R7800 - Is my HW dying?

Hi,

Had an interesting but a bit concerning problem this morning when started WFH.
While box was up and running I had no wireless or wired connection.

Fortunately it was still updating to rsyslog in my NAS so was able to collect logs as in the below gist.

Please note the starting and the oldest logs are at the bottom of the file.

Based on this log are we able to make an educated guess whether my R7800 HW (nand??) is finally giving up?

Had to give power restart to recover and at least it seems to boot normally.

dmesg
root@R7800:~# dmesg
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 5.10.100 (gram@HIMA-Debian) (arm-openwrt-linux-muslgnueabi-gcc (OpenWrt GCC 11.2.0 r18974+22-8144f9c665) 11.2.0, GNU ld (GNU Binutils) 2.37) #0 SMP Sat Feb 26 08:50:23 2022
[    0.000000] CPU: ARMv7 Processor [512f04d0] revision 0 (ARMv7), cr=10c5787d
[    0.000000] CPU: div instructions available: patching division code
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
[    0.000000] OF: fdt: Machine model: Netgear Nighthawk X4S R7800
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000042000000-0x000000005fffffff]
[    0.000000]   HighMem  empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000042000000-0x000000005fffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000042000000-0x000000005fffffff]
[    0.000000] On node 0 totalpages: 122880
[    0.000000]   Normal zone: 1080 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 122880 pages, LIFO batch:31
[    0.000000] percpu: Embedded 19 pages/cpu s47436 r8192 d22196 u77824
[    0.000000] pcpu-alloc: s47436 r8192 d22196 u77824 alloc=19*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 121800
[    0.000000] Kernel command line:
[    0.000000] Bootloader command line (ignored): console=ttyHSL1,115200n8
[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory: 471812K/491520K available (7231K kernel code, 859K rwdata, 1820K rodata, 1024K init, 245K bss, 19708K reserved, 0K cma-reserved, 0K highmem)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000]  Tracing variant of Tasks RCU enabled.
[    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+0x414/0x5c4 with crng_init=0
[    0.000000] clocksource: dg_timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 305801671480 ns
[    0.000009] sched_clock: 32 bits at 6MHz, resolution 160ns, wraps every 343597383600ns
[    0.000027] Switching to timer-based delay loop, resolution 160ns
[    0.000294] Calibrating delay loop (skipped), value calculated using timer frequency.. 12.50 BogoMIPS (lpj=62500)
[    0.000326] pid_max: default: 32768 minimum: 301
[    0.000526] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.000551] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.001693] CPU: Testing write buffer coherency: ok
[    0.001980] qcom_scm: convention: smc legacy
[    0.002946] Setting up static identity map for 0x42300000 - 0x42300060
[    0.003121] rcu: Hierarchical SRCU implementation.
[    0.003430] dyndbg: Ignore empty _ddebug table in a CONFIG_DYNAMIC_DEBUG_CORE build
[    0.003672] smp: Bringing up secondary CPUs ...
[    0.005626] smp: Brought up 1 node, 2 CPUs
[    0.005649] SMP: Total of 2 processors activated (25.00 BogoMIPS).
[    0.005665] CPU: All CPU(s) started in SVC mode.
[    0.017469] VFP support v0.3: implementor 51 architecture 64 part 4d variant 2 rev 0
[    0.017649] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.017683] futex hash table entries: 512 (order: 3, 32768 bytes, linear)
[    0.017840] pinctrl core: initialized pinctrl subsystem
[    0.019144] NET: Registered protocol family 16
[    0.019477] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.021038] thermal_sys: Registered thermal governor 'step_wise'
[    0.023127] cpuidle: using governor ladder
[    0.023202] cpuidle: using governor menu
[    0.074044] usbcore: registered new interface driver usbfs
[    0.074142] usbcore: registered new interface driver hub
[    0.074217] usbcore: registered new device driver usb
[    0.074295] pps_core: LinuxPPS API ver. 1 registered
[    0.074312] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    0.074349] PTP clock support registered
[    0.076580] clocksource: Switched to clocksource dg_timer
[    0.177345] NET: Registered protocol family 2
[    0.177537] IP idents hash table entries: 8192 (order: 4, 65536 bytes, linear)
[    0.178635] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[    0.178691] TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear)
[    0.178808] TCP bind hash table entries: 4096 (order: 3, 32768 bytes, linear)
[    0.178867] TCP: Hash tables configured (established 4096 bind 4096)
[    0.178979] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[    0.179017] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[    0.179247] NET: Registered protocol family 1
[    0.179304] PCI: CLS 0 bytes, default 64
[    0.180793] workingset: timestamp_bits=14 max_order=17 bucket_order=3
[    0.186990] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.187011] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[    0.294663] qcom-pcie 1b500000.pci: supply vdda not found, using dummy regulator
[    0.294942] qcom-pcie 1b500000.pci: supply vdda_phy not found, using dummy regulator
[    0.295063] qcom-pcie 1b500000.pci: supply vdda_refclk not found, using dummy regulator
[    0.295340] qcom-pcie 1b500000.pci: host bridge /soc/pci@1b500000 ranges:
[    0.295377] qcom-pcie 1b500000.pci: Parsing ranges property...
