Backtrace

WARNING: CPU: 1 PID: 16721 at drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:2546 dc_link_set_backlight_level+0x8a/0xf0 [amdgpu]
Modules linked in: rfcomm ccm xt_CHECKSUM xt_MASQUERADE nf_nat_tftp nf_conntrack_tftp tun bridge stp llc nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_REJECT nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ebtable_broute ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter cmac bnep sunrpc vfat fat edac_mce_amd uvcvideo kvm_amd kvm snd_acp3x_rn videobuf2_vmalloc snd_soc_dmic videobuf2_memops videobuf2_v4l2 videobuf2_common ath10k_pci snd_acp3x_pdm_dma snd_soc_core snd_hda_codec_realtek btusb snd_compress snd_hda_codec_generic ath10k_core ac97_bus btrtl ledtrig_audio snd_pcm_dmaengine snd_hda_codec_hdmi btbcm snd_hda_intel btintel snd_intel_dspcfg irqbypass rapl snd_hda_codec videodev bluetooth mac80211 mc wmi_bmof snd_hda_core pcspkr
 snd_hwdep joydev snd_seq sp5100_tco snd_seq_device ath ecdh_generic ecc snd_pcm k10temp i2c_piix4 cfg80211 snd_timer snd snd_rn_pci_acp3x soundcore snd_pci_acp3x libarc4 ideapad_laptop sparse_keymap rfkill acpi_cpufreq ip_tables dm_crypt amdgpu iommu_v2 gpu_sched i2c_algo_bit ttm drm_kms_helper cec hid_multitouch hid_logitech_hidpp drm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel ccp sdhci_pci nvme cqhci serio_raw sdhci nvme_core mmc_core wmi video pinctrl_amd i2c_hid hid_logitech_dj fuse
CPU: 1 PID: 16721 Comm: systemd-sleep Tainted: G        W         5.8.18-100.fc31.x86_64 #1
Hardware name: LENOVO 81NB/LNVNB161216, BIOS AMCN25WW(V1.08) 07/25/2019
RIP: 0010:dc_link_set_backlight_level+0x8a/0xf0 [amdgpu]
Code: 30 03 00 00 31 c0 48 8d 96 c0 01 00 00 48 8b 0a 48 85 c9 74 06 48 3b 59 08 74 20 83 c0 01 48 81 c2 c8 04 00 00 83 f8 06 75 e3 <0f> 0b 45 31 e4 5b 44 89 e0 5d 41 5c 41 5d 41 5e c3 48 98 48 69 c0
RSP: 0018:ffffac5343757cd0 EFLAGS: 00010246
RAX: 0000000000000006 RBX: ffff97b03c5b4c00 RCX: 0000000000000000
RDX: ffff97afa7a21e70 RSI: ffff97afa7a20000 RDI: 0000000000000004
RBP: ffff97b039110000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000004f01
R13: 0000000000000000 R14: 0000000000004f4f R15: 0000000000000010
FS:  00007effb5444940(0000) GS:ffff97b048a40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8ec0e12e76 CR3: 000000012976c000 CR4: 00000000003406e0
Call Trace:
 amdgpu_dm_backlight_update_status+0xb1/0xc0 [amdgpu]
 backlight_resume+0x6a/0x80
 ? brightness_store+0x50/0x50
 dpm_run_callback+0x4f/0x140
 device_resume+0xa7/0x200
 dpm_resume+0xce/0x2e0
 dpm_resume_end+0xd/0x20
 suspend_devices_and_enter+0x291/0x7d0
 pm_suspend.cold+0x333/0x386
 state_store+0x71/0xd0
 kernfs_fop_write+0xce/0x1b0
 vfs_write+0xc7/0x1f0
 ksys_write+0x4f/0xc0
 do_syscall_64+0x4d/0x90
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7effb63d24a7
Code: 64 89 02 48 c7 c0 ff ff ff ff eb bb 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
RSP: 002b:00007fff6d946438 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007effb63d24a7
RDX: 0000000000000004 RSI: 00007fff6d946520 RDI: 0000000000000004
RBP: 00007fff6d946520 R08: 0000000000000000 R09: 0000556a53dbaf40
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000556a53db82d0 R14: 0000000000000004 R15: 00007effb64a3700