common+0x86/0xc0
[   76.695059]  [<ffffffff8105d43a>] warn_slowpath_null+0x1a/0x20
[   76.695063]  [<ffffffff8140b494>] drm_atomic_get_property+0x244/0x2d0
[   76.695069]  [<ffffffff813f8aec>] drm_object_property_get_value+0x6c/0x70
[   76.695073]  [<ffffffff813f6aef>] dpms_show+0x2f/0x70
[   76.695078]  [<ffffffff814c7af0>] dev_attr_show+0x20/0x50
[   76.695086]  [<ffffffff812331e1>] ? sysfs_file_ops+0x41/0x60
[   76.695090]  [<ffffffff812334f8>] sysfs_kf_seq_show+0xa8/0x110
[   76.695096]  [<ffffffff81231bc6>] kernfs_seq_show+0x26/0x30
[   76.695101]  [<ffffffff811e0549>] seq_read+0xe9/0x3c0
[   76.695106]  [<ffffffff81232597>] kernfs_fop_read+0x127/0x170
[   76.695112]  [<ffffffff810ab7d9>] ? __lock_is_held+0x49/0x70
[   76.695118]  [<ffffffff811b8fe8>] __vfs_read+0x28/0xd0
[   76.695123]  [<ffffffff811c9203>] ? putname+0x53/0x60
[   76.695130]  [<ffffffff810ca866>] ? rcu_read_lock_sched_held+0x86/0x90
[   76.695135]  [<ffffffff811a7ae2>] ? kmem_cache_free+0x242/0x2b0
[   76.695140]  [<ffffffff811b95f6>] vfs_read+0x86/0x130
[   76.695144]  [<ffffffff811ba399>] SyS_read+0x49/0xa0
[   76.695151]  [<ffffffff816cd81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[   76.695155] ---[ end trace a2c68cbdb04620f0 ]---
[   96.870930] ------------[ cut here ]------------
[   96.870944] WARNING: CPU: 3 PID: 2960 at drivers/gpu/drm/drm_atomic.c:889 drm_atomic_get_property+0x244/0x2d0()
[   96.870948] Modules linked in: msr cpufreq_powersave cpufreq_userspace cpufreq_conservative cpufreq_stats binfmt_misc uinput ext2 vfat fat fuse loop dm_crypt dm_mod hid_generic usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support arc4 x86_pkg_temp_thermal coretemp kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel hmac drbg snd_hda_intel aesni_intel sdhci_pci snd_hda_codec aes_x86_64 glue_helper lrw sdhci gf128mul ablk_helper cryptd mmc_core snd_hwdep snd_hda_core pcspkr sg serio_raw snd_pcm lpc_ich i2c_i801 mfd_core snd_timer thinkpad_acpi wmi nvram snd battery ac soundcore e1000e ehci_pci led_class xhci_pci xhci_hcd ehci_hcd processor thermal [last unloaded: cfg80211]
[   96.871047] CPU: 3 PID: 2960 Comm: powertop Tainted: G        W       4.3.0-rc5+ #1
[   96.871050] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
[   96.871053]  ffffffff81aacd61 ffff880211b73c88 ffffffff812f558c 0000000000000000
[   96.871060]  ffff880211b73cc0 ffffffff8105d346 ffff8800ca5e8828 ffff880213586480
[   96.871066]  ffff8800ca5e8800 ffff880211eb7f00 ffff8802136db000 ffff880211b73cd0
[   96.871072] Call Trace:
[   96.871082]  [<ffffffff812f558c>] dump_stack+0x4e/0x82
[   96.871087]  [<ffffffff8105d346>] warn_slowpath_common+0x86/0xc0
[   96.871091]  [<ffffffff8105d43a>] warn_slowpath_null+0x1a/0x20
[   96.871096]  [<ffffffff8140b494>] drm_atomic_get_property+0x244/0x2d0
[   96.871102]  [<ffffffff813f8aec>] drm_object_property_get_value+0x6c/0x70
[   96.871105]  [<ffffffff813f6aef>] dpms_show+0x2f/0x70
[   96.871111]  [<ffffffff814c7af0>] dev_attr_show+0x20/0x50
[   96.871117]  [<ffffffff812331e1>] ? sysfs_file_ops+0x41/0x60
[   96.871122]  [<ffffffff812334f8>] sysfs_kf_seq_show+0xa8/0x110
[   96.871127]  [<ffffffff81231bc6>] kernfs_seq_show+0x26/0x30
[   96.871133]  [<ffffffff811e0549>] seq_read+0xe9/0x3c0
[   96.871138]  [<ffffffff81232597>] kernfs_fop_read+0x127/0x170
[   96.871144]  [<ffffffff810ab7d9>] ? __lock_is_held+0x49/0x70
[   96.871149]  [<ffffffff811b8fe8>] __vfs_read+0x28/0xd0
[   96.871155]  [<ffffffff811c9203>] ? putname+0x53/0x60
[   96.871161]  [<ffffffff810ca866>] ? rcu_read_lock_sched_held+0x86/0x90
[   96.871167]  [<ffffffff811a7ae2>] ? kmem_cache_free+0x242/0x2b0
[   96.871171]  [<ffffffff811b95f6>] vfs_read+0x86/0x130
[   96.871175]  [<ffffffff811ba399>] SyS_read+0x49/0xa0
[   96.871182]  [<ffffffff816cd81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[   96.871186] ---[ end trace a2c68cbdb04620f1 ]---
[  117.755501] ------------[ cut here ]------------
[  117.755517] WARNING: CPU: 1 PID: 2960 at drivers/gpu/drm/drm_atomic.c:889 drm_atomic_get_property+0x244/0x2d0()
[  117.755520] Modules linked in: msr cpufreq_powersave cpufreq_userspace cpufreq_conservative cpufreq_stats binfmt_misc uinput ext2 vfat fat fuse loop dm_crypt dm_mod hid_generic usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support arc4 x86_pkg_temp_thermal coretemp kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel hmac drbg snd_hda_intel aesni_intel sdhci_pci snd_hda_codec aes_x86_64 glue_helper lrw sdhci gf128mul ablk_helper cryptd mmc_core snd_hwdep snd_hda_core pcspkr sg serio_raw snd_pcm lpc_ich i2c_i801 mfd_core snd_timer thinkpad_acpi wmi nvram snd battery ac soundcore e1000e ehci_pci led_class xhci_pci xhci_hcd ehci_hcd processor thermal [last unloaded: cfg80211]
[  117.755619] CPU: 1 PID: 2960 Comm: powertop Tainted: G        W       4.3.0-rc5+ #1
[  117.755623] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
[  117.755626]  ffffffff81aacd61 ffff880211b73c88 ffffffff812f558c 0000000000000000
[  117.755633]  ffff880211b73cc0 ffffffff8105d346 ffff8800ca5e8828 ffff880213586480
[  117.755639]  ffff8800ca5e8800 ffff880212f22f00 ffff880212902000 ffff880211b73cd0
[  117.755645] Call Trace:
[  117.755655]  [<ffffffff812f558c>] dump_stack+0x4e/0x82
[  117.755660]  [<ffffffff8105d346>] warn_slowpath_common+0x86/0xc0
[  117.755664]  [<ffffffff8105d43a>] warn_slowpath_null+0x1a/0x20
[  117.755669]  [<ffffffff8140b494>] drm_atomic_get_property+0x244/0x2d0
[  117.755675]  [<ffffffff813f8aec>] drm_object_property_get_value+0x6c/0x70
[  117.755679]  [<ffffffff813f6aef>] dpms_show+0x2f/0x70
[  117.755684]  [<ffffffff814c7af0>] dev_attr_show+0x20/0x50
[  117.755691]  [<ffffffff812331e1>] ? sysfs_file_ops+0x41/0x60
[  117.755695]  [<ffffffff812334f8>] sysfs_kf_seq_show+0xa8/0x110
[  117.755701]  [<ffffffff81231bc6>] kernfs_seq_show+0x26/0x30
