enc28j60 random disconnects

Start with the enc28j60 and spi-gpio35-39-com device-tree overlays in the reported configuration, then investigate the dmesg “transmit queue 0 timed out” failure. Reproduce the disconnect over extended operation and use the supplied networking statistics and kernel version to narrow the cause. Done means the adapter remains connected without transmit timeouts.

Describe the bug
I use a enc28j60 ethernet module with spi on my CM3+. Sometimes it randomly disconnects (about once every day) with following error (dmesg):
eth0 (enc28j60): transmit queue 0 timed out

To reproduce

• use a enc28j60
• wait for ethernet to disconnect

Expected behaviour

• Work without disconnects

Actual behaviour

• Ethernet disconnects randomly

System
`System Information

Raspberry Pi Compute Module 3 Plus Rev 1.0
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
NAME="Raspbian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"

Raspberry Pi reference 2020-02-13
Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 5f884374b6ac6e155330c58caa1fb7249b8badf1, stage4

Linux raspberrypi 5.4.47-v7+ #1322 SMP Wed Jun 17 17:52:39 BST 2020 armv7l GNU/Linux
Revision : a02100
Serial : 000000001ef8fa95
Model : Raspberry Pi Compute Module 3 Plus Rev 1.0
Throttled flag : throttled=0x0
Camera : supported=0 detected=0

Videocore information

Jun 19 2020 15:44:36
Copyright (c) 2012 Broadcom
version 31eda665dcc45e61650a2ef018ef2cf94091c46f (clean) (release) (start)

alloc failures: 0
compactions: 0
legacy block fails: 0

Filesystem information

Dateisystem 1K-Blöcke Benutzt Verfügbar Verw% Eingehängt auf
/dev/root 7189324 5617380 1230756 83% /
devtmpfs 441236 0 441236 0% /dev
tmpfs 474516 0 474516 0% /dev/shm
tmpfs 474516 12352 462164 3% /run
tmpfs 5120 4 5116 1% /run/lock
tmpfs 474516 0 474516 0% /sys/fs/cgroup
/dev/mmcblk0p1 258095 54429 203666 22% /boot
tmpfs 94900 4 94896 1% /run/user/1000

Filename Type Size Used Priority
/var/swap file 102396 0 -2

Package version information

raspberrypi-ui-mods:
Installiert: 1.20200611
raspberrypi-sys-mods:
Installiert: 20200514
openbox:
Installiert: 3.6.1-8+rpt4
lxpanel:
Installiert: 0.10.0-2+rpt11
pcmanfm:
Installiert: 1.3.1-1+rpt22
rpd-plym-splash:
Installiert: 0.23

Networking Information

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet x.x.x.x netmask x.x.x.x broadcast x.x.x.x
inet6 y::y.y.y.y prefixlen 64 scopeid 0x20
ether m.m.m.m txqueuelen 1000 (Ethernet)
RX packets 93772 bytes 138396944 (131.9 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 30496 bytes 1923024 (1.8 MiB)
TX errors 35988 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 166

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet x.x.x.x netmask x.x.x.x
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Lokale Schleife)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

USB Information

/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 1: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M

config.txt

aphy_params_current=819
arm_freq=1200
audio_pwm_mode=514
config_hdmi_boost=5
core_freq=400
desired_osc_freq=0x387520
disable_commandline_tags=2
disable_l2cache=1
display_default_lcd=1
display_hdmi_rotate=-1
display_lcd_rotate=-1
dphy_params_current=547
dpi_group=2
dpi_mode=87
dpi_output_format=0x6f007
enable_dpi_lcd=1
enable_tvout=1
enable_uart=1
force_pwm_open=1
framebuffer_aspect=-1
framebuffer_height=445
framebuffer_ignore_alpha=1
framebuffer_swap=1
framebuffer_width=800
gpu_freq=300
ignore_lcd=1
init_uart_clock=0x2dc6c00
over_voltage_avs=56250
pause_burst_frames=1
program_serial_random=1
sdram_freq=450
total_mem=1024
hdmi_force_cec_address:0=65535
hdmi_force_cec_address:1=65535
hdmi_force_hotplug:0=1
hdmi_pixel_freq_limit:0=0x9a7ec80
device_tree=-
dpi_timings=800 0 40 48 88 480 0 13 3 32 0 0 0 60 0 32000000 6
overlay_prefix=overlays/
hdmi_cvt:0=
hdmi_cvt:1=
hdmi_edid_filename:0=
hdmi_edid_filename:1=
hdmi_timings:0=
hdmi_timings:1=

cmdline.txt

coherent_pool=1M snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_headphones=1 bcm2708_fb.fbwidth=800 bcm2708_fb.fbheight=445 bcm2708_fb.fbswap=1 smsc95xx.macaddr=B8:27:EB:F8:FA:95 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=ttyAMA0,115200 console=tty1 root=PARTUUID=ea7d04d6-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles

