RE: [lkp] [drm/i915/vlv] ff6eee6113: WARNING: CPU: 0 PID: 194 at drivers/gpu/drm/i915/intel_uncore.c:803 __unclaimed_reg_debug+0x6d/0x80 [i915]

From: Ding, ChiX
Date: Tue Jul 12 2016 - 12:35:18 EST

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In reply to: kernel test robot: "[lkp] [drm/i915/vlv] ff6eee6113: WARNING: CPU: 0 PID: 194 at drivers/gpu/drm/i915/intel_uncore.c:803 __unclaimed_reg_debug+0x6d/0x80 [i915]"
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Hi there
I have been assigned to aother project and no longer work on this anymore.

Thanks,
Chi

-----Original Message-----
From: lkp-request@xxxxxxxxxxxxxxxxx [mailto:lkp-request@xxxxxxxxxxxxxxxxx] On Behalf Of Ye, Xiaolong
Sent: Tuesday, July 12, 2016 4:12 AM
To: Maarten Lankhorst
Cc: Wu, Fengguang; Ding, ChiX; LKML; lkp@xxxxxx
Subject: [lkp] [drm/i915/vlv] ff6eee6113: WARNING: CPU: 0 PID: 194 at drivers/gpu/drm/i915/intel_uncore.c:803 __unclaimed_reg_debug+0x6d/0x80 [i915]

FYI, we noticed the following commit:

https://github.com/0day-ci/linux Chi-Ding/drm-i915-Remove-unused-parameters-from-intel_plane_wm_parameters/20160623-210225
commit ff6eee61132377c1fcf44fec29ecc7560a2a9df0 ("drm/i915/vlv: Add intermediate field in intel_crtc_wm_state and handlers for two-level watermark")

in testcase: autotest
with following parameters: test=cyclictest

on test machine: 2 threads Minnowboard Max with 2G memory

caused below changes:

