Hi,
I have the issue that the wifi is not working on the first (automatic) reboot after a firmware upgrade on my FritzBox 7330. I have to manually restart wlan0 from the web interface or do another reboot (on all adjacent reboots the wifi starts without manual intervention).
I compared the two kernel logs (auto reboot after upgrade and a manual reboot) and the only real difference I've found is:
[ 65.973024] owl-loader 0000:00:0e.0: Direct firmware load for ath9k-eeprom-pci-0000:00:0e.0.bin failed with error -2
[ 65.982121] owl-loader 0000:00:0e.0: Falling back to user helper
Does someone has an idea how to fix this? It's not the first time I encounter this issue and it would be great if I could upgrade the firmware without crouching into a small corner afterwards to connect my Laptop via cable to get the wifi working 
Full kernel log:
[ 0.000000] Linux version 4.9.184 (sven@archdesk) (gcc version 7.3.0 (OpenWrt GCC 7.3.0 r7808-ef686b7292) ) #0 Thu Jun 27 12:18:52 2019
[ 0.000000] SoC: AR9 rev 1.2
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 0001954c (MIPS 34Kc)
[ 0.000000] MIPS: machine is 1&1 HomeServer
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 04000000 @ 00000000 (usable)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 16kB, 4-way, VIPT, no aliases, linesize 32 bytes
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x0000000003ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x0000000003ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000003ffffff]
[ 0.000000] On node 0 totalpages: 16384
[ 0.000000] free_area_init_node: node 0, pgdat 804d1844, node_mem_map 810062c0
[ 0.000000] Normal zone: 128 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 16384 pages, LIFO batch:3
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256
[ 0.000000] Kernel command line: console=ttyLTQ0,115200
[ 0.000000] PID hash table entries: 256 (order: -2, 1024 bytes)
[ 0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Writing ErrCtl register=000332c0
[ 0.000000] Readback ErrCtl register=000332c0
[ 0.000000] Memory: 58532K/65536K available (3844K kernel code, 163K rwdata, 920K rodata, 1200K init, 209K bss, 7004K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS:256
[ 0.000000] CPU Clock: 393MHz
[ 0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 9721189849 ns
[ 0.000014] sched_clock: 32 bits at 196MHz, resolution 5ns, wraps every 10922685437ns
[ 0.007948] Calibrating delay loop... 260.86 BogoMIPS (lpj=521728)
[ 0.042435] pid_max: default: 32768 minimum: 301
[ 0.047303] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.053835] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.067537] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.077197] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.083409] pinctrl core: initialized pinctrl subsystem
[ 0.089427] NET: Registered protocol family 16
[ 0.098637] pinctrl-xway 1e100b10.pinmux: Init done
[ 0.104685] dma-xway 1e104100.dma: Init done - hw rev: 6, ports: 5, channels: 20
[ 0.171164] PCI host bridge /fpi@10000000/pci@E105400 ranges:
[ 0.176836] MEM 0x0000000018000000..0x0000000019ffffff
[ 0.182081] IO 0x000000001ae00000..0x000000001affffff
[ 0.218576] usbcore: registered new interface driver usbfs
[ 0.224106] usbcore: registered new interface driver hub
[ 0.229453] usbcore: registered new device driver usb
[ 0.234800] PCI host bridge to bus 0000:00
[ 0.238816] pci_bus 0000:00: root bus resource [mem 0x18000000-0x19ffffff]
[ 0.245723] pci_bus 0000:00: root bus resource [io 0x1ae00000-0x1affffff]
[ 0.252666] pci_bus 0000:00: root bus resource [??? 0x00000000 flags 0x0]