[    0.295429] qcom-pcie 1b500000.pci:       IO 0x000fe00000..0x000fe0ffff -> 0x000fe00000
[    0.295473] qcom-pcie 1b500000.pci:      MEM 0x0008000000..0x000fdfffff -> 0x0008000000
[    0.522493] qcom-pcie 1b500000.pci: Link up
[    0.522668] qcom-pcie 1b500000.pci: PCI host bridge to bus 0000:00
[    0.522696] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.522721] pci_bus 0000:00: root bus resource [io  0x0000-0xffff] (bus address [0xfe00000-0xfe0ffff])
[    0.522740] pci_bus 0000:00: root bus resource [mem 0x08000000-0x0fdfffff]
[    0.522761] pci_bus 0000:00: scanning bus
[    0.522828] pci 0000:00:00.0: [17cb:0101] type 01 class 0x060400
[    0.522989] pci 0000:00:00.0: supports D1
[    0.523009] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[    0.523032] pci 0000:00:00.0: PME# disabled
[    0.528252] pci_bus 0000:00: fixups for bus
[    0.528280] PCI: bus0: Fast back to back transfers disabled
[    0.528304] pci 0000:00:00.0: scanning [bus 01-ff] behind bridge, pass 0
[    0.528469] pci_bus 0000:01: scanning bus
[    0.528812] pci 0000:01:00.0: [168c:0046] type 00 class 0x028000
[    0.529109] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x001fffff 64bit]
[    0.530482] pci 0000:01:00.0: PME# supported from D0 D3hot D3cold
[    0.530537] pci 0000:01:00.0: PME# disabled
[    0.535833] pci_bus 0000:01: fixups for bus
[    0.535921] PCI: bus1: Fast back to back transfers disabled
[    0.535942] pci_bus 0000:01: bus scan returning with max=01
[    0.535965] pci 0000:00:00.0: scanning [bus 01-ff] behind bridge, pass 1
[    0.535987] pci_bus 0000:00: bus scan returning with max=ff
[    0.536026] pci 0000:00:00.0: BAR 8: assigned [mem 0x08000000-0x081fffff]
[    0.536056] pci 0000:01:00.0: BAR 0: assigned [mem 0x08000000-0x081fffff 64bit]
[    0.536211] pci 0000:00:00.0: PCI bridge to [bus 01-ff]
[    0.536240] pci 0000:00:00.0:   bridge window [mem 0x08000000-0x081fffff]
[    0.536469] pcieport 0000:00:00.0: assign IRQ: got 47
[    0.537253] pcieport 0000:00:00.0: AER: enabled with IRQ 48
[    0.537383] pcieport 0000:00:00.0: saving config space at offset 0x0 (reading 0x10117cb)
[    0.537400] pcieport 0000:00:00.0: saving config space at offset 0x4 (reading 0x100547)
[    0.537414] pcieport 0000:00:00.0: saving config space at offset 0x8 (reading 0xff000000)
[    0.537428] pcieport 0000:00:00.0: saving config space at offset 0xc (reading 0x10010)
[    0.537441] pcieport 0000:00:00.0: saving config space at offset 0x10 (reading 0x0)
[    0.537455] pcieport 0000:00:00.0: saving config space at offset 0x14 (reading 0x0)
[    0.537469] pcieport 0000:00:00.0: saving config space at offset 0x18 (reading 0xff0100)
[    0.537482] pcieport 0000:00:00.0: saving config space at offset 0x1c (reading 0xf0)
[    0.537496] pcieport 0000:00:00.0: saving config space at offset 0x20 (reading 0x8100800)
[    0.537510] pcieport 0000:00:00.0: saving config space at offset 0x24 (reading 0x1fff1)
[    0.537525] pcieport 0000:00:00.0: saving config space at offset 0x28 (reading 0x0)
[    0.537539] pcieport 0000:00:00.0: saving config space at offset 0x2c (reading 0x0)
[    0.537552] pcieport 0000:00:00.0: saving config space at offset 0x30 (reading 0x0)
[    0.537566] pcieport 0000:00:00.0: saving config space at offset 0x34 (reading 0x40)
[    0.537580] pcieport 0000:00:00.0: saving config space at offset 0x38 (reading 0x0)
[    0.537593] pcieport 0000:00:00.0: saving config space at offset 0x3c (reading 0x3012f)
[    0.538353] qcom-pcie 1b700000.pci: supply vdda not found, using dummy regulator
[    0.538618] qcom-pcie 1b700000.pci: supply vdda_phy not found, using dummy regulator
[    0.538762] qcom-pcie 1b700000.pci: supply vdda_refclk not found, using dummy regulator
[    0.539036] qcom-pcie 1b700000.pci: host bridge /soc/pci@1b700000 ranges:
[    0.539068] qcom-pcie 1b700000.pci: Parsing ranges property...
[    0.539119] qcom-pcie 1b700000.pci:       IO 0x0031e00000..0x0031e0ffff -> 0x0031e00000
[    0.539161] qcom-pcie 1b700000.pci:      MEM 0x002e000000..0x0031dfffff -> 0x002e000000
[    0.763915] qcom-pcie 1b700000.pci: Link up
[    0.764084] qcom-pcie 1b700000.pci: PCI host bridge to bus 0001:00
[    0.764110] pci_bus 0001:00: root bus resource [bus 00-ff]
[    0.764134] pci_bus 0001:00: root bus resource [io  0x10000-0x1ffff] (bus address [0x31e00000-0x31e0ffff])
[    0.764155] pci_bus 0001:00: root bus resource [mem 0x2e000000-0x31dfffff]
[    0.764174] pci_bus 0001:00: scanning bus
[    0.764240] pci 0001:00:00.0: [17cb:0101] type 01 class 0x060400
[    0.764381] pci 0001:00:00.0: supports D1
[    0.764399] pci 0001:00:00.0: PME# supported from D0 D1 D3hot
[    0.764421] pci 0001:00:00.0: PME# disabled
[    0.769336] pci_bus 0001:00: fixups for bus
[    0.769363] PCI: bus0: Fast back to back transfers disabled
[    0.769385] pci 0001:00:00.0: scanning [bus 01-ff] behind bridge, pass 0
[    0.769558] pci_bus 0001:01: scanning bus
[    0.769925] pci 0001:01:00.0: [168c:0046] type 00 class 0x028000
[    0.770239] pci 0001:01:00.0: reg 0x10: [mem 0x00000000-0x001fffff 64bit]
[    0.771715] pci 0001:01:00.0: PME# supported from D0 D3hot D3cold
[    0.771773] pci 0001:01:00.0: PME# disabled
[    0.772173] pci 0001:01:00.0: 2.000 Gb/s available PCIe bandwidth, limited by 2.5 GT/s PCIe x1 link at 0001:00:00.0 (capable of 4.000 Gb/s with 5.0 GT/s PCIe x1 link)
[    0.777058] pci_bus 0001:01: fixups for bus
[    0.777153] PCI: bus1: Fast back to back transfers disabled
[    0.777172] pci_bus 0001:01: bus scan returning with max=01
[    0.777193] pci 0001:00:00.0: scanning [bus 01-ff] behind bridge, pass 1
[    0.777214] pci_bus 0001:00: bus scan returning with max=ff
[    0.777246] pci 0001:00:00.0: BAR 8: assigned [mem 0x2e000000-0x2e1fffff]
[    0.777274] pci 0001:01:00.0: BAR 0: assigned [mem 0x2e000000-0x2e1fffff 64bit]
[    0.777432] pci 0001:00:00.0: PCI bridge to [bus 01-ff]
[    0.777456] pci 0001:00:00.0:   bridge window [mem 0x2e000000-0x2e1fffff]
[    0.777684] pcieport 0001:00:00.0: assign IRQ: got 49
[    0.778381] pcieport 0001:00:00.0: AER: enabled with IRQ 50
[    0.778496] pcieport 0001:00:00.0: saving config space at offset 0x0 (reading 0x10117cb)
[    0.778512] pcieport 0001:00:00.0: saving config space at offset 0x4 (reading 0x100547)
[    0.778528] pcieport 0001:00:00.0: saving config space at offset 0x8 (reading 0xff000000)
[    0.778541] pcieport 0001:00:00.0: saving config space at offset 0xc (reading 0x10010)
[    0.778555] pcieport 0001:00:00.0: saving config space at offset 0x10 (reading 0x0)
[    0.778570] pcieport 0001:00:00.0: saving config space at offset 0x14 (reading 0x0)
[    0.778583] pcieport 0001:00:00.0: saving config space at offset 0x18 (reading 0xff0100)
[    0.778597] pcieport 0001:00:00.0: saving config space at offset 0x1c (reading 0xf0)
[    0.778611] pcieport 0001:00:00.0: saving config space at offset 0x20 (reading 0x2e102e00)
[    0.778624] pcieport 0001:00:00.0: saving config space at offset 0x24 (reading 0x1fff1)
[    0.778638] pcieport 0001:00:00.0: saving config space at offset 0x28 (reading 0x0)
[    0.778651] pcieport 0001:00:00.0: saving config space at offset 0x2c (reading 0x0)
[    0.778664] pcieport 0001:00:00.0: saving config space at offset 0x30 (reading 0x0)
[    0.778678] pcieport 0001:00:00.0: saving config space at offset 0x34 (reading 0x40)
[    0.778691] pcieport 0001:00:00.0: saving config space at offset 0x38 (reading 0x0)
[    0.778704] pcieport 0001:00:00.0: saving config space at offset 0x3c (reading 0x30131)
[    0.781752] L2 @ QSB rate. Forcing new rate.
[    0.781988] L2 @ 384000 KHz
[    0.782188] CPU0 @ 800000 KHz
[    0.782205] CPU1 @ QSB rate. Forcing new rate.
[    0.782340] CPU1 @ 384000 KHz
[    0.786788] gsbi 16300000.gsbi: GSBI port protocol: 6 crci: 0
[    0.789684] Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
[    0.790576] msm_serial 16340000.serial: msm_serial: detected port #0
[    0.790633] msm_serial 16340000.serial: uartclk = 7372800
[    0.790714] 16340000.serial: ttyMSM0 at MMIO 0x16340000 (irq = 51, base_baud = 460800) is a MSM
[    0.790761] msm_serial: console setup on port #0
[    1.625450] printk: console [ttyMSM0] enabled
[    1.630701] msm_serial: driver initialized
[    1.640159] loop: module loaded
[    1.641894] nand: device found, Manufacturer ID: 0x01, Chip ID: 0xa1
[    1.642118] nand: AMD/Spansion S34MS01G2
[    1.648829] nand: 128 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
[    1.652736] 8 fixed-partitions partitions found on MTD device qcom_nand.0
[    1.660092] Creating 8 MTD partitions on "qcom_nand.0":
[    1.666957] 0x000000000000-0x000000c80000 : "qcadata"
[    1.677284] random: fast init done
[    1.693575] 0x000000c80000-0x000001180000 : "APPSBL"
[    1.702565] 0x000001180000-0x000001200000 : "APPSBLENV"
[    1.703924] 0x000001200000-0x000001340000 : "art"
[    1.709377] 0x000001340000-0x000001480000 : "artbak"
[    1.714049] 0x000001480000-0x000001880000 : "kernel"
[    1.723819] 0x000001880000-0x000007900000 : "ubi"
[    1.885589] 0x000007900000-0x000008000000 : "reserve"
[    1.928612] switch0: Atheros AR8337 rev. 2 switch registered on 37000000.mdio-mii
[    2.710803] ar8327: qca,phy-rgmii-en is not specified
[    2.712382] i2c /dev entries driver
[    2.722289] sdhci: Secure Digital Host Controller Interface driver
[    2.722340] sdhci: Copyright(c) Pierre Ossman
[    2.727522] sdhci-pltfm: SDHCI platform and OF driver helper
[    2.735698] NET: Registered protocol family 10
[    2.740163] Segment Routing with IPv6
[    2.741936] NET: Registered protocol family 17
[    2.745717] Bridge firewalling registered
[    2.750315] 8021q: 802.1Q VLAN Support v1.8
[    2.754012] Registering SWP/SWPB emulation handler
[    2.797030] qcom_rpm 108000.rpm: RPM firmware 3.0.16777364
[    2.817015] s1a: Bringing 0uV into 1050000-1050000uV
[    2.817463] s1a: supplied by regulator-dummy
[    2.821276] s1b: Bringing 0uV into 1050000-1050000uV
[    2.825647] s1b: supplied by regulator-dummy
[    2.830569] s2a: Bringing 0uV into 775000-775000uV
[    2.834857] s2a: supplied by regulator-dummy
[    2.839405] s2b: Bringing 0uV into 775000-775000uV
[    2.843883] s2b: supplied by regulator-dummy
[    2.856939] thermal thermal_zone0: failed to read out thermal zone (-110)
[    2.896949] UBI: auto-attach mtd6
[    2.896972] ubi0: attaching mtd6
[    2.975780] random: crng init done
[    3.704732] ubi0: scanning is finished
[    3.715494] ubi0: attached mtd6 (name "ubi", size 96 MiB)
[    3.715518] ubi0: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
[    3.719927] ubi0: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
[    3.726636] ubi0: VID header offset: 2048 (aligned 2048), data offset: 4096
[    3.733551] ubi0: good PEBs: 772, bad PEBs: 0, corrupted PEBs: 0
[    3.740323] ubi0: user volume: 2, internal volumes: 1, max. volumes count: 128
[    3.746520] ubi0: max/mean erase counter: 32/22, WL threshold: 4096, image sequence number: 1616834783
[    3.753639] ubi0: available PEBs: 0, total reserved PEBs: 772, PEBs reserved for bad PEB handling: 20
[    3.797146] ubi0: background thread "ubi_bgt0d" started, PID 81
[    3.797580] block ubiblock0_0: created from ubi0:0(rootfs)
[    3.801873] ubiblock: device ubiblock0_0 (rootfs) set to be root filesystem
[    3.817841] VFS: Mounted root (squashfs filesystem) readonly on device 254:0.
[    3.818750] Freeing unused kernel memory: 1024K
[    3.847504] Run /sbin/init as init process
[    3.847525]   with arguments:
[    3.847533]     /sbin/init
[    3.847540]   with environment:
[    3.847547]     HOME=/
[    3.847552]     TERM=linux
[    4.416802] init: Console is alive
[    4.417071] init: - watchdog -
[    5.269894] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[    5.349365] genirq: irq_chip msmgpio did not update eff. affinity mask of irq 52
[    5.352318] pstore: Using crash dump compression: deflate
[    5.355823] pstore: Registered ramoops as persistent store backend
[    5.361204] ramoops: using 0x40000@0x42100000, ecc: 0
[    5.368487] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    5.375638] SCSI subsystem initialized
[    5.383008] libata version 3.00 loaded.
[    5.384988] ahci 29000000.sata: supply ahci not found, using dummy regulator
[    5.385128] ahci 29000000.sata: supply phy not found, using dummy regulator
[    5.391303] ahci 29000000.sata: supply target not found, using dummy regulator
[    5.406117] ahci 29000000.sata: forcing port_map 0x0 -> 0x1
[    5.406161] ahci 29000000.sata: AHCI 0001.0300 32 slots 1 ports 6 Gbps 0x1 impl platform mode
[    5.410618] ahci 29000000.sata: flags: ncq sntf pm led clo only pmp pio slum part ccc apst
[    5.420001] scsi host0: ahci
[    5.427621] ata1: SATA max UDMA/133 mmio [mem 0x29000000-0x2900017f] port 0x100 irq 34
[    5.759217] ata1: SATA link down (SStatus 0 SControl 300)
[    5.766010] ehci-fsl: Freescale EHCI Host controller driver
[    5.768320] ehci-platform: EHCI generic platform driver
[    5.783053] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    5.783681] ohci-platform: OHCI generic platform driver
[    5.790590] dwc3-qcom 110f8800.usb3: IRQ hs_phy_irq not found
[    5.793246] dwc3-qcom 110f8800.usb3: IRQ dp_hs_phy_irq not found
[    5.799265] dwc3-qcom 110f8800.usb3: IRQ dm_hs_phy_irq not found
[    5.805289] dwc3-qcom 110f8800.usb3: IRQ ss_phy_irq not found
[    5.818099] dwc3-qcom 100f8800.usb3: IRQ hs_phy_irq not found
[    5.818148] dwc3-qcom 100f8800.usb3: IRQ dp_hs_phy_irq not found
[    5.822922] dwc3-qcom 100f8800.usb3: IRQ dm_hs_phy_irq not found
[    5.829036] dwc3-qcom 100f8800.usb3: IRQ ss_phy_irq not found
[    5.983468] xhci-hcd xhci-hcd.0.auto: xHCI Host Controller
[    5.983528] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 1
[    5.988116] xhci-hcd xhci-hcd.0.auto: hcc params 0x0228f065 hci version 0x100 quirks 0x0000000002010010
[    5.995462] xhci-hcd xhci-hcd.0.auto: irq 55, io mem 0x11000000
[    6.005810] hub 1-0:1.0: USB hub found
[    6.010816] hub 1-0:1.0: 1 port detected
[    6.014828] xhci-hcd xhci-hcd.0.auto: xHCI Host Controller
[    6.018693] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 2
[    6.023884] xhci-hcd xhci-hcd.0.auto: Host supports USB 3.0 SuperSpeed
[    6.042410] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[    6.043472] hub 2-0:1.0: USB hub found
[    6.049756] hub 2-0:1.0: 1 port detected
[    6.054077] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
[    6.057360] xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 3
[    6.062776] xhci-hcd xhci-hcd.1.auto: hcc params 0x0228f065 hci version 0x100 quirks 0x0000000002010010
[    6.070294] xhci-hcd xhci-hcd.1.auto: irq 56, io mem 0x10000000
[    6.081404] hub 3-0:1.0: USB hub found
[    6.085503] hub 3-0:1.0: 1 port detected
[    6.089987] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller
[    6.093274] xhci-hcd xhci-hcd.1.auto: new USB bus registered, assigned bus number 4
[    6.098676] xhci-hcd xhci-hcd.1.auto: Host supports USB 3.0 SuperSpeed
[    6.106362] usb usb4: We don't know the algorithms for LPM for this host, disabling LPM.
