Backtrace

NETDEV WATCHDOG: enp0s20u4c4i2 (ipheth): transmit queue 0 timed out
WARNING: CPU: 1 PID: 0 at net/sched/sch_generic.c:442 dev_watchdog+0x24c/0x250
Modules linked in: joydev hidp uinput isofs rfcomm snd_seq_dummy snd_hrtimer nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter cmac bnep ipheth sunrpc nls_utf8 hfsplus b43 intel_rapl_msr intel_rapl_common cordic mac80211 x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_hda_codec_cirrus snd_hda_codec_generic cfg80211 ledtrig_audio btusb irqbypass snd_hda_codec_hdmi applesmc snd_hda_intel ssb snd_intel_dspcfg soundwire_intel soundwire_generic_allocation btrtl libarc4 snd_soc_core rapl btbcm intel_cstate btintel intel_uncore uvcvideo snd_compress bluetooth iTCO_wdt intel_pmc_bxt iTCO_vendor_support
 snd_pcm_dmaengine soundwire_cadence mei_hdcp snd_hda_codec ecdh_generic at24 videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common snd_hda_core rfkill i2c_i801 pcspkr ac97_bus i2c_smbus ecc snd_hwdep snd_seq videodev mc thunderbolt snd_seq_device snd_pcm snd_timer acpi_als snd kfifo_buf soundcore mei_me industrialio bcma apple_mfi_fastcharge mei apple_bl lpc_ich zram ip_tables uas usb_storage hid_apple nouveau mxm_wmi wmi i2c_algo_bit crct10dif_pclmul drm_ttm_helper ttm crc32_pclmul crc32c_intel drm_kms_helper ghash_clmulni_intel cec sdhci_pci drm cqhci sdhci tg3 mmc_core video fuse
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.11.3-300.fc34.x86_64 #1
Hardware name: Apple Inc. iMac13,2/Mac-FC02E91DDD3FA6A4, BIOS 291.0.0.0.0 04/12/2020
RIP: 0010:dev_watchdog+0x24c/0x250
Code: 6a 94 fd ff eb a9 4c 89 f7 c6 05 7c cc 4d 01 01 e8 b9 6a fa ff 44 89 e9 4c 89 f6 48 c7 c7 30 79 68 a1 48 89 c2 e8 51 86 16 00 <0f> 0b eb 8a 0f 1f 44 00 00 41 57 41 56 49 89 d6 41 55 4d 89 c5 41
RSP: 0018:ffffb2c0c00fcec0 EFLAGS: 00010282
RAX: 0000000000000043 RBX: 0000000000001388 RCX: 0000000000000027
RDX: ffff9c8bd7298ac8 RSI: 0000000000000001 RDI: ffff9c8bd7298ac0
RBP: ffff9c87537693dc R08: 0000000000000000 R09: ffffb2c0c00fccf0
R10: ffffb2c0c00fcce8 R11: ffffffffa1d44f08 R12: ffff9c8753769480
R13: 0000000000000000 R14: ffff9c8753769000 R15: ffff9c87532b0e80
FS:  0000000000000000(0000) GS:ffff9c8bd7280000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feea309e4aa CR3: 000000028ac10005 CR4: 00000000001706e0
Call Trace:
 <IRQ>
 ? pfifo_fast_enqueue+0x150/0x150
 call_timer_fn+0x29/0xf0
 __run_timers+0x1c8/0x230
 run_timer_softirq+0x19/0x30
 __do_softirq+0xd0/0x28f
 asm_call_irq_on_stack+0x12/0x20
 </IRQ>
 do_softirq_own_stack+0x37/0x40
 __irq_exit_rcu+0xbf/0x100
 sysvec_apic_timer_interrupt+0x36/0x80
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:poll_idle+0x30/0xb3
Code: 56 49 89 f6 41 55 41 89 d5 41 54 55 48 89 fd 53 65 8b 3d d3 bf 40 5f e8 3e 16 51 ff 80 65 00 fb 49 89 c4 fb 66 0f 1f 44 00 00 <65> 48 8b 1c 25 c0 7b 01 00 f0 80 4b 02 20 48 8b 03 a8 08 74 32 65
RSP: 0018:ffffb2c0c00b7e80 EFLAGS: 00000206
RAX: 00000b02e7ff3ef1 RBX: 0000000000000000 RCX: 000000000000001f
RDX: 0000000000000000 RSI: 000000002c3cfba0 RDI: 0000021a5817674e
RBP: ffff9c8bd72b5200 R08: 00000b02e7ff3ef1 R09: 0000000000000000
R10: 00000000000002db R11: 0000000000000000 R12: 00000b02e7ff3ef1
R13: 0000000000000000 R14: ffffffffa1e56da0 R15: 0000000000000000
 cpuidle_enter_state+0x89/0x350
 cpuidle_enter+0x29/0x40
 do_idle+0x1cc/0x270
 cpu_startup_entry+0x19/0x20
 secondary_startup_64_no_verify+0xc2/0xcb