raspi-gpio settings

BANK0 (GPIO 0 to 27):
GPIO 0: level=0 fsel=6 alt=2 func=PCLK
GPIO 1: level=1 fsel=6 alt=2 func=DE
GPIO 2: level=1 fsel=6 alt=2 func=LCD_VSYNC
GPIO 3: level=0 fsel=6 alt=2 func=LCD_HSYNC
GPIO 4: level=0 fsel=6 alt=2 func=DPI_D0
GPIO 5: level=0 fsel=6 alt=2 func=DPI_D1
GPIO 6: level=0 fsel=6 alt=2 func=DPI_D2
GPIO 7: level=0 fsel=6 alt=2 func=DPI_D3
GPIO 8: level=0 fsel=6 alt=2 func=DPI_D4
GPIO 9: level=1 fsel=6 alt=2 func=DPI_D5
GPIO 10: level=0 fsel=6 alt=2 func=DPI_D6
GPIO 11: level=0 fsel=6 alt=2 func=DPI_D7
GPIO 12: level=1 fsel=6 alt=2 func=DPI_D8
GPIO 13: level=0 fsel=6 alt=2 func=DPI_D9
GPIO 14: level=1 fsel=6 alt=2 func=DPI_D10
GPIO 15: level=1 fsel=6 alt=2 func=DPI_D11
GPIO 16: level=0 fsel=6 alt=2 func=DPI_D12
GPIO 17: level=0 fsel=6 alt=2 func=DPI_D13
GPIO 18: level=0 fsel=6 alt=2 func=DPI_D14
GPIO 19: level=0 fsel=6 alt=2 func=DPI_D15
GPIO 20: level=0 fsel=6 alt=2 func=DPI_D16
GPIO 21: level=0 fsel=6 alt=2 func=DPI_D17
GPIO 22: level=1 fsel=6 alt=2 func=DPI_D18
GPIO 23: level=0 fsel=6 alt=2 func=DPI_D19
GPIO 24: level=0 fsel=6 alt=2 func=DPI_D20
GPIO 25: level=1 fsel=6 alt=2 func=DPI_D21
GPIO 26: level=1 fsel=6 alt=2 func=DPI_D22
GPIO 27: level=0 fsel=6 alt=2 func=DPI_D23
BANK1 (GPIO 28 to 45):
GPIO 28: level=0 fsel=6 alt=2 func=PCM_CLK
GPIO 29: level=0 fsel=6 alt=2 func=PCM_FS
GPIO 30: level=0 fsel=6 alt=2 func=PCM_DIN
GPIO 31: level=0 fsel=6 alt=2 func=PCM_DOUT
GPIO 32: level=0 fsel=1 func=OUTPUT
GPIO 33: level=0 fsel=0 func=INPUT
GPIO 34: level=1 fsel=0 func=INPUT
GPIO 35: level=1 fsel=0 func=INPUT
GPIO 36: level=1 fsel=1 func=OUTPUT
GPIO 37: level=0 fsel=4 alt=0 func=SPI0_MISO
GPIO 38: level=0 fsel=4 alt=0 func=SPI0_MOSI
GPIO 39: level=0 fsel=4 alt=0 func=SPI0_SCLK
GPIO 40: level=0 fsel=4 alt=0 func=PWM0
GPIO 41: level=1 fsel=1 func=OUTPUT
GPIO 42: level=1 fsel=0 func=INPUT
GPIO 43: level=1 fsel=1 func=OUTPUT
GPIO 44: level=1 fsel=5 alt=1 func=SDA0
GPIO 45: level=1 fsel=5 alt=1 func=SCL0
BANK2 (GPIO 46 to 53):
GPIO 46: level=1 fsel=0 func=INPUT
GPIO 47: level=1 fsel=1 func=OUTPUT
GPIO 48: level=0 fsel=4 alt=0 func=SD0_CLK
GPIO 49: level=1 fsel=4 alt=0 func=SD0_CMD
GPIO 50: level=1 fsel=4 alt=0 func=SD0_DAT0
GPIO 51: level=1 fsel=4 alt=0 func=SD0_DAT1
GPIO 52: level=1 fsel=4 alt=0 func=SD0_DAT2
GPIO 53: level=1 fsel=4 alt=0 func=SD0_DAT3

