On Sat, Oct 11, 2014 at 01:29:35PM +0800, Fengguang Wu wrote: > FYI, we noticed the below changes on > > git://gitorious.org/vsyrjala/linux cdclk_3 > commit 5ba60fc3d719988a404d35a3e46f109bea643fef ("drm/i915: BDW cdclk change support") > > <snip> > [ 13.959092] WARNING: CPU: 0 PID: 75 at drivers/gpu/drm/i915/intel_pm.c:6231 sandybridge_pcode_write+0x171/0x190 [i915]() > [ 13.959112] Modules linked in: snd_hda_intel i915 snd_hda_controller snd_hda_codec snd_hwdep snd_pcm drm_kms_helper snd_timer snd winbond_cir drm soundcore ahci libahci rc_core pcspkr i2c_i801 libata parport_pc parport i2c_hid sdhci_acpi sdhci mmc_core video dw_dmac dw_dmac_core acpi_pad > [ 13.959115] CPU: 0 PID: 75 Comm: kworker/u16:1 Not tainted 3.17.0-rc7-g5ba60fc #1 > [ 13.959116] Hardware name: Intel Corporation Broadwell Client platform/WhiteTip Mountain 1, BIOS BDW-E1R1.86C.0079.R00.1406020127 06/02/2014 > [ 13.959122] Workqueue: events_unbound async_run_entry_fn > [ 13.959126] 0000000000000009 ffff880092cbb850 ffffffff818570a6 0000000000000000 > [ 13.959129] ffff880092cbb888 ffffffff8106ef1d ffff88014d380000 0000000000000000 > [ 13.959131] 0000000000000018 ffff88014dc862f0 ffff88014d380000 ffff880092cbb898 > [ 13.959132] Call Trace: > [ 13.959137] [<ffffffff818570a6>] dump_stack+0x4d/0x66 > [ 13.959142] [<ffffffff8106ef1d>] warn_slowpath_common+0x7d/0xa0 > [ 13.959145] [<ffffffff8106effa>] warn_slowpath_null+0x1a/0x20 > [ 13.959173] [<ffffffffa0213a51>] sandybridge_pcode_write+0x171/0x190 [i915] > [ 13.959212] [<ffffffffa0267926>] haswell_modeset_global_resources+0x196/0x4a0 [i915] Thanks for the report. Seems I forgot to grab the relevant lock here. Fixed patches pushed to cdclk_4 branch. -- Ville Syrjälä Intel OTC _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx