[Bug 70839] New: [IVB] Undocking laptop causes warning in intel_dp_link_down+0x1d2/0x210

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70839

          Priority: medium
            Bug ID: 70839
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [IVB] Undocking laptop causes warning in
                    intel_dp_link_down+0x1d2/0x210
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: jan.brummer at tabos.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 88079
  --> https://bugs.freedesktop.org/attachment.cgi?id=88079&action=edit
dmesg output with drm.debug=0xe on latest drm-intel-nightly

Undocking my HP 8470p laptop causes a kernel warning using the latest
drm-intel-nightly git tree.

[  102.569997] ------------[ cut here ]------------
[  102.570069] WARNING: CPU: 1 PID: 969 at drivers/gpu/drm/i915/intel_dp.c:2675
intel_dp_link_down+0x1d2/0x210 [i915]()
[  102.570072] Modules linked in: fuse nf_conntrack_netbios_ns
nf_conntrack_broadcast ipt_MASQUERADE ip6t_REJECT xt_conntrack vboxpci(OF)
vboxnetadp(OF) vboxnetflt(OF) ebtable_nat ebtable_broute bridge stp llc
ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6
nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter
ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat
nf_conntrack vboxdrv(OF) iptable_mangle iptable_security iptable_raw bnep arc4
iwldvm mac80211 iwlwifi cfg80211 snd_hda_codec_hdmi snd_hda_codec_idt btusb
tpm_infineon bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops iTCO_wdt
ppdev videobuf2_core iTCO_vendor_support x86_pkg_temp_thermal videodev coretemp
kvm_intel kvm media hp_wmi sparse_keymap crc32_pclmul snd_hda_intel
crc32c_intel
[  102.570145]  snd_hda_codec ghash_clmulni_intel microcode snd_hwdep snd_seq
joydev serio_raw pcspkr snd_seq_device sdhci_pci snd_pcm sdhci mmc_core e1000e
rfkill snd_page_alloc snd_timer snd lpc_ich mfd_core tpm_tis shpchp parport_pc
soundcore mei_me ptp parport mei pps_core tpm tpm_bios wmi hp_accel lis3lv02d
nfsd input_polldev acpi_cpufreq auth_rpcgss nfs_acl lockd sunrpc binfmt_misc
i915 i2c_algo_bit drm_kms_helper drm firewire_ohci firewire_core i2c_core
crc_itu_t video
[  102.570205] CPU: 1 PID: 969 Comm: Xorg Tainted: GF          O
3.12.0-rc5-jbr+ #2
[  102.570209] Hardware name: Hewlett-Packard HP EliteBook 8470p/179B, BIOS
68ICF Ver. F.43 07/16/2013
[  102.570213]  0000000000000009 ffff88022fee1c08 ffffffff8165ecbd
0000000000000000
[  102.570221]  ffff88022fee1c40 ffffffff810680ad ffff88022e6608c8
ffff88022e269000
[  102.570228]  ffff880232b0e000 0000000080180344 ffff880035f40000
ffff88022fee1c50
[  102.570236] Call Trace:
[  102.570248]  [<ffffffff8165ecbd>] dump_stack+0x45/0x56
[  102.570257]  [<ffffffff810680ad>] warn_slowpath_common+0x7d/0xa0
[  102.570264]  [<ffffffff8106818a>] warn_slowpath_null+0x1a/0x20
[  102.570303]  [<ffffffffa00f3402>] intel_dp_link_down+0x1d2/0x210 [i915]
[  102.570335]  [<ffffffffa00f7578>] intel_disable_dp+0x68/0x70 [i915]
[  102.570365]  [<ffffffffa00dc76e>] ironlake_crtc_disable+0x1ae/0x960 [i915]
[  102.570394]  [<ffffffffa00e2b8f>] intel_crtc_update_dpms+0x6f/0xa0 [i915]
[  102.570423]  [<ffffffffa00e6209>] intel_connector_dpms+0x59/0x70 [i915]
[  102.570450]  [<ffffffffa0054598>]
drm_mode_obj_set_property_ioctl+0x308/0x320 [drm]
[  102.570471]  [<ffffffffa00545e0>]
drm_mode_connector_property_set_ioctl+0x30/0x40 [drm]
[  102.570490]  [<ffffffffa0043bf2>] drm_ioctl+0x522/0x650 [drm]
[  102.570505]  [<ffffffff811bb7dd>] do_vfs_ioctl+0x2dd/0x4b0
[  102.570511]  [<ffffffff811bba31>] SyS_ioctl+0x81/0xa0
[  102.570519]  [<ffffffff8166dca9>] system_call_fastpath+0x16/0x1b
[  102.570523] ---[ end trace 81ef030c236dabb3 ]---

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