vcdbg log messages

001972.084: brfs: File read: /mfs/sd/config.txt
001973.010: brfs: File read: 637 bytes
002358.929: HDMI:EDID error reading EDID block 0 attempt 0
002720.908: HDMI:EDID error reading EDID block 0 attempt 1
003082.886: HDMI:EDID error reading EDID block 0 attempt 2
003444.864: HDMI:EDID error reading EDID block 0 attempt 3
003806.842: HDMI:EDID error reading EDID block 0 attempt 4
004168.820: HDMI:EDID error reading EDID block 0 attempt 5
004530.798: HDMI:EDID error reading EDID block 0 attempt 6
004892.776: HDMI:EDID error reading EDID block 0 attempt 7
005254.754: HDMI:EDID error reading EDID block 0 attempt 8
005616.732: HDMI:EDID error reading EDID block 0 attempt 9
005617.752: HDMI:EDID giving up on reading EDID block 0
005619.112: brfs: File read: /mfs/sd/config.txt
005619.943: gpioman: gpioman_get_pin_num: pin DISPLAY_SDA not defined
005619.974: gpioman: gpioman_get_pin_num: pin LEDS_PWR_OK not defined
005631.827: brfs: File read: 637 bytes
005636.898: gpioman: gpioman_get_pin_num: pin FLASH_0_ENABLE not defined
005636.926: gpioman: gpioman_get_pin_num: pin FLASH_0_INDICATOR not defined
005636.974: gpioman: gpioman_get_pin_num: pin FLASH_0_ENABLE not defined
005637.001: gpioman: gpioman_get_pin_num: pin FLASH_0_INDICATOR not defined
005637.046: gpioman: gpioman_get_pin_num: pin BT_ON not defined
005637.067: gpioman: gpioman_get_pin_num: pin WL_ON not defined
005670.105: gpioman: gpioman_get_pin_num: pin LEDS_PWR_OK not defined
005670.165: *** Restart logging
006031.768: hdmi: HDMI:EDID error reading EDID block 0 attempt 0
006393.751: hdmi: HDMI:EDID error reading EDID block 0 attempt 1
006755.733: hdmi: HDMI:EDID error reading EDID block 0 attempt 2
007117.716: hdmi: HDMI:EDID error reading EDID block 0 attempt 3
007479.699: hdmi: HDMI:EDID error reading EDID block 0 attempt 4
007841.682: hdmi: HDMI:EDID error reading EDID block 0 attempt 5
008203.665: hdmi: HDMI:EDID error reading EDID block 0 attempt 6
008565.647: hdmi: HDMI:EDID error reading EDID block 0 attempt 7
008927.630: hdmi: HDMI:EDID error reading EDID block 0 attempt 8
009289.612: hdmi: HDMI:EDID error reading EDID block 0 attempt 9
009290.636: hdmi: HDMI:EDID giving up on reading EDID block 0
009651.688: hdmi: HDMI:EDID error reading EDID block 0 attempt 0
010013.668: hdmi: HDMI:EDID error reading EDID block 0 attempt 1
010375.648: hdmi: HDMI:EDID error reading EDID block 0 attempt 2
010737.628: hdmi: HDMI:EDID error reading EDID block 0 attempt 3
011099.608: hdmi: HDMI:EDID error reading EDID block 0 attempt 4
011461.588: hdmi: HDMI:EDID error reading EDID block 0 attempt 5
011823.568: hdmi: HDMI:EDID error reading EDID block 0 attempt 6
012185.548: hdmi: HDMI:EDID error reading EDID block 0 attempt 7
012547.528: hdmi: HDMI:EDID error reading EDID block 0 attempt 8
012909.508: hdmi: HDMI:EDID error reading EDID block 0 attempt 9
012910.529: hdmi: HDMI:EDID giving up on reading EDID block 0
012916.079: HDMI0: hdmi_pixel_encoding: 162000000

012917.309: gpioman: gpioman_get_pin_num: pin CAMERA_0_SDA_PIN not defined
012917.332: gpioman: gpioman_get_pin_num: pin CAMERA_0_SCL_PIN not defined
012917.356: gpioman: gpioman_get_pin_num: pin CAMERA_0_I2C_PORT not defined
012917.389: dtb_file 'bcm2710-rpi-cm3.dtb'
012923.426: brfs: File read: /mfs/sd/bcm2710-rpi-cm3.dtb
012923.449: Loading 'bcm2710-rpi-cm3.dtb' to 0x100 size 0x66c6
012960.753: brfs: File read: 26310 bytes
012971.617: brfs: File read: /mfs/sd/overlays/overlay_map.dtb
013147.090: brfs: File read: 1371 bytes
013148.330: brfs: File read: /mfs/sd/config.txt
013148.968: brfs: File read: 637 bytes
013150.942: brfs: File read: /mfs/sd/overlays/dpi24.dtbo
013181.640: Loaded overlay 'dpi24'
013181.865: dtparam: spi=on
013275.385: brfs: File read: 975 bytes
013281.726: brfs: File read: /mfs/sd/overlays/spi-gpio35-39-com.dtbo
013309.956: Loaded overlay 'spi-gpio35-39-com'
013348.058: brfs: File read: 666 bytes
013351.716: brfs: File read: /mfs/sd/overlays/enc28j60.dtbo
013375.833: Loaded overlay 'enc28j60'
013375.850: dtparam: int_pin=35
013376.747: dtparam: i2c_vc=on
013497.305: brfs: File read: 1403 bytes
013502.001: brfs: File read: /mfs/sd/overlays/i2c0.dtbo
013525.695: Loaded overlay 'i2c0'
013525.713: dtparam: pins_44_45=1
013560.681: brfs: File read: 1396 bytes
013567.998: brfs: File read: /mfs/sd/overlays/comexioTouch.dtbo
013585.144: Loaded overlay 'comexioTouch'
013585.198: dtparam: audio=on
013657.923: brfs: File read: 779 bytes
013663.191: brfs: File read: /mfs/sd/overlays/pwm.dtbo
013682.419: Loaded overlay 'pwm'
013682.435: dtparam: pin=40
013682.726: dtparam: func=4
013683.061: dtparam: i2s=on
013752.983: brfs: File read: 985 bytes
013756.462: brfs: File read: /mfs/sd/overlays/i2s-gpio28-31.dtbo
013771.842: Loaded overlay 'i2s-gpio28-31'
013803.889: brfs: File read: 307 bytes
013804.997: brfs: File read: /mfs/sd/cmdline.txt
013805.056: Read command line from file 'cmdline.txt':
013805.079: 'console=serial0,115200 console=tty1 root=PARTUUID=ea7d04d6-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles'
015752.418: gpioman: gpioman_get_pin_num: pin WL_ON not defined
015768.438: brfs: File read: 166 bytes
016271.954: brfs: File read: /mfs/sd/kernel7.img
016271.977: Loading 'kernel7.img' to 0x8000 size 0x555b80
016272.007: Device tree loaded to 0x2eff9100 (size 0x6eee)
016272.903: gpioman: gpioman_get_pin_num: pin SDCARD_CONTROL_POWER not defined
019133.278: vchiq_core: vchiq_init_state: slot_zero = 0xf7580000, is_master = 1
019137.410: hdmi: HDMI:hdmi_get_state is deprecated, use hdmi_get_display_state instead
019142.592: TV service:host side not connected, dropping notification 0x00000002, 0x00000002, 0x00000004