[    6.114085] hub 4-0:1.0: USB hub found
[    6.121276] hub 4-0:1.0: 1 port detected
[    6.128580] usbcore: registered new interface driver usb-storage
[    6.128756] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[    6.143876] init: - preinit -
[    7.767540] usb 3-1: new high-speed USB device number 2 using xhci-hcd
[    7.964030] usb-storage 3-1:1.0: USB Mass Storage device detected
[    7.996229] scsi host1: usb-storage 3-1:1.0
[    9.046018] scsi 1:0:0:0: Direct-Access     USB      Flash Disk       8.07 PQ: 0 ANSI: 4
[    9.049117] sd 1:0:0:0: [sda] 7798784 512-byte logical blocks: (3.99 GB/3.72 GiB)
[    9.054285] sd 1:0:0:0: [sda] Write Protect is off
[    9.060638] sd 1:0:0:0: [sda] Mode Sense: 23 00 00 00
[    9.061570] sd 1:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[    9.070702]  sda: sda1
[    9.077138] sd 1:0:0:0: [sda] Attached SCSI removable disk
[   12.507619] mount_root: loading kmods from internal overlay
[   12.525344] kmodloader: loading kernel modules from //etc/modules-boot.d/*
[   12.527291] kmodloader: done loading kernel modules from //etc/modules-boot.d/*
[   13.305237] UBIFS (ubi0:1): Mounting in unauthenticated mode
[   13.307098] UBIFS (ubi0:1): background thread "ubifs_bgt0_1" started, PID 169
[   13.371260] UBIFS (ubi0:1): recovery needed
[   13.512229] UBIFS (ubi0:1): recovery completed
[   13.512337] UBIFS (ubi0:1): UBIFS: mounted UBI device 0, volume 1, name "rootfs_data"
[   13.515565] UBIFS (ubi0:1): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[   13.523541] UBIFS (ubi0:1): FS size: 83423232 bytes (79 MiB, 657 LEBs), journal size 4190208 bytes (3 MiB, 33 LEBs)
[   13.533416] UBIFS (ubi0:1): reserved for root: 3940284 bytes (3847 KiB)
[   13.543662] UBIFS (ubi0:1): media format: w5/r0 (latest is w5/r0), UUID 9E9FA805-76E1-442E-A067-A942343D42D1, small LPT model
[   13.557072] block: attempting to load /tmp/ubifs_cfg/upper/etc/config/fstab
[   13.647961] block: extroot: not configured
[   13.648307] UBIFS (ubi0:1): un-mount UBI device 0
[   13.650993] UBIFS (ubi0:1): background thread "ubifs_bgt0_1" stops
[   13.658850] UBIFS (ubi0:1): Mounting in unauthenticated mode
[   13.661922] UBIFS (ubi0:1): background thread "ubifs_bgt0_1" started, PID 170
[   13.790349] UBIFS (ubi0:1): UBIFS: mounted UBI device 0, volume 1, name "rootfs_data"
[   13.790380] UBIFS (ubi0:1): LEB size: 126976 bytes (124 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes
[   13.797232] UBIFS (ubi0:1): FS size: 83423232 bytes (79 MiB, 657 LEBs), journal size 4190208 bytes (3 MiB, 33 LEBs)
[   13.807140] UBIFS (ubi0:1): reserved for root: 3940284 bytes (3847 KiB)
[   13.817350] UBIFS (ubi0:1): media format: w5/r0 (latest is w5/r0), UUID 9E9FA805-76E1-442E-A067-A942343D42D1, small LPT model
[   14.461374] block: attempting to load /tmp/ubifs_cfg/upper/etc/config/fstab
[   14.468913] block: extroot: not configured
[   14.471701] mount_root: switching to ubifs overlay
[   14.491897] urandom-seed: Seeding with /etc/urandom.seed
[   14.558024] procd: - early -
[   14.558188] procd: - watchdog -
[   15.147105] procd: - watchdog -
[   15.150691] procd: - ubus -
[   15.228308] procd: - init -
[   16.054209] urngd: v1.0.2 started.
