[Bug 88601] [DP MST] fallout on resume after undocking

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=88601

--- Comment #5 from Dmitry Nezhevenko <dion at inhex.net> ---
Looks like this is also applicable to 3.19 kernel. dmesg was flooded with tons
of followed warning:


WARNING: CPU: 0 PID: 13507 at drivers/gpu/drm/drm_dp_mst_topology.c:1268
process_single_tx_qlock+0x5d0/0x640 [drm_kms_helper]()
fail
Modules linked in: vmnet(O) parport_pc vmw_vsock_vmci_transport vsock vmw_vmci
vmmon(O) bluetooth nls_iso8859_1 isofs udf crc_itu_t mmc_block cdc_mbim cdc_wdm
cdc_ncm snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_seq_device ctr ccm
rndis_wlan rndis_host cdc_ether usbnet mii rpcsec_gss_krb5 nfsv4 dns_resolver
tun binfmt_misc acpi_call(O) nfsd auth_rpcgss oid_registry nfs_acl nfs lockd
grace fscache sunrpc iptable_nat nf_nat_ipv4 nf_nat nf_log_ipv4 nf_log_common
xt_LOG ipt_REJECT nf_reject_ipv4 xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4
xt_recent xt_conntrack nf_conntrack iptable_filter ip_tables x_tables uvcvideo
videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media
nls_utf8 nls_cp437 vfat fat arc4 joydev iTCO_wdt iwlmvm iTCO_vendor_support
snd_hda_codec_hdmi x86_pkg_temp_thermal mac80211 intel_powerclamp
snd_hda_codec_realtek snd_hda_codec_generic intel_rapl iosf_mbi coretemp
snd_hda_intel kvm_intel snd_hda_controller iwlwifi snd_hda_codec kvm psmouse
snd_hwdep serio_raw rtsx_pci_ms snd_pcm thinkpad_acpi pcspkr mei_me cfg80211
efivars lpc_ich xhci_pci tpm_tis memstick snd_timer nvram i2c_i801 mei snd
soundcore wmi rfkill battery ac tpm ie31200_edac shpchp edac_core processor
evdev i2c_dev fuse ppdev lp parport autofs4 algif_skcipher af_alg dm_crypt
dm_mod usbhid hid_generic hid_microsoft hid xhci_hcd uhci_hcd ohci_hcd
usb_storage ext4 crc16 mbcache jbd2 sg sd_mod rtsx_pci_sdmmc mmc_core ahci
crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel i915 libahci
aesni_intel i2c_algo_bit aes_x86_64 rtsx_pci lrw ehci_pci mfd_core gf128mul
drm_kms_helper glue_helper ablk_helper libata ehci_hcd cryptd e1000e drm video
ptp usbcore thermal scsi_mod i2c_core pps_core usb_common thermal_sys button
[last unloaded: parport_pc]
CPU: 0 PID: 13507 Comm: Xorg Tainted: G     U     O   3.19.0+ #1
Hardware name: LENOVO 20ANCTO1WW/20ANCTO1WW, BIOS GLET71WW (2.25 ) 07/02/2014
 0000000000000000 ffffffffa0253e80 ffffffff81552ec4 ffff8804105c3918
 ffffffff8106cd81 0000000000000000 0000000000001000 0000000000000010
 ffff880427a14608 000000000000000c ffffffff8106cdfa ffffffffa0254b75
Call Trace:
 [<ffffffff81552ec4>] ? dump_stack+0x40/0x50
 [<ffffffff8106cd81>] ? warn_slowpath_common+0x81/0xb0
 [<ffffffff8106cdfa>] ? warn_slowpath_fmt+0x4a/0x50
 [<ffffffffa0248530>] ? process_single_tx_qlock+0x5d0/0x640 [drm_kms_helper]
 [<ffffffff810a891e>] ? finish_wait+0x2e/0x70
 [<ffffffff8155686e>] ? mutex_lock+0xe/0x30
 [<ffffffffa02485d8>] ? process_single_down_tx_qlock+0x38/0x120
[drm_kms_helper]
 [<ffffffffa024871c>] ? drm_dp_queue_down_tx+0x5c/0x70 [drm_kms_helper]
 [<ffffffffa024b2ee>] ? drm_dp_mst_i2c_xfer+0x15e/0x270 [drm_kms_helper]
 [<ffffffffa001823c>] ? __i2c_transfer+0x6c/0x200 [i2c_core]
 [<ffffffffa0019867>] ? i2c_transfer+0x77/0xd0 [i2c_core]
 [<ffffffffa01538fc>] ? drm_do_probe_ddc_edid+0xcc/0x140 [drm]
 [<ffffffffa0154f8d>] ? drm_get_edid+0x2d/0x3f0 [drm]
 [<ffffffffa037ae9a>] ? gen6_read32+0x9a/0x130 [i915]
 [<ffffffff8155686e>] ? mutex_lock+0xe/0x30
 [<ffffffffa024a01c>] ? drm_dp_mst_get_edid+0x6c/0x80 [drm_kms_helper]
 [<ffffffffa03b8208>] ? intel_dp_mst_get_modes+0x28/0x50 [i915]
 [<ffffffffa024687a>] ?
drm_helper_probe_single_connector_modes_merge_bits+0xea/0x420 [drm_kms_helper]
 [<ffffffffa014f6bc>] ? drm_mode_getconnector+0x3ec/0x450 [drm]
 [<ffffffffa015aca9>] ? drm_modeset_lock_all_crtcs+0xa9/0xc0 [drm]
 [<ffffffffa01417b3>] ? drm_ioctl+0x1c3/0x5a0 [drm]
 [<ffffffff811d6db8>] ? do_vfs_ioctl+0x2e8/0x4f0
 [<ffffffff8107c1f4>] ? restore_altstack+0x14/0x30
 [<ffffffff81014256>] ? sys_rt_sigreturn+0xa6/0xb0
 [<ffffffff811d7041>] ? SyS_ioctl+0x81/0xa0
 [<ffffffff8155896d>] ? system_call_fastpath+0x16/0x1b
---[ end trace 8ac8ee0085d79660 ]---

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