dmesg log

[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 5.4.47-v7+ (dom@buildbot) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1322 SMP Wed Jun 17 17:52:39 BST 2020
[ 0.000000] CPU: ARMv7 Processor [410fd034] revision 4 (ARMv7), cr=10c5383d
[ 0.000000] CPU: div instructions available: patching division code
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] OF: fdt: Machine model: Raspberry Pi Compute Module 3 Plus Rev 1.0
[ 0.000000] Memory policy: Data cache writealloc
[ 0.000000] Reserved memory: created CMA memory pool at 0x37400000, size 64 MiB
[ 0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
[ 0.000000] On node 0 totalpages: 242688
[ 0.000000] Normal zone: 1896 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 242688 pages, LIFO batch:63
[ 0.000000] percpu: Embedded 20 pages/cpu s49792 r8192 d23936 u81920
[ 0.000000] pcpu-alloc: s49792 r8192 d23936 u81920 alloc=20*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 240792
[ 0.000000] Kernel command line: coherent_pool=1M snd_bcm2835.enable_compat_alsa=0 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_headphones=1 bcm2708_fb.fbwidth=800 bcm2708_fb.fbheight=445 bcm2708_fb.fbswap=1 smsc95xx.macaddr=m.m.m.m vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=ttyAMA0,115200 console=tty1 root=PARTUUID=ea7d04d6-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles
[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 882476K/970752K available (8192K kernel code, 680K rwdata, 2532K rodata, 1024K init, 824K bss, 22740K reserved, 65536K cma-reserved)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] ftrace: allocating 27907 entries in 55 pages
[ 0.000000] rcu: Hierarchical RCU implementation.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] random: get_random_bytes called from start_kernel+0x328/0x4e8 with crng_init=0
[ 0.000000] arch_timer: cp15 timer(s) running at 19.20MHz (phys).
[ 0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x46d987e47, max_idle_ns: 440795202767 ns
[ 0.000007] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 4398046511078ns
[ 0.000018] Switching to timer-based delay loop, resolution 52ns
[ 0.000276] Console: colour dummy device 80x30
[ 0.000303] printk: console [tty1] enabled
[ 0.000353] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=192000)
[ 0.000373] pid_max: default: 32768 minimum: 301
[ 0.000701] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.000722] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.001887] CPU: Testing write buffer coherency: ok
[ 0.002440] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[ 0.003375] Setting up static identity map for 0x100000 - 0x10003c
[ 0.003569] rcu: Hierarchical SRCU implementation.
[ 0.004249] smp: Bringing up secondary CPUs ...
[ 0.005359] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[ 0.006615] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[ 0.007767] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[ 0.007919] smp: Brought up 1 node, 4 CPUs
[ 0.007935] SMP: Total of 4 processors activated (153.60 BogoMIPS).
[ 0.007944] CPU: All CPU(s) started in HYP mode.
[ 0.007953] CPU: Virtualization extensions available.
[ 0.008886] devtmpfs: initialized
[ 0.025221] VFP support v0.3: implementor 41 architecture 3 part 40 variant 3 rev 4
[ 0.025487] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.025514] futex hash table entries: 1024 (order: 4, 65536 bytes, linear)
[ 0.028552] pinctrl core: initialized pinctrl subsystem
[ 0.029672] NET: Registered protocol family 16
[ 0.034047] DMA: preallocated 1024 KiB pool for atomic coherent allocations
[ 0.040298] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.
[ 0.040311] hw-breakpoint: maximum watchpoint size is 8 bytes.
[ 0.040537] Serial: AMBA PL011 UART driver
[ 0.042462] bcm2835-mbox 3f00b880.mailbox: mailbox enabled
[ 0.060097] raspberrypi-firmware soc:firmware: Attached to firmware from 2020-06-19 15:44, variant start
[ 0.070111] raspberrypi-firmware soc:firmware: Firmware hash is 31eda665dcc45e61650a2ef018ef2cf94091c46f
[ 0.120896] bcm2835-dma 3f007000.dma: DMA legacy API manager, dmachans=0x1
[ 0.123035] SCSI subsystem initialized
[ 0.123295] usbcore: registered new interface driver usbfs
[ 0.123356] usbcore: registered new interface driver hub
[ 0.123484] usbcore: registered new device driver usb
[ 0.125585] clocksource: Switched to clocksource arch_sys_counter
