[    1.110402] WARNING: CPU: 0 PID: 402 at drivers/gpu/drm/i915/intel_dp.c:4046 intel_dp_check_link_status+0x1bb/0x1e0
[    1.110415] WARN_ON_ONCE(!intel_dp->lane_count)
[    1.110424] CPU: 0 PID: 402 Comm: kworker/u4:2 Not tainted 4.9.0-rc1+ #8
[    1.110436] Hardware name: Dell Inc. Inspiron 14-3452/0HHRWV, BIOS 4.0.11 08/24/2016
[    1.110452] Workqueue: events_unbound async_run_entry_fn
[    1.110465]  ffffc900000b7bc8 ffffffff812e07ea ffffc900000b7c18 0000000000000000
[    1.110480]  ffffc900000b7c08 ffffffff81091bfb 00000fce00000000 ffff88027683f0f0
[    1.110495]  0000000000000001 ffff880275908000 ffff880275908258 ffff88027683f000
[    1.110509] Call Trace:
[    1.110521]  [<ffffffff812e07ea>] dump_stack+0x4d/0x63
[    1.110531]  [<ffffffff81091bfb>] __warn+0xcb/0xf0
[    1.110540]  [<ffffffff81091c6c>] warn_slowpath_fmt+0x4c/0x50
[    1.110552]  [<ffffffff813f73c4>] ? drm_dp_dpcd_read+0x54/0x60
[    1.110561]  [<ffffffff814c8fab>] intel_dp_check_link_status+0x1bb/0x1e0
[    1.110573]  [<ffffffff814cd842>] intel_dp_detect+0x762/0xbd0
[    1.110582]  [<ffffffff813f7f0e>] drm_helper_probe_single_connector_modes+0x40e/0x4c0
[    1.110597]  [<ffffffff81403a59>] drm_fb_helper_probe_connector_modes.isra.5+0x49/0x70
[    1.110611]  [<ffffffff81406440>] drm_fb_helper_initial_config+0x60/0x3d0
[    1.110620]  [<ffffffff810b864a>] ? try_to_wake_up+0x4a/0x370
[    1.110630]  [<ffffffff814bf4a3>] intel_fbdev_initial_config+0x13/0x30
[    1.110640]  [<ffffffff810b1c85>] async_run_entry_fn+0x35/0xf0
[    1.110650]  [<ffffffff810a9191>] process_one_work+0x151/0x400
[    1.110659]  [<ffffffff810a9487>] worker_thread+0x47/0x480
[    1.110668]  [<ffffffff810a9440>] ? process_one_work+0x400/0x400
[    1.110677]  [<ffffffff810a9440>] ? process_one_work+0x400/0x400
[    1.110686]  [<ffffffff810a65a9>] ? call_usermodehelper_exec_async+0x129/0x140
[    1.110701]  [<ffffffff810aeba7>] kthread+0xc7/0xe0
[    1.110711]  [<ffffffff810aeae0>] ? __kthread_parkme+0x70/0x70
[    1.110719]  [<ffffffff810a6480>] ? proc_cap_handler+0x180/0x180
[    1.110731]  [<ffffffff8196af92>] ret_from_fork+0x22/0x30