igt@kms_busy@basic@flip - dmesg-warn - Unclaimed write to register 0x1901f0
<4> [489.406813] i915 0000:03:00.0: Unclaimed write to register 0x1901f0
<4> [489.406828] WARNING: CPU: 3 PID: 5376 at drivers/gpu/drm/i915/intel_uncore.c:1512 __unclaimed_reg_debug+0x69/0x80 [i915]
<4> [489.406913] Modules linked in: vgem drm_shmem_helper snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio fuse snd_hda_codec_hdmi i915 mei_hdcp smsc75xx usbnet ttm mii drm_buddy drm_dp_helper x86_pkg_temp_thermal drm_kms_helper syscopyarea sysfillrect coretemp snd_hda_intel sysimgblt snd_intel_dspcfg fb_sys_fops crct10dif_pclmul prime_numbers crc32_pclmul ghash_clmulni_intel snd_hda_codec snd_hwdep snd_hda_core mei_me e1000e ptp i2c_i801 snd_pcm mei pps_core intel_lpss_pci i2c_smbus
<4> [489.406961] CPU: 3 PID: 5376 Comm: kworker/3:3 Not tainted 5.17.0-rc7-CI-CI_DRM_11349+ #1
<4> [489.406963] Hardware name: Intel Corporation CoffeeLake Client Platform/CoffeeLake S UDIMM RVP, BIOS CNLSFWR1.R00.X220.B00.2103302221 03/30/2021
<4> [489.406965] Workqueue: events engine_retire [i915]
<4> [489.407033] RIP: 0010:__unclaimed_reg_debug+0x69/0x80 [i915]
<4> [489.407089] Code: 48 8b 78 08 4c 8b 67 50 4d 85 e4 74 2c e8 df ab 00 e1 45 89 e8 48 89 e9 4c 89 e2 48 89 c6 48 c7 c7 60 42 96 a0 e8 b3 01 38 e1 <0f> 0b 48 8b 43 08 83 a8 74 0d 00 00 01 eb a7 4c 8b 27 eb cf 0f 1f
<4> [489.407091] RSP: 0018:ffffc90002c3fc58 EFLAGS: 00010082
<4> [489.407094] RAX: 0000000000000000 RBX: ffff888114168ee8 RCX: 0000000000000003
<4> [489.407096] RDX: 0000000080000003 RSI: ffffffff82311edd RDI: 00000000ffffffff
<4> [489.407097] RBP: ffffffffa09b7d13 R08: 0000000000000000 R09: c0000000ffff7fff
<4> [489.407099] R10: 0000000000000001 R11: ffffc90002c3fa70 R12: ffff888102d8f880
<4> [489.407100] R13: 00000000001901f0 R14: 0000000000000206 R15: ffff88811416ba00
<4> [489.407102] FS: 0000000000000000(0000) GS:ffff88846d780000(0000) knlGS:0000000000000000
<4> [489.407104] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [489.407105] CR2: 00007f4b3f12e820 CR3: 0000000006612003 CR4: 00000000003706e0
<4> [489.407107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4> [489.407108] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
<4> [489.407109] Call Trace:
<4> [489.407111] <TASK>
<4> [489.407114] fwtable_write32+0x25f/0x2f0 [i915]
<4> [489.407173] intel_guc_ct_send+0x3d5/0xaf0 [i915]
<4> [489.407266] slpc_set_param+0x5b/0xb0 [i915]
<4> [489.407352] slpc_force_min_freq+0x9f/0xd0 [i915]
<4> [489.407436] intel_guc_slpc_dec_waiters+0x31/0x40 [i915]
<4> [489.407519] i915_request_retire.part.69+0x2b9/0x3d0 [i915]
<4> [489.407600] retire_requests+0x4f/0x70 [i915]
<4> [489.407667] engine_retire+0x62/0x90 [i915]
<4> [489.407734] process_one_work+0x272/0x5c0
<4> [489.407744] worker_thread+0x37/0x370
<4> [489.407748] ? process_one_work+0x5c0/0x5c0
<4> [489.407750] kthread+0xed/0x120
<4> [489.407752] ? kthread_complete_and_exit+0x20/0x20
<4> [489.407757] ret_from_fork+0x1f/0x30
<4> [489.407769] </TASK>
<4> [489.407770] irq event stamp: 5605294
<4> [489.407772] hardirqs last enabled at (5605293): [<ffffffff81aeece0>] _raw_spin_unlock_irqrestore+0x50/0x60
<4> [489.407775] hardirqs last disabled at (5605294): [<ffffffff81aeeaa7>] _raw_spin_lock_irqsave+0x47/0x50
<4> [489.407777] softirqs last enabled at (5605076): [<ffffffff81e0032d>] __do_softirq+0x32d/0x493
<4> [489.407779] softirqs last disabled at (5605069): [<ffffffff810b8db6>] irq_exit_rcu+0xa6/0xe0
<4> [489.407781] ---[ end trace 0000000000000000 ]---Edited by Ravi V