[ 1.283448] VFS: Disk quotas dquot_6.6.0
[ 1.283565] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 1.283745] FS-Cache: Loaded
[ 1.284015] CacheFiles: Loaded
[ 1.295168] thermal_sys: Registered thermal governor 'step_wise'
[ 1.295559] NET: Registered protocol family 2
[ 1.296497] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[ 1.296537] TCP established hash table entries: 8192 (order: 3, 32768 bytes, linear)
[ 1.296652] TCP bind hash table entries: 8192 (order: 4, 65536 bytes, linear)
[ 1.296841] TCP: Hash tables configured (established 8192 bind 8192)
[ 1.297004] UDP hash table entries: 512 (order: 2, 16384 bytes, linear)
[ 1.297056] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes, linear)
[ 1.297344] NET: Registered protocol family 1
[ 1.298118] RPC: Registered named UNIX socket transport module.
[ 1.298129] RPC: Registered udp transport module.
[ 1.298139] RPC: Registered tcp transport module.
[ 1.298148] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 1.300012] hw perfevents: enabled with armv7_cortex_a7 PMU driver, 7 counters available
[ 1.303245] Initialise system trusted keyrings
[ 1.303484] workingset: timestamp_bits=30 max_order=18 bucket_order=0
[ 1.313901] FS-Cache: Netfs 'nfs' registered for caching
[ 1.314543] NFS: Registering the id_resolver key type
[ 1.314578] Key type id_resolver registered
[ 1.314588] Key type id_legacy registered
[ 1.314608] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 1.315863] Key type asymmetric registered
[ 1.315875] Asymmetric key parser 'x509' registered
[ 1.315925] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249)
[ 1.315938] io scheduler mq-deadline registered
[ 1.315949] io scheduler kyber registered
[ 1.321528] bcm2708_fb soc:fb: FB found 1 display(s)
[ 1.329596] Console: switching to colour frame buffer device 100x27
[ 1.335749] bcm2708_fb soc:fb: Registered framebuffer for display 0, size 800x445
[ 1.340698] bcm2835-rng 3f104000.rng: hwrng registered
[ 1.341230] vc-mem: phys_addr:0x00000000 mem_base=0x3ec00000 mem_size:0x40000000(1024 MiB)
[ 1.341908] vc-sm: Videocore shared memory driver
[ 1.342370] gpiomem-bcm2835 3f200000.gpiomem: Initialised: Registers at 0x3f200000
[ 1.353834] brd: module loaded
[ 1.365491] loop: module loaded
[ 1.366875] Loading iSCSI transport class v2.0-870.
[ 1.367763] libphy: Fixed MDIO Bus: probed
[ 1.367870] usbcore: registered new interface driver lan78xx
[ 1.367931] usbcore: registered new interface driver smsc95xx
[ 1.367954] dwc_otg: version 3.00a 10-AUG-2012 (platform bus)
[ 2.096156] Core Release: 2.80a
[ 2.096170] Setting default values for core params
[ 2.096204] Finished setting default values for core params
[ 2.296597] Using Buffer DMA mode
[ 2.296608] Periodic Transfer Interrupt Enhancement - disabled
[ 2.296617] Multiprocessor Interrupt Enhancement - disabled
[ 2.296628] OTG VER PARAM: 0, OTG VER FLAG: 0
[ 2.296690] Dedicated Tx FIFOs mode
[ 2.297310] WARN::dwc_otg_hcd_init:1074: FIQ DMA bounce buffers: virt = b7504000 dma = 0xf7504000 len=9024
[ 2.297340] FIQ FSM acceleration enabled for :
Non-periodic Split Transactions
Periodic Split Transactions
High-Speed Isochronous Endpoints
Interrupt/Control Split Transaction hack enabled
[ 2.297352] dwc_otg: Microframe scheduler enabled
[ 2.297418] WARN::hcd_init_fiq:457: FIQ on core 1
[ 2.297428] WARN::hcd_init_fiq:458: FIQ ASM at 806bc490 length 36
[ 2.297439] WARN::hcd_init_fiq:497: MPHI regs_base at bb810000
[ 2.297459] dwc_otg 3f980000.usb: DWC OTG Controller
[ 2.297496] dwc_otg 3f980000.usb: new USB bus registered, assigned bus number 1
[ 2.297541] dwc_otg 3f980000.usb: irq 56, io mem 0x00000000
[ 2.297594] Init: Port Power? op_state=1
[ 2.297604] Init: Power Port (0)
[ 2.297971] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.04
[ 2.297987] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.298001] usb usb1: Product: DWC OTG Controller
[ 2.298015] usb usb1: Manufacturer: Linux 5.4.47-v7+ dwc_otg_hcd
[ 2.298028] usb usb1: SerialNumber: 3f980000.usb
[ 2.298755] hub 1-0:1.0: USB hub found
[ 2.298818] hub 1-0:1.0: 1 port detected
[ 2.299571] dwc_otg: FIQ enabled
[ 2.299581] dwc_otg: NAK holdoff enabled
[ 2.299591] dwc_otg: FIQ split-transaction FSM enabled
[ 2.299605] Module dwc_common_port init
[ 2.299925] usbcore: registered new interface driver usb-storage
[ 2.300167] mousedev: PS/2 mouse device common for all mice
[ 2.301632] bcm2835-wdt bcm2835-wdt: Broadcom BCM2835 watchdog timer
