Backtrace

WARNING: CPU: 6 PID: 102843 at drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link.c:2546 dc_link_set_backlight_level+0x8a/0xf0 [amdgpu]
Modules linked in: ccm rfcomm 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 vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) cmac bnep sunrpc vfat fat btusb btrtl btbcm btintel ath10k_pci bluetooth ath10k_core snd_hda_codec_realtek edac_mce_amd uvcvideo mac80211 ecdh_generic snd_hda_codec_generic ecc snd_hda_codec_hdmi kvm_amd videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 snd_hda_intel videobuf2_common dell_laptop snd_intel_dspcfg videodev ledtrig_audio snd_hda_codec kvm dell_smm_hwmon snd_hda_core snd_hwdep mc snd_seq snd_seq_device ath irqbypass
 snd_pcm rapl dell_wmi dell_smbios dcdbas cfg80211 pcspkr dell_wmi_descriptor sparse_keymap snd_timer joydev wmi_bmof snd sp5100_tco k10temp i2c_piix4 ucsi_acpi soundcore libarc4 typec_ucsi typec dell_rbtn rfkill acpi_tad acpi_cpufreq ip_tables amdgpu hid_multitouch crct10dif_pclmul crc32_pclmul crc32c_intel iommu_v2 gpu_sched ghash_clmulni_intel i2c_algo_bit ttm drm_kms_helper serio_raw cec drm nvme ccp nvme_core r8169 wmi video pinctrl_amd i2c_hid fuse
CPU: 6 PID: 102843 Comm: systemd-sleep Tainted: G           OE     5.8.18-100.fc31.x86_64 #1
Hardware name: Dell Inc. Inspiron 5485/050HM7, BIOS 1.0.0 01/17/2019
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:ffff9fd30db6bd10 EFLAGS: 00010246
RAX: 0000000000000006 RBX: ffff8aecea68dc00 RCX: 0000000000000000
RDX: ffff8aec88521e70 RSI: ffff8aec88520000 RDI: 0000000000000004
RBP: ffff8aece3530000 R08: 0000000000000000 R09: ffff8aece35f6968
R10: ffff8aecf237ce10 R11: ffff8aecf8b2a370 R12: 000000000000ff01
R13: 0000000000000000 R14: 000000000000ffff R15: 0000000000000001
FS:  00007fbad724e940(0000) GS:ffff8aecf8b80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005578dcad10b8 CR3: 00000003eaee8000 CR4: 00000000003406e0
Call Trace:
 amdgpu_dm_backlight_update_status+0xb1/0xc0 [amdgpu]
 backlight_suspend+0x6a/0x80
 ? backlight_resume+0x80/0x80
 dpm_run_callback+0x4f/0x140
 __device_suspend+0x11c/0x4a0
 dpm_suspend+0x117/0x250
 hibernation_snapshot+0xaf/0x440
 hibernate.cold+0x97/0x217
 state_store+0xcb/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: 0033:0x7fbad81dc4a7
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:00007ffc54cb15a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fbad81dc4a7
RDX: 0000000000000005 RSI: 00007ffc54cb1690 RDI: 0000000000000004
RBP: 00007ffc54cb1690 R08: 0000000000000000 R09: 00005578dcad3ee0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00005578dcad12f0 R14: 0000000000000005 R15: 00007fbad82ad700