[Bug 99655] New: i915 warning: WARN_ON_ONCE(!intel_dp->lane_count)
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Thu Feb 2 19:14:36 UTC 2017
https://bugs.freedesktop.org/show_bug.cgi?id=99655
Bug ID: 99655
Summary: i915 warning: WARN_ON_ONCE(!intel_dp->lane_count)
Product: DRI
Version: DRI git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: DRM/Intel
Assignee: intel-gfx-bugs at lists.freedesktop.org
Reporter: manasi.d.navare at intel.com
QA Contact: intel-gfx-bugs at lists.freedesktop.org
CC: intel-gfx-bugs at lists.freedesktop.org
[drm] Initialized i915 1.6.0 20161121 for 0000:00:02.0 on minor 0
> > ------------[ cut here ]------------
> > WARNING: CPU: 1 PID: 130 at drivers/gpu/drm/i915/intel_dp.c:4018
> > intel_dp_check_link_status+0x1db$
> > WARN_ON_ONCE(!intel_dp->lane_count)
> > Modules linked in:
> > rtsx_pci_sdmmc mmc_core crct10dif_pclmul crc32_pclmul
> > crc32c_intel
> > i915 ghash_clmulni_intel i2c_$
> > CPU: 1 PID: 130 Comm: kworker/u8:7 Not tainted
> > 4.9.0-04822-g9439b3710df6
> > #6
> > Hardware name: Dell Inc. XPS 13 9350/09JHRY, BIOS 1.4.4 06/14/2016
> > Workqueue: events_unbound async_run_entry_fn
> > Call Trace:
> > intel_dp_check_link_status+0x1db/0x200 [i915]
> > intel_dp_detect+0x697/0xa40 [i915]
> > drm_helper_probe_single_connector_modes+0x2a3/0x500
> [drm_kms_helper]
> > drm_setup_crtcs+0x7b/0x9c0 [drm_kms_helper]
> > drm_fb_helper_initial_config+0x79/0x3e0 [drm_kms_helper]
> > intel_fbdev_initial_config+0x18/0x30 [i915]
> > async_run_entry_fn+0x37/0x150
> > process_one_work+0x1f1/0x480
> > worker_thread+0x48/0x4d0
> > kthread+0x101/0x140
> > ret_from_fork+0x22/0x30
> > ---[ end trace 10162024459bbe32 ]---
Bug pointed out by Linus, there is a work around added by Daniel Vetter but
this needs to be fixed.
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