<4>[ 44.549007] ------------[ cut here ]------------
<4>[ 44.549234] WARNING: CPU: 0 PID: 194 at drivers/gpu/drm/i915/intel_uncore.c:803 __unclaimed_reg_debug+0x6d/0x80 [i915]
<4>[ 44.549241] Unclaimed register detected after reading register 0x1f0030
<4>[ 44.549313] Modules linked in: sd_mod coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel i915 aesni_intel snd_hda_intel lrw gf128mul glue_helper ablk_helper cryptd video snd_hda_codec drm_kms_helper syscopyarea snd_hda_core s
ysfillrect pcspkr usb_storage snd_hwdep sysimgblt fb_sys_fops snd_pcm snd_timer snd shpchp soundcore drm
<4>[ 44.549323] CPU: 0 PID: 194 Comm: kworker/u2:2 Not tainted 4.7.0-rc2-00666-gff6eee6 #1
<4>[ 44.549340] Workqueue: events_unbound async_run_entry_fn
<4>[ 44.549354] 0000000000000000 ffff8800774f35b8 ffffffff81432c4a ffff8800774f3608
<4>[ 44.549364] 0000000000000000 ffff8800774f35f8 ffffffff8107d681 00000323a01f4c2b
<4>[ 44.549374] 00000000001f0030 0000000000000000 0000000000000001 ffff880077a30000
<4>[ 44.549376] Call Trace:
<4>[ 44.549392] [<ffffffff81432c4a>] dump_stack+0x63/0x89
<4>[ 44.549401] [<ffffffff8107d681>] __warn+0xd1/0xf0
<4>[ 44.549410] [<ffffffff8107d6ef>] warn_slowpath_fmt+0x4f/0x60
<4>[ 44.549423] [<ffffffff810b3996>] ? update_curr+0x66/0x180
<4>[ 44.549433] [<ffffffff810b3996>] ? update_curr+0x66/0x180
<4>[ 44.549634] [<ffffffffa01f4c7d>] __unclaimed_reg_debug+0x6d/0x80 [i915]
<4>[ 44.549830] [<ffffffffa01f5e24>] vlv_read32+0x284/0x2c0 [i915]
<4>[ 44.550010] [<ffffffffa01aad44>] vlv_pipe_set_fifo_size+0xa4/0x2b0 [i915]
<4>[ 44.550190] [<ffffffffa01b0ac4>] vlv_update_wm+0x614/0x6e0 [i915]
<4>[ 44.550201] [<ffffffff810b53a5>] ? put_prev_entity+0x35/0x840
<4>[ 44.550213] [<ffffffff8102c74b>] ? __switch_to+0x29b/0x5b0
<4>[ 44.550395] [<ffffffffa01b0cbd>] vlv_initial_watermarks+0x8d/0xa0 [i915]
<4>[ 44.550594] [<ffffffffa021c30a>] intel_pre_plane_update+0x11a/0x1b0 [i915]
<4>[ 44.550795] [<ffffffffa021cb3b>] intel_atomic_commit_tail+0x2cb/0x1110 [i915]
<4>[ 44.550806] [<ffffffff810c2022>] ? complete_all+0x42/0x50
<4>[ 44.550818] [<ffffffff810a38f9>] ? __might_sleep+0x49/0x80
<4>[ 44.551018] [<ffffffffa021dd24>] intel_atomic_commit+0x3a4/0x530 [i915]
<4>[ 44.551117] [<ffffffffa001f800>] ? drm_atomic_check_only+0xd0/0x640 [drm]
<4>[ 44.551207] [<ffffffffa0020277>] ? drm_atomic_add_affected_connectors+0x27/0xf0 [drm]
<4>[ 44.551297] [<ffffffffa001fda7>] drm_atomic_commit+0x37/0x60 [drm]
<4>[ 44.551345] [<ffffffffa013924c>] restore_fbdev_mode+0x14c/0x270 [drm_kms_helper]
<4>[ 44.551389] [<ffffffffa013abf3>] drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
<4>[ 44.551432] [<ffffffffa013ac6d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
<4>[ 44.551475] [<ffffffffa013ab78>] drm_fb_helper_hotplug_event+0xa8/0xf0 [drm_kms_helper]
<4>[ 44.551518] [<ffffffffa013ac16>] drm_fb_helper_restore_fbdev_mode_unlocked+0x56/0x80 [drm_kms_helper]
<4>[ 44.551561] [<ffffffffa013ac6d>] drm_fb_helper_set_par+0x2d/0x50 [drm_kms_helper]
<4>[ 44.551766] [<ffffffffa0236afa>] intel_fbdev_set_par+0x1a/0x60 [i915]
<4>[ 44.551778] [<ffffffff814a6413>] fbcon_init+0x533/0x5a0
<4>[ 44.551790] [<ffffffff8153e84a>] visual_init+0xca/0x130
<4>[ 44.551800] [<ffffffff81540cc7>] do_bind_con_driver+0x167/0x3a0
<4>[ 44.551812] [<ffffffff8154122f>] do_take_over_console+0x12f/0x1a0
<4>[ 44.551822] [<ffffffff814a16e7>] do_fbcon_takeover+0x57/0xb0
<4>[ 44.551831] [<ffffffff814a6e8d>] fbcon_event_notify+0x64d/0x750
<4>[ 44.551844] [<ffffffff8109ddda>] notifier_call_chain+0x4a/0x70
<4>[ 44.551855] [<ffffffff8109e127>] __blocking_notifier_call_chain+0x47/0x60
<4>[ 44.551866] [<ffffffff8109e156>] blocking_notifier_call_chain+0x16/0x20
<4>[ 44.551876] [<ffffffff814ac6db>] fb_notifier_call_chain+0x1b/0x20
<4>[ 44.551887] [<ffffffff814ae8bb>] register_framebuffer+0x24b/0x330
<4>[ 44.551932] [<ffffffffa013aec8>] drm_fb_helper_initial_config+0x238/0x3c0 [drm_kms_helper]
<4>[ 44.552130] [<ffffffffa0237d68>] intel_fbdev_initial_config+0x18/0x30 [i915]
<4>[ 44.552140] [<ffffffff8109f87a>] async_run_entry_fn+0x4a/0x140
<4>[ 44.552149] [<ffffffff810969b8>] process_one_work+0x158/0x460
<4>[ 44.552158] [<ffffffff8109761e>] worker_thread+0x4e/0x4c0
<4>[ 44.552167] [<ffffffff810975d0>] ? rescuer_thread+0x350/0x350
<4>[ 44.552175] [<ffffffff810975d0>] ? rescuer_thread+0x350/0x350
<4>[ 44.552185] [<ffffffff8109cbc4>] kthread+0xd4/0xf0
<4>[ 44.552199] [<ffffffff819177ff>] ret_from_fork+0x1f/0x40
<4>[ 44.552209] [<ffffffff8109caf0>] ? kthread_park+0x60/0x60
<4>[ 44.552216] ---[ end trace 1395d82281f53585 ]---

To reproduce:

git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml

Thanks,
Xiaolong
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Next message: Thomas Gleixner: "Re: [patch 10/15] sched/migration: Move calc_load_migrate() into CPU_DYING"
Previous message: Andy Lutomirski: "Re: [PATCH 6/9] x86, pkeys: add pkey set/get syscalls"
In reply to: kernel test robot: "[lkp] [drm/i915/vlv] ff6eee6113: WARNING: CPU: 0 PID: 194 at drivers/gpu/drm/i915/intel_uncore.c:803 __unclaimed_reg_debug+0x6d/0x80 [i915]"
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