[ 2.303822] sdhci: Secure Digital Host Controller Interface driver
[ 2.303831] sdhci: Copyright(c) Pierre Ossman
[ 2.304483] sdhost-bcm2835 3f202000.mmc: could not get clk, deferring probe
[ 2.304736] sdhci-pltfm: SDHCI platform and OF driver helper
[ 2.305432] ledtrig-cpu: registered to indicate activity on CPUs
[ 2.305529] hidraw: raw HID events driver (C) Jiri Kosina
[ 2.305724] usbcore: registered new interface driver usbhid
[ 2.305733] usbhid: USB HID core driver
[ 2.306742] vchiq: vchiq_init_state: slot_zero = (ptrval)
[ 2.308491] [vc_sm_connected_init]: start
[ 2.317274] [vc_sm_connected_init]: end - returning 0
[ 2.319030] Initializing XFRM netlink socket
[ 2.319066] NET: Registered protocol family 17
[ 2.319203] Key type dns_resolver registered
[ 2.320004] Registering SWP/SWPB emulation handler
[ 2.320373] registered taskstats version 1
[ 2.320393] Loading compiled-in X.509 certificates
[ 2.320860] Key type ._fscrypt registered
[ 2.320871] Key type .fscrypt registered
[ 2.331275] uart-pl011 3f201000.serial: cts_event_workaround enabled
[ 2.331368] 3f201000.serial: ttyAMA0 at MMIO 0x3f201000 (irq = 81, base_baud = 0) is a PL011 rev2
[ 2.331439] printk: console [ttyAMA0] enabled
[ 2.333194] bcm2835-power bcm2835-power: Broadcom BCM2835 power domains driver
[ 2.334631] sdhost: log_buf @ (ptrval) (f7507000)
[ 2.382651] mmc0: sdhost-bcm2835 loaded - DMA enabled (>1)
[ 2.385217] of_cfs_init
[ 2.385490] of_cfs_init: OK
[ 2.386500] Waiting for root device PARTUUID=ea7d04d6-02...
[ 2.477095] mmc0: new high speed MMC card at address 0001
[ 2.478061] mmcblk0: mmc0:0001 8GTF4R 7.28 GiB
[ 2.478411] mmcblk0boot0: mmc0:0001 8GTF4R partition 1 4.00 MiB
[ 2.478766] mmcblk0boot1: mmc0:0001 8GTF4R partition 2 4.00 MiB
[ 2.479064] mmcblk0rpmb: mmc0:0001 8GTF4R partition 3 512 KiB, chardev (245:0)
[ 2.481362] mmcblk0: p1 p2
[ 2.507763] EXT4-fs (mmcblk0p2): INFO: recovery required on readonly filesystem
[ 2.507780] EXT4-fs (mmcblk0p2): write access will be enabled during recovery
[ 2.515737] Indeed it is in host mode hprt0 = 00041901
[ 2.674796] random: fast init done
[ 2.725635] usb 1-1: new low-speed USB device number 2 using dwc_otg
[ 2.726534] Indeed it is in host mode hprt0 = 00041901
[ 2.971459] usb 1-1: New USB device found, idVendor=046d, idProduct=c31c, bcdDevice=64.02
[ 2.971476] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 2.971490] usb 1-1: Product: USB Keyboard
[ 2.971504] usb 1-1: Manufacturer: Logitech
[ 2.979700] input: Logitech USB Keyboard as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1:1.0/0003:046D:C31C.0001/input/input0
[ 3.046514] hid-generic 0003:046D:C31C.0001: input,hidraw0: USB HID v1.10 Keyboard [Logitech USB Keyboard] on usb-3f980000.usb-1/input0
[ 3.056978] input: Logitech USB Keyboard Consumer Control as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1:1.1/0003:046D:C31C.0002/input/input1
[ 3.125894] input: Logitech USB Keyboard System Control as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1:1.1/0003:046D:C31C.0002/input/input2
[ 3.126373] hid-generic 0003:046D:C31C.0002: input,hiddev96,hidraw1: USB HID v1.10 Device [Logitech USB Keyboard] on usb-3f980000.usb-1/input1
[ 3.343210] EXT4-fs (mmcblk0p2): orphan cleanup on readonly fs
[ 3.348066] EXT4-fs (mmcblk0p2): 6 orphan inodes deleted
[ 3.348079] EXT4-fs (mmcblk0p2): recovery complete
[ 3.357927] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[ 3.358022] VFS: Mounted root (ext4 filesystem) readonly on device 179:2.
[ 3.359246] devtmpfs: mounted
[ 3.366109] Freeing unused kernel memory: 1024K
[ 3.386013] Run /sbin/init as init process
[ 3.936745] systemd[1]: System time before build time, advancing clock.
[ 4.089490] NET: Registered protocol family 10
[ 4.090947] Segment Routing with IPv6
[ 4.122470] systemd[1]: systemd 241 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid)
[ 4.123462] systemd[1]: Detected architecture arm.
[ 4.199124] systemd[1]: Set hostname to .
[ 4.358518] uart-pl011 3f201000.serial: no DMA platform data
[ 5.116134] random: systemd: uninitialized urandom read (16 bytes read)
[ 5.130069] random: systemd: uninitialized urandom read (16 bytes read)
[ 5.133262] systemd[1]: Created slice system-serial\x2dgetty.slice.
[ 5.133617] random: systemd: uninitialized urandom read (16 bytes read)
[ 5.134202] systemd[1]: Listening on udev Kernel Socket.
[ 5.134979] systemd[1]: Listening on Journal Socket (/dev/log).