[  117.755706]  [<ffffffff811e0549>] seq_read+0xe9/0x3c0
[  117.755711]  [<ffffffff81232597>] kernfs_fop_read+0x127/0x170
[  117.755717]  [<ffffffff810ab7d9>] ? __lock_is_held+0x49/0x70
[  117.755723]  [<ffffffff811b8fe8>] __vfs_read+0x28/0xd0
[  117.755728]  [<ffffffff811c9203>] ? putname+0x53/0x60
[  117.755735]  [<ffffffff810ca866>] ? rcu_read_lock_sched_held+0x86/0x90
[  117.755740]  [<ffffffff811a7ae2>] ? kmem_cache_free+0x242/0x2b0
[  117.755745]  [<ffffffff811b95f6>] vfs_read+0x86/0x130
[  117.755749]  [<ffffffff811ba399>] SyS_read+0x49/0xa0
[  117.755756]  [<ffffffff816cd81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[  117.755760] ---[ end trace a2c68cbdb04620f2 ]---
[  138.580203] ------------[ cut here ]------------
[  138.580218] WARNING: CPU: 1 PID: 2960 at drivers/gpu/drm/drm_atomic.c:889 drm_atomic_get_property+0x244/0x2d0()
[  138.580221] Modules linked in: msr cpufreq_powersave cpufreq_userspace cpufreq_conservative cpufreq_stats binfmt_misc uinput ext2 vfat fat fuse loop dm_crypt dm_mod hid_generic usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support arc4 x86_pkg_temp_thermal coretemp kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel hmac drbg snd_hda_intel aesni_intel sdhci_pci snd_hda_codec aes_x86_64 glue_helper lrw sdhci gf128mul ablk_helper cryptd mmc_core snd_hwdep snd_hda_core pcspkr sg serio_raw snd_pcm lpc_ich i2c_i801 mfd_core snd_timer thinkpad_acpi wmi nvram snd battery ac soundcore e1000e ehci_pci led_class xhci_pci xhci_hcd ehci_hcd processor thermal [last unloaded: cfg80211]
[  138.580315] CPU: 1 PID: 2960 Comm: powertop Tainted: G        W       4.3.0-rc5+ #1
[  138.580317] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
[  138.580320]  ffffffff81aacd61 ffff880211b73c88 ffffffff812f558c 0000000000000000
[  138.580327]  ffff880211b73cc0 ffffffff8105d346 ffff8800ca5e8828 ffff880213586480
[  138.580333]  ffff8800ca5e8800 ffff880212f22900 ffff880212901000 ffff880211b73cd0
[  138.580339] Call Trace:
[  138.580348]  [<ffffffff812f558c>] dump_stack+0x4e/0x82
[  138.580353]  [<ffffffff8105d346>] warn_slowpath_common+0x86/0xc0
[  138.580357]  [<ffffffff8105d43a>] warn_slowpath_null+0x1a/0x20
[  138.580361]  [<ffffffff8140b494>] drm_atomic_get_property+0x244/0x2d0
[  138.580367]  [<ffffffff813f8aec>] drm_object_property_get_value+0x6c/0x70
[  138.580371]  [<ffffffff813f6aef>] dpms_show+0x2f/0x70
[  138.580376]  [<ffffffff814c7af0>] dev_attr_show+0x20/0x50
[  138.580382]  [<ffffffff812331e1>] ? sysfs_file_ops+0x41/0x60
[  138.580387]  [<ffffffff812334f8>] sysfs_kf_seq_show+0xa8/0x110
[  138.580392]  [<ffffffff81231bc6>] kernfs_seq_show+0x26/0x30
[  138.580397]  [<ffffffff811e0549>] seq_read+0xe9/0x3c0
[  138.580402]  [<ffffffff81232597>] kernfs_fop_read+0x127/0x170
[  138.580407]  [<ffffffff810ab7d9>] ? __lock_is_held+0x49/0x70
[  138.580413]  [<ffffffff811b8fe8>] __vfs_read+0x28/0xd0