[   16.146456] kmodloader: loading kernel modules from /etc/modules.d/*
[   16.213597] NET: Registered protocol family 15
[   16.215296] Initializing XFRM netlink socket
[   16.218795] **********************************************************
[   16.221368] * Driver    :NSS GMAC Driver - RTL v(3.72a)
[   16.227785] * Version   :1.0
[   16.232858] * Copyright :Copyright (c) 2013-2018 The Linux Foundation. All rights reserved.
[   16.235956] **********************************************************
[   16.440535] nss_driver - fw of size 536324  bytes copied to load addr: 40000000, nss_id : 0
[   16.441413] nss_driver - Turbo Support 1
[   16.447797] Supported Frequencies -
[   16.447801] 800Mhz
[   16.451862] 800Mhz
[   16.455424] 800Mhz
[   16.457325]
[   16.461764] f373e52d: meminfo init succeed
[   16.498524] node size 1 # items 2
[   16.498562] memory: 0 0 (avl 490147840) items 2 active_cores 2
[   16.500842] f373e52d: nss core 0 booted successfully
[   16.545221] nss_driver - fw of size 218224  bytes copied to load addr: 40800000, nss_id : 1
[   16.545750] 5f157862: meminfo init succeed
[   16.552568] debugfs: File 'n2h' in directory 'stats' already present!
[   16.556618] debugfs: File 'qrfs' in directory 'stats' already present!
[   16.563408] debugfs: File 'c2c_tx' in directory 'stats' already present!
[   16.569618] debugfs: File 'c2c_rx' in directory 'stats' already present!
[   16.576421] debugfs: File 'unaligned' in directory 'stats' already present!
[   16.585840] node size 1 # items 2
[   16.589796] memory: 0 0 (avl 490147840) items 2 active_cores 2
[   16.593194] 5f157862: nss core 1 booted successfully
[   16.656393] Loading modules backported from Linux version v5.15.8-0-g43e577d7a2cb
[   16.656436] Backport generated by backports.git v5.15.8-1-0-g83f664bb
[   16.684967] usbcore: registered new interface driver usbserial_generic
[   16.685039] usbserial: USB Serial support registered for generic
[   16.717416] xt_time: kernel timezone is -0000
[   16.798739] PPP generic driver version 2.4.2
[   16.799902] NET: Registered protocol family 24
[   16.818693] ath10k_pci 0000:01:00.0: assign IRQ: got 47
[   16.819280] ath10k_pci 0000:01:00.0: enabling device (0140 -> 0142)
[   16.819398] ath10k_pci 0000:01:00.0: enabling bus mastering
[   16.820037] ath10k_pci 0000:01:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[   26.533011] EXT4-fs (sda1): recovery complete
[   26.534889] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts:
[   30.656750] ath10k_pci 0000:01:00.0: qca9984/qca9994 hw1.0 target 0x01000000 chip_id 0x00000000 sub 168c:cafe
[   30.656821] ath10k_pci 0000:01:00.0: kconfig debug 1 debugfs 1 tracing 1 dfs 1 testmode 0
[   30.672016] ath10k_pci 0000:01:00.0: firmware ver 10.4-3.9.0.2-00131 api 5 features no-p2p,mfp,peer-flow-ctrl,btcoex-param,allows-mesh-bcast,no-ps,peer-fixed-rate,iram-recovery crc32 23bd9e43
[   33.235256] ath10k_pci 0000:01:00.0: board_file api 2 bmi_id 0:1 crc32 85498734
[   37.138855] ath10k_pci 0000:01:00.0: htt-ver 2.2 wmi-op 6 htt-op 4 cal pre-cal-nvmem max-sta 512 raw 0 hwcrypto 1
[   37.229788] ath: EEPROM regdomain sanitized
[   37.229809] ath: EEPROM regdomain: 0x64
[   37.229824] ath: EEPROM indicates we should expect a direct regpair map
[   37.229850] ath: Country alpha2 being used: 00
[   37.229864] ath: Regpair used: 0x64
[   37.234468] ath10k_pci 0001:01:00.0: assign IRQ: got 49
[   37.235089] ath10k_pci 0001:01:00.0: enabling device (0140 -> 0142)
[   37.235202] ath10k_pci 0001:01:00.0: enabling bus mastering
[   37.235947] ath10k_pci 0001:01:00.0: pci irq msi oper_irq_mode 2 irq_mode 0 reset_mode 0
