Backtrace

WARNING: CPU: 0 PID: 12 at drivers/net/wireless/mediatek/mt7601u/dma.c:306 mt7601u_dma_enqueue_tx+0x20d/0x230 [mt7601u]
Modules linked in: vfat fat uas usb_storage uinput 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 ccm 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 sunrpc snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation snd_soc_core snd_compress snd_pcm_dmaengine uvcvideo soundwire_cadence mt7601u snd_hda_codec b43 snd_hda_core videobuf2_vmalloc ac97_bus cordic intel_rapl_msr intel_rapl_common mac80211 videobuf2_memops snd_hwdep videobuf2_v4l2 snd_seq videobuf2_common cfg80211 x86_pkg_temp_thermal videodev dell_rbtn ssb dell_laptop intel_powerclamp
 snd_seq_device mc libarc4 ledtrig_audio coretemp rfkill kvm_intel snd_pcm snd_timer kvm snd dell_smm_hwmon mei_hdcp soundcore iTCO_wdt intel_pmc_bxt irqbypass iTCO_vendor_support ppdev at24 rapl dell_wmi intel_cstate dell_smbios intel_uncore sparse_keymap dcdbas pcspkr parport_pc wmi_bmof dell_wmi_descriptor joydev parport mei_me mei i2c_i801 lpc_ich i2c_smbus bcma dell_smo8800 zram ip_tables i915 sdhci_pci cqhci crct10dif_pclmul sdhci crc32_pclmul crc32c_intel mmc_core i2c_algo_bit ghash_clmulni_intel drm_kms_helper tg3 serio_raw cec firewire_ohci drm wmi firewire_core crc_itu_t ata_generic pata_acpi video fuse
CPU: 0 PID: 12 Comm: ksoftirqd/0 Tainted: G        W         5.11.12-300.fc34.x86_64 #1
Hardware name: Dell Inc. Latitude E5420/006X7M, BIOS A14 12/26/2013
RIP: 0010:mt7601u_dma_enqueue_tx+0x20d/0x230 [mt7601u]
Code: e8 e8 69 d2 c6 85 c0 75 38 41 8b 55 74 41 8b 85 b8 00 00 00 85 d2 75 27 01 d8 41 01 5d 70 41 89 85 b8 00 00 00 e9 64 fe ff ff <0f> 0b 4c 89 fe 4c 89 e7 41 be e4 ff ff ff e8 70 88 f6 c6 eb a5 0f
RSP: 0018:ffffae6780083a58 EFLAGS: 00010046
RAX: 0000000000000040 RBX: ffff8d0dcaf5c868 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffff8d0dc62f9800 RDI: ffff8d0dc5ad65b4
RBP: ffff8d0dc5ad5f20 R08: 0000000000000202 R09: ffff8d0de3032940
R10: be7cd8732b501056 R11: ffff8d0dc5ad6510 R12: ffff8d0dc5ad65b4
R13: ffff8d0dc6a24200 R14: 00000000c0028300 R15: 0000000000000282
FS:  0000000000000000(0000) GS:ffff8d0deaa00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000033d705102000 CR3: 00000000b9a10001 CR4: 00000000000606f0
Call Trace:
 mt7601u_tx+0x245/0x330 [mt7601u]
 ieee80211_tx_frags+0x15f/0x220 [mac80211]
 __ieee80211_tx+0x76/0x140 [mac80211]
 ieee80211_tx+0xc7/0x110 [mac80211]
 __ieee80211_subif_start_xmit+0x8a6/0xe80 [mac80211]
 ? enqueue_task_fair+0x8a/0x6a0
 ? psi_task_change+0x84/0xc0
 ? activate_task+0x4a/0x120
 ? attach_task+0x2f/0x50
 ? check_preempt_curr+0x2f/0x70
 ? csum_partial+0xd/0x20
 ? __skb_checksum+0x6c/0x2e0
 ieee80211_subif_start_xmit+0x3b/0x2d0 [mac80211]
 ? skb_checksum+0x22/0x30
 ? skb_send_sock_locked+0x1e0/0x1e0
 ? skb_checksum_help+0xa6/0x120
 dev_hard_start_xmit+0xca/0x1e0
 sch_direct_xmit+0xeb/0x2f0
 __qdisc_run+0x149/0x550
 net_tx_action+0x10d/0x230
 __do_softirq+0xd0/0x28f
 run_ksoftirqd+0x26/0x40
 smpboot_thread_fn+0xc5/0x160
 ? smpboot_register_percpu_thread+0xf0/0xf0
 kthread+0x11b/0x140
 ? kthread_associate_blkcg+0xa0/0xa0
 ret_from_fork+0x22/0x30