[  138.580418]  [<ffffffff811c9203>] ? putname+0x53/0x60
[  138.580424]  [<ffffffff810ca866>] ? rcu_read_lock_sched_held+0x86/0x90
[  138.580430]  [<ffffffff811a7ae2>] ? kmem_cache_free+0x242/0x2b0
[  138.580434]  [<ffffffff811b95f6>] vfs_read+0x86/0x130
[  138.580438]  [<ffffffff811ba399>] SyS_read+0x49/0xa0
[  138.580444]  [<ffffffff816cd81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[  138.580448] ---[ end trace a2c68cbdb04620f3 ]---
[  159.413703] ------------[ cut here ]------------
[  159.413718] WARNING: CPU: 0 PID: 2960 at drivers/gpu/drm/drm_atomic.c:889 drm_atomic_get_property+0x244/0x2d0()
[  159.413721] Modules linked in: msr cpufreq_powersave cpufreq_userspace cpufreq_conservative cpufreq_stats binfmt_misc uinput ext2 vfat fat fuse loop dm_crypt dm_mod hid_generic usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support arc4 x86_pkg_temp_thermal coretemp kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel hmac drbg snd_hda_intel aesni_intel sdhci_pci snd_hda_codec aes_x86_64 glue_helper lrw sdhci gf128mul ablk_helper cryptd mmc_core snd_hwdep snd_hda_core pcspkr sg serio_raw snd_pcm lpc_ich i2c_i801 mfd_core snd_timer thinkpad_acpi wmi nvram snd battery ac soundcore e1000e ehci_pci led_class xhci_pci xhci_hcd ehci_hcd processor thermal [last unloaded: cfg80211]
[  159.413820] CPU: 0 PID: 2960 Comm: powertop Tainted: G        W       4.3.0-rc5+ #1
[  159.413823] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
[  159.413826]  ffffffff81aacd61 ffff880211b73c88 ffffffff812f558c 0000000000000000
[  159.413833]  ffff880211b73cc0 ffffffff8105d346 ffff8800ca5e8828 ffff880213586480
[  159.413839]  ffff8800ca5e8800 ffff8800c9bf2f00 ffff880211f73000 ffff880211b73cd0
[  159.413846] Call Trace:
[  159.413855]  [<ffffffff812f558c>] dump_stack+0x4e/0x82
[  159.413861]  [<ffffffff8105d346>] warn_slowpath_common+0x86/0xc0
[  159.413865]  [<ffffffff8105d43a>] warn_slowpath_null+0x1a/0x20
[  159.413869]  [<ffffffff8140b494>] drm_atomic_get_property+0x244/0x2d0
[  159.413875]  [<ffffffff813f8aec>] drm_object_property_get_value+0x6c/0x70
[  159.413879]  [<ffffffff813f6aef>] dpms_show+0x2f/0x70
[  159.413885]  [<ffffffff814c7af0>] dev_attr_show+0x20/0x50
[  159.413891]  [<ffffffff812331e1>] ? sysfs_file_ops+0x41/0x60
[  159.413896]  [<ffffffff812334f8>] sysfs_kf_seq_show+0xa8/0x110
[  159.413901]  [<ffffffff81231bc6>] kernfs_seq_show+0x26/0x30
[  159.413907]  [<ffffffff811e0549>] seq_read+0xe9/0x3c0
[  159.413912]  [<ffffffff81232597>] kernfs_fop_read+0x127/0x170
[  159.413918]  [<ffffffff810ab7d9>] ? __lock_is_held+0x49/0x70
[  159.413924]  [<ffffffff811b8fe8>] __vfs_read+0x28/0xd0
[  159.413929]  [<ffffffff811c9203>] ? putname+0x53/0x60
[  159.413935]  [<ffffffff810ca866>] ? rcu_read_lock_sched_held+0x86/0x90
[  159.413941]  [<ffffffff811a7ae2>] ? kmem_cache_free+0x242/0x2b0
[  159.413946]  [<ffffffff811b95f6>] vfs_read+0x86/0x130
[  159.413950]  [<ffffffff811ba399>] SyS_read+0x49/0xa0
