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Date:   Sun, 5 Jan 2020 06:26:19 +0100
From:   Udo van den Heuvel <udovdh@...all.nl>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: 5.4.x: WARNING: CPU: 1 PID: 562 at
 drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:1464

Hello,

The WARNING below has been present in the kernel for quiet a while.
This WARNING happens every time a kernel is booted.
What is causing the delay to fix this?



[    2.567111] WARNING: CPU: 1 PID: 562 at
drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dcn_calcs.c:1464
dcn_bw_update_from_pplib+0xa5/0x2e0 [amdgpu]
[    2.567115] Modules linked in: hid_generic sr_mod cdrom usbhid
aesni_intel amdgpu(+) gpu_sched ttm i2c_dev autofs4
[    2.567123] CPU: 1 PID: 562 Comm: systemd-udevd Not tainted 5.4.7 #9
[    2.567126] Hardware name: Gigabyte Technology Co., Ltd. X570 AORUS
PRO/X570 AORUS PRO, BIOS F11 12/06/2019
[    2.567204] RIP: 0010:dcn_bw_update_from_pplib+0xa5/0x2e0 [amdgpu]
[    2.567208] Code: 0c 24 85 c9 74 24 8d 71 ff 48 8d 44 24 04 48 8d 54
f4 0c eb 0d 48 83 c0 08 48 39 d0 0f 84 2a 01 00 00 44 8b 00 45 85 c0 75
eb <0f> 0b e8 04 c0 b2 e6 4c 89 e2 be 04 00 00 00 4c 89 ef e8 94 59 fe
[    2.567213] RSP: 0018:ffff9df7804b36c0 EFLAGS: 00010246
[    2.567216] RAX: ffff9df7804b36c4 RBX: ffff8ba4c7c70000 RCX:
0000000000000004
[    2.567218] RDX: ffff9df7804b36e4 RSI: 0000000000000003 RDI:
ffffffffa7deab49
[    2.567221] RBP: ffff9df7804b3800 R08: 0000000000000000 R09:
00000000000003b8
[    2.567223] R10: 0720072007200720 R11: 0720072007200720 R12:
ffff9df7804b3750
[    2.567226] R13: ffff8ba4c71b1b80 R14: 0000000000000001 R15:
000000000000000a
[    2.567229] FS:  00007fa073a28940(0000) GS:ffff8ba4df040000(0000)
knlGS:0000000000000000
[    2.567232] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.567234] CR2: 000055db7a7fae98 CR3: 00000004099a6000 CR4:
00000000003406e0
[    2.567236] Call Trace:
[    2.567299]  ? amdgpu_atom_execute_table_locked+0x12c/0x210 [amdgpu]
[    2.567376]  dcn10_create_resource_pool+0x82d/0xb30 [amdgpu]
[    2.567382]  ? __kmalloc+0xeb/0xf0
[    2.567454]  dc_create_resource_pool+0xbe/0x130 [amdgpu]
[    2.567527]  dc_create+0x213/0x6b0 [amdgpu]
[    2.567602]  amdgpu_dm_init+0x138/0x1c0 [amdgpu]
[    2.567674]  ? phm_wait_for_register_unequal.part.0+0x4a/0x80 [amdgpu]
[    2.567748]  dm_hw_init+0x9/0x20 [amdgpu]
[    2.567820]  amdgpu_device_init.cold+0x119b/0x1344 [amdgpu]
[    2.567880]  amdgpu_driver_load_kms+0x41/0xc0 [amdgpu]
[    2.567886]  drm_dev_register+0x10c/0x150
[    2.567945]  amdgpu_pci_probe+0xcd/0x130 [amdgpu]
[    2.567950]  ? pci_match_device+0xd2/0x100
[    2.567953]  pci_device_probe+0xc9/0x140
[    2.567957]  really_probe+0x142/0x3b0
[    2.567960]  device_driver_attach+0x4e/0x60
[    2.567963]  __driver_attach+0x85/0x140
[    2.567966]  ? device_driver_attach+0x60/0x60
[    2.567969]  bus_for_each_dev+0x73/0xb0
[    2.567971]  bus_add_driver+0x13f/0x1e0
[    2.567974]  driver_register+0x67/0xb0
[    2.567976]  ? 0xffffffffc07a6000
[    2.567979]  do_one_initcall+0x47/0x16f
[    2.567982]  ? ___cache_free+0x2c/0x1f0
[    2.567986]  do_init_module+0x51/0x200
[    2.567989]  load_module+0x24b6/0x26e0
[    2.567993]  ? vfs_read+0xee/0x120
[    2.567996]  ? __do_sys_finit_module+0xaa/0x110
[    2.567999]  __do_sys_finit_module+0xaa/0x110
[    2.568002]  do_syscall_64+0x63/0x410
[    2.568005]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    2.568008] RIP: 0033:0x7fa0749ce1ad
[    2.568012] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa
48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ab 5c 0c 00 f7 d8 64 89 01 48
[    2.568016] RSP: 002b:00007ffccbd4f658 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[    2.568020] RAX: ffffffffffffffda RBX: 000055db7a8092f0 RCX:
00007fa0749ce1ad
[    2.568022] RDX: 0000000000000000 RSI: 000055db7a812fa0 RDI:
000000000000000f
[    2.568025] RBP: 0000000000020000 R08: 0000000000000000 R09:
0000000000000007
[    2.568027] R10: 000000000000000f R11: 0000000000000246 R12:
000055db7a812fa0
[    2.568029] R13: 0000000000000000 R14: 000055db7a7fb160 R15:
000055db7a8092f0
[    2.568033] ---[ end trace 6f223c45fc8e7e98 ]---



Kind regards,
Udo

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