[ 5.135778] systemd[1]: Listening on udev Control Socket.
[ 5.162415] systemd[1]: Condition check resulted in Journal Audit Socket being skipped.
[ 5.164043] systemd[1]: Created slice system-getty.slice.
[ 5.164523] systemd[1]: Listening on initctl Compatibility Named Pipe.
[ 5.368109] i2c /dev entries driver
[ 5.854442] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
[ 5.979273] systemd-journald[100]: Received request to flush runtime journal from PID 1
[ 6.562200] vc_sm_cma: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.564970] bcm2835_vc_sm_cma_probe: Videocore shared memory driver
[ 6.564993] [vc_sm_connected_init]: start
[ 6.570790] mc: Linux media interface: v0.10
[ 6.571871] [vc_sm_connected_init]: installed successfully
[ 6.633687] videodev: Linux video capture interface: v2.00
[ 6.710406] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.734086] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.734975] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.738229] bcm2835_audio bcm2835_audio: card created with 8 channels
[ 6.758959] bcm2835_isp: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.759703] bcm2835_v4l2: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.762450] bcm2835_codec: module is from the staging directory, the quality is unknown, you have been warned.
[ 6.788314] bcm2835-isp bcm2835-isp: bcm2835_isp_get_supported_fmts: port has more encoding than we provided space for. Some are dropped.
[ 6.791841] bcm2835-isp bcm2835-isp: Device node output[0] registered as /dev/video13
[ 6.797592] bcm2835-isp bcm2835-isp: Device node capture[0] registered as /dev/video14
[ 6.809676] bcm2835-isp bcm2835-isp: Device node capture[1] registered as /dev/video15
[ 6.821394] bcm2835-isp bcm2835-isp: Device node stats[2] registered as /dev/video16
[ 6.821435] bcm2835-isp bcm2835-isp: Register output node 0 with media controller
[ 6.821457] bcm2835-isp bcm2835-isp: Register capture node 1 with media controller
[ 6.821526] bcm2835-isp bcm2835-isp: Register capture node 2 with media controller
[ 6.821545] bcm2835-isp bcm2835-isp: Register capture node 3 with media controller
[ 6.822035] bcm2835-isp bcm2835-isp: Loaded V4L2 bcm2835-isp
[ 6.833714] bcm2835-codec bcm2835-codec: Device registered as /dev/video10
[ 6.833780] bcm2835-codec bcm2835-codec: Loaded V4L2 decode
[ 6.849266] bcm2835-codec bcm2835-codec: Device registered as /dev/video11
[ 6.849361] bcm2835-codec bcm2835-codec: Loaded V4L2 encode
[ 6.860068] : bcm2835_codec_get_supported_fmts: port has more encoding than we provided space for. Some are dropped.
[ 6.861123] bcm2835-codec bcm2835-codec: Device registered as /dev/video12
[ 6.861175] bcm2835-codec bcm2835-codec: Loaded V4L2 isp
[ 7.095720] i2c i2c-11: Added multiplexed i2c bus 0
[ 7.096240] i2c i2c-11: Added multiplexed i2c bus 10
[ 8.305677] enc28j60 spi0.0: Ethernet driver 1.02 loaded
[ 8.755394] input: generic ft5x06 (79) as /devices/platform/soc/3f205000.i2c/i2c-11/i2c-0/0-0038/input/input3
[ 9.929606] random: crng init done
[ 9.929630] random: 7 urandom warning(s) missed due to ratelimiting
[ 9.999395] 8021q: 802.1Q VLAN Support v1.8
[ 10.314932] cfg80211: Loading compiled-in X.509 certificates for regulatory database
[ 10.447899] cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
[ 10.506299] Adding 102396k swap on /var/swap. Priority:-2 extents:1 across:102396k SSFS
[ 10.622769] enc28j60 spi0.0 eth0: link down
[ 10.622814] enc28j60 spi0.0 eth0: multicast mode
[ 10.623032] enc28j60 spi0.0 eth0: multicast mode
[ 10.663982] enc28j60 spi0.0 eth0: multicast mode
[ 10.664228] enc28j60 spi0.0 eth0: multicast mode
[ 10.763027] enc28j60 spi0.0 eth0: multicast mode
[ 10.763471] enc28j60 spi0.0 eth0: multicast mode
[ 11.578224] enc28j60 spi0.0 eth0: link up - Half duplex
[ 11.578465] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 11.596351] enc28j60 spi0.0 eth0: multicast mode
[ 11.596834] enc28j60 spi0.0 eth0: multicast mode
[ 15.234169] fuse: init (API version 7.31)
[ 17.260989] enc28j60 spi0.0 eth0: multicast mode
[ 2536.102591] ------------[ cut here ]------------
[ 2536.102624] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:448 dev_watchdog+0x310/0x314
[ 2536.102633] NETDEV WATCHDOG: eth0 (enc28j60): transmit queue 0 timed out