[  159.413957]  [<ffffffff816cd81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[  159.413961] ---[ end trace a2c68cbdb04620f4 ]---
[  170.880984] ------------[ cut here ]------------
[  170.880998] WARNING: CPU: 1 PID: 2960 at drivers/gpu/drm/drm_atomic.c:889 drm_atomic_get_property+0x244/0x2d0()
[  170.881001] Modules linked in: msr cpufreq_powersave cpufreq_userspace cpufreq_conservative cpufreq_stats binfmt_misc uinput ext2 vfat fat fuse loop dm_crypt dm_mod hid_generic usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vendor_support arc4 x86_pkg_temp_thermal coretemp kvm_intel kvm crc32_pclmul crc32c_intel ghash_clmulni_intel hmac drbg snd_hda_intel aesni_intel sdhci_pci snd_hda_codec aes_x86_64 glue_helper lrw sdhci gf128mul ablk_helper cryptd mmc_core snd_hwdep snd_hda_core pcspkr sg serio_raw snd_pcm lpc_ich i2c_i801 mfd_core snd_timer thinkpad_acpi wmi nvram snd battery ac soundcore e1000e ehci_pci led_class xhci_pci xhci_hcd ehci_hcd processor thermal [last unloaded: cfg80211]
[  170.881093] CPU: 1 PID: 2960 Comm: powertop Tainted: G        W       4.3.0-rc5+ #1
[  170.881096] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
[  170.881099]  ffffffff81aacd61 ffff880211b73c88 ffffffff812f558c 0000000000000000
[  170.881105]  ffff880211b73cc0 ffffffff8105d346 ffff8800ca5e8828 ffff880213586480
[  170.881111]  ffff8800ca5e8800 ffff880212f22300 ffff880212904000 ffff880211b73cd0
[  170.881117] Call Trace:
[  170.881126]  [<ffffffff812f558c>] dump_stack+0x4e/0x82
[  170.881130]  [<ffffffff8105d346>] warn_slowpath_common+0x86/0xc0
[  170.881134]  [<ffffffff8105d43a>] warn_slowpath_null+0x1a/0x20
[  170.881138]  [<ffffffff8140b494>] drm_atomic_get_property+0x244/0x2d0
[  170.881144]  [<ffffffff813f8aec>] drm_object_property_get_value+0x6c/0x70
[  170.881147]  [<ffffffff813f6aef>] dpms_show+0x2f/0x70
[  170.881152]  [<ffffffff814c7af0>] dev_attr_show+0x20/0x50
[  170.881158]  [<ffffffff812331e1>] ? sysfs_file_ops+0x41/0x60
[  170.881163]  [<ffffffff812334f8>] sysfs_kf_seq_show+0xa8/0x110
[  170.881168]  [<ffffffff81231bc6>] kernfs_seq_show+0x26/0x30
[  170.881173]  [<ffffffff811e0549>] seq_read+0xe9/0x3c0
[  170.881177]  [<ffffffff81232597>] kernfs_fop_read+0x127/0x170
[  170.881183]  [<ffffffff810ab7d9>] ? __lock_is_held+0x49/0x70
[  170.881188]  [<ffffffff811b8fe8>] __vfs_read+0x28/0xd0
[  170.881193]  [<ffffffff811c9203>] ? putname+0x53/0x60
[  170.881198]  [<ffffffff810ca866>] ? rcu_read_lock_sched_held+0x86/0x90
[  170.881203]  [<ffffffff811a7ae2>] ? kmem_cache_free+0x242/0x2b0
[  170.881207]  [<ffffffff811b95f6>] vfs_read+0x86/0x130
[  170.881211]  [<ffffffff811ba399>] SyS_read+0x49/0xa0
[  170.881217]  [<ffffffff816cd81b>] entry_SYSCALL_64_fastpath+0x16/0x73
[  170.881221] ---[ end trace a2c68cbdb04620f5 ]---

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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