[   38.040131] ath10k_pci 0001:01:00.0: qca9984/qca9994 hw1.0 target 0x01000000 chip_id 0x00000000 sub 168c:cafe
[   38.040173] ath10k_pci 0001:01:00.0: kconfig debug 1 debugfs 1 tracing 1 dfs 1 testmode 0
[   38.051468] ath10k_pci 0001:01:00.0: firmware ver 10.4-3.9.0.2-00131 api 5 features no-p2p,mfp,peer-flow-ctrl,btcoex-param,allows-mesh-bcast,no-ps,peer-fixed-rate,iram-recovery crc32 23bd9e43
[   40.327703] ath10k_pci 0001:01:00.0: board_file api 2 bmi_id 0:2 crc32 85498734
[   44.116859] ath10k_pci 0001:01:00.0: htt-ver 2.2 wmi-op 6 htt-op 4 cal pre-cal-nvmem max-sta 512 raw 0 hwcrypto 1
[   44.210127] ath: EEPROM regdomain sanitized
[   44.210153] ath: EEPROM regdomain: 0x64
[   44.210170] ath: EEPROM indicates we should expect a direct regpair map
[   44.210200] ath: Country alpha2 being used: 00
[   44.210215] ath: Regpair used: 0x64
[   44.221670] kmodloader: done loading kernel modules from /etc/modules.d/*
[   47.353482] ECM init
[   47.353534] ECM database jhash random seed: 0x2301a354
[   47.355853] ECM init complete
[   49.428973] ipq8064-mdio 37000000.mdio eth1: 1000 Mbps Full Duplex
[   50.479563] br-lan: port 1(eth1.1) entered blocking state
[   50.479590] br-lan: port 1(eth1.1) entered disabled state
[   50.484241] device eth1.1 entered promiscuous mode
[   50.489420] device eth1 entered promiscuous mode
[   50.494665] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
[   50.502089] br-lan: port 1(eth1.1) entered blocking state
[   50.504790] br-lan: port 1(eth1.1) entered forwarding state
[   50.523996] ipq8064-mdio 37000000.mdio eth0: 1000 Mbps Full Duplex
[   51.602015] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready
[   51.602205] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   52.380537] ath: EEPROM regdomain: 0x82be
[   52.380560] ath: EEPROM indicates we should expect a country code
[   52.383552] ath: doing EEPROM country->regdmn map search
[   52.389704] ath: country maps to regdmn code: 0x3b
[   52.394993] ath: Country alpha2 being used: SG
[   52.399655] ath: Regpair used: 0x3b
[   52.404018] ath: regdomain 0x82be dynamically updated by user
[   52.407489] ath: EEPROM regdomain: 0x82be
[   52.413294] ath: EEPROM indicates we should expect a country code
[   52.417368] ath: doing EEPROM country->regdmn map search
[   52.423365] ath: country maps to regdmn code: 0x3b
[   52.428865] ath: Country alpha2 being used: SG
[   52.433351] ath: Regpair used: 0x3b
[   52.437913] ath: regdomain 0x82be dynamically updated by user
[   59.797579] ath10k_pci 0000:01:00.0: Unknown eventid: 36933
[   59.800350] wlan0: Created a NSS virtual interface
[   59.805322] br-lan: port 2(wlan0) entered blocking state
[   59.806831] br-lan: port 2(wlan0) entered disabled state
[   59.812741] device wlan0 entered promiscuous mode
[   59.817820] br-lan: port 2(wlan0) entered blocking state
[   59.822199] br-lan: port 2(wlan0) entered forwarding state
root@R7800:~#
ubus call system board
root@R7800:~# ubus call system board
{
        "kernel": "5.10.100",
        "hostname": "R7800",
        "system": "ARMv7 Processor rev 0 (v7l)",
        "model": "Netgear Nighthawk X4S R7800",
        "board_name": "netgear,r7800",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "SNAPSHOT",
                "revision": "r18974+22-8144f9c665",
                "target": "ipq806x/generic",
                "description": "OpenWrt SNAPSHOT r18974+22-8144f9c665"
        }
}
root@R7800:~#

Those kernel errors regarding DMA are strange.
kernel [479974.691302] adm-dma-engine 18300000.dma: dma_sync_wait: timeout!

Sounds similar as the fried R7800 in

Yup, I saw those same logs but my box is still booting ok.