[ 2536.102641] Modules linked in: fuse sha256_generic libsha256 cfg80211 rfkill 8021q garp stp llc edt_ft5x06 enc28j60 spidev joydev evdev raspberrypi_hwmon i2c_mux_pinctrl i2c_mux snd_soc_bcm2835_i2s pwm_bcm2835 i2c_bcm2835 spi_bcm2835 snd_soc_core snd_compress bcm2835_codec(C) bcm2835_v4l2(C) bcm2835_isp(C) v4l2_mem2mem bcm2835_mmal_vchiq(C) videobuf2_dma_contig videobuf2_vmalloc snd_bcm2835(C) videobuf2_memops videobuf2_v4l2 snd_pcm_dmaengine snd_pcm videobuf2_common snd_timer snd videodev mc vc_sm_cma(C) uio_pdrv_genirq uio fixed i2c_dev ip_tables x_tables ipv6 nf_defrag_ipv6
[ 2536.102814] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G C 5.4.47-v7+ #1322
[ 2536.102818] Hardware name: BCM2835
[ 2536.102822] Backtrace:
[ 2536.102838] [<8010d458>] (dump_backtrace) from [<8010d750>] (show_stack+0x20/0x24)
[ 2536.102847] r6:80d00000 r5:00000000 r4:80d93c74 r3:c8851a02
[ 2536.102859] [<8010d730>] (show_stack) from [<808b08c4>] (dump_stack+0xe0/0x124)
[ 2536.102870] [<808b07e4>] (dump_stack) from [<8011fd24>] (__warn+0xec/0x104)
[ 2536.102880] r8:000001c0 r7:00000009 r6:80b0b594 r5:00000000 r4:80d01cec r3:c8851a02
[ 2536.102890] [<8011fc38>] (__warn) from [<8011fdc0>] (warn_slowpath_fmt+0x84/0xc0)
[ 2536.102900] r9:80b0b594 r8:000001c0 r7:807be45c r6:00000009 r5:80b0b5ac r4:80d04f48
[ 2536.102911] [<8011fd40>] (warn_slowpath_fmt) from [<807be45c>] (dev_watchdog+0x310/0x314)
[ 2536.102921] r9:00036978 r8:b5ed4000 r7:00000000 r6:80d03d00 r5:b5ed42a8 r4:00000000
[ 2536.102936] [<807be14c>] (dev_watchdog) from [<8019b61c>] (call_timer_fn+0x40/0x180)
[ 2536.102945] r8:807be14c r7:00000100 r6:80d00000 r5:b5ed42a8 r4:b6c12440
[ 2536.102958] [<8019b5dc>] (call_timer_fn) from [<8019c76c>] (run_timer_softirq+0x288/0x654)
[ 2536.102968] r9:00000000 r8:b5ed42a8 r7:80d00000 r6:00036978 r5:80d01dc4 r4:b6c12440
[ 2536.102980] [<8019c4e4>] (run_timer_softirq) from [<8010249c>] (__do_softirq+0x1a4/0x418)
[ 2536.102990] r10:00000004 r9:00000082 r8:b649d000 r7:00000100 r6:80d00000 r5:00000001
[ 2536.102994] r4:80d03084
[ 2536.103006] [<801022f8>] (__do_softirq) from [<80125b78>] (irq_exit+0x100/0x110)
[ 2536.103015] r10:b73ff840 r9:80d00000 r8:b649d000 r7:00000001 r6:00000000 r5:00000000
[ 2536.103020] r4:80ca12a4
[ 2536.103032] [<80125a78>] (irq_exit) from [<80180a50>] (__handle_domain_irq+0x70/0xc4)
[ 2536.103043] [<801809e0>] (__handle_domain_irq) from [<80102228>] (bcm2836_arm_irqchip_handle_irq+0x60/0xa4)
[ 2536.103053] r8:80d990bc r7:80d01f0c r6:ffffffff r5:60000013 r4:00000000 r3:80d01ed8
[ 2536.103063] [<801021c8>] (bcm2836_arm_irqchip_handle_irq) from [<80101a3c>] (__irq_svc+0x5c/0x7c)
[ 2536.103068] Exception stack(0x80d01ed8 to 0x80d01f20)
[ 2536.103075] 1ec0: 80109b94 00000000
[ 2536.103084] 1ee0: 60000093 8011a2e0 80d04f68 80d00000 80d04fb0 00000001 80d990bc 80c67a40
[ 2536.103094] 1f00: b73ff840 80d01f34 80d0535c 80d01f28 00000000 80109b98 60000013 ffffffff
[ 2536.103100] r4:80109b98 r3:c8851a02
[ 2536.103113] [<80109b64>] (arch_cpu_idle) from [<808d1224>] (default_idle_call+0x34/0x48)
[ 2536.103123] [<808d11f0>] (default_idle_call) from [<80153418>] (do_idle+0xec/0x170)
[ 2536.103132] [<8015332c>] (do_idle) from [<80153778>] (cpu_startup_entry+0x28/0x2c)
[ 2536.103142] r8:00000000 r7:80c67a40 r6:80daa200 r5:80daa258 r4:000000ce r3:80d01f50
[ 2536.103154] [<80153750>] (cpu_startup_entry) from [<808cab48>] (rest_init+0xbc/0xc0)
[ 2536.103169] [<808caa8c>] (rest_init) from [<80c00bd8>] (arch_call_rest_init+0x18/0x1c)
[ 2536.103175] r4:80d04f48 r3:80c96260
[ 2536.103187] [<80c00bc0>] (arch_call_rest_init) from [<80c01090>] (start_kernel+0x4b4/0x4e8)
[ 2536.103198] [<80c00bdc>] (start_kernel) from [<00000000>] (0x0)
[ 2536.103204] ---[ end trace 694e100ebaed3721 ]---
[ 2536.137096] enc28j60 spi0.0 eth0: link down
[ 2536.174263] enc28j60 spi0.0 eth0: multicast mode
[ 2536.174817] enc28j60 spi0.0 eth0: multicast mode
[ 2536.199726] enc28j60 spi0.0 eth0: link up - Half duplex
[ 2536.223212] enc28j60 spi0.0 eth0: multicast mode
[ 2536.370228] enc28j60 spi0.0 eth0: multicast mode
[ 2536.370387] enc28j60 spi0.0 eth0: multicast mode
[ 2542.255617] enc28j60 spi0.0 eth0: multicast mode
`

Logs
see above

Additional context
I tested it with the current stable kernel and i testet it with the new kernel. Both have the same Problem.
While i was searching i found a forum post https://www.raspberrypi.org/forums/viewtopic.php?t=232969. It doesn't contain any answer and no link to any bugreport.

I hope this is the right way of reporting this and i am sorry for any inconvenience. Feel free to correct me or ask for any additional information.