[ 0.259523] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
[ 0.267585] pci 0000:00:0e.0: [168c:ff1d] type 00 class 0x020000
[ 0.267633] pci 0000:00:0e.0: reg 0x10: [mem 0x00000000-0x0000ffff]
[ 0.268112] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
[ 0.268159] pci 0000:00:0e.0: BAR 0: assigned [mem 0x18000000-0x1800ffff]
[ 0.275929] clocksource: Switched to clocksource MIPS
[ 0.282513] NET: Registered protocol family 2
[ 0.288041] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.294935] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.301330] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.307971] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.313702] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.320341] NET: Registered protocol family 1
[ 0.324697] PCI: CLS 0 bytes, default 32
[ 0.332926] gptu: totally 6 16-bit timers/counters
[ 0.337806] gptu: misc_register on minor 63
[ 0.341900] gptu: succeeded to request irq 126
[ 0.346382] gptu: succeeded to request irq 127
[ 0.350895] gptu: succeeded to request irq 128
[ 0.355409] gptu: succeeded to request irq 129
[ 0.359932] gptu: succeeded to request irq 130
[ 0.364437] gptu: succeeded to request irq 131
[ 0.369995] Crashlog allocated RAM at address 0x3f00000
[ 0.377602] workingset: timestamp_bits=30 max_order=14 bucket_order=0
[ 0.395542] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.401282] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 0.428908] io scheduler noop registered
[ 0.432737] io scheduler deadline registered (default)
[ 0.438629] 1e100c00.serial: ttyLTQ0 at MMIO 0x1e100c00 (irq = 112, base_baud = 0) is a lantiq,asc
[ 0.447557] console [ttyLTQ0] enabled
[ 0.454803] bootconsole [early0] disabled
[ 0.463812] lantiq nor flash device: 01000000 at 10000000
[ 0.467977] ltq_nor: Found 1 x16 devices at 0x0 in 16-bit bank. Manufacturer ID 0x0000c2 Chip ID 0x00227e
[ 0.477258] Amd/Fujitsu Extended Query Table at 0x0040
[ 0.482354] Amd/Fujitsu Extended Query version 1.3.
[ 0.487343] number of CFI chips: 1
[ 0.490757] 4 fixed-partitions partitions found on MTD device ltq_nor
[ 0.497094] Creating 4 MTD partitions on "ltq_nor":
[ 0.501925] 0x000000000000-0x000000020000 : "urlader"
[ 0.511313] 0x000000020000-0x000000f80000 : "firmware"
[ 0.537568] 2 eva-fw partitions found on MTD device firmware
[ 0.541794] 0x000000020000-0x0000001aa268 : "kernel"
[ 0.549026] 0x0000001b0100-0x000000f80000 : "rootfs"
[ 0.555293] mtd: device 3 (rootfs) set to be root filesystem
[ 0.559594] 1 squashfs-split partitions found on MTD device rootfs
[ 0.565646] 0x000000440000-0x000000f80000 : "rootfs_data"
[ 0.573851] 0x000000f80000-0x000000fc0000 : "tffs (1)"
[ 0.580443] 0x000000fc0000-0x000001000000 : "tffs (2)"
[ 0.589252] libphy: Fixed MDIO Bus: probed
[ 0.601369] libphy: ltq_mii: probed
[ 0.603667] Generic PHY 1e180000.etop-ffffffff:00: attached PHY driver [Generic PHY] (mii_bus:phy_addr=1e180000.etop-ffffffff:00, irq=-1)
[ 0.617332] wdt 1f8803f0.watchdog: Init done
[ 0.623272] NET: Registered protocol family 10
[ 0.633766] NET: Registered protocol family 17
[ 0.636895] 8021q: 802.1Q VLAN Support v1.8
[ 0.646924] OF: fdt:not creating '/sys/firmware/fdt': CRC check failed
[ 0.657552] VFS: Mounted root (squashfs filesystem) readonly on device 31:3.
[ 0.665308] Freeing unused kernel memory: 1200K
[ 0.668401] This architecture does not have kernel memory protection.
[ 1.120215] random: fast init done
[ 1.831420] init: Console is alive
[ 1.833811] init: - watchdog -
[ 3.269994] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[ 3.530070] dwc2 1e101000.ifxhcd: DWC OTG Controller
[ 3.533703] dwc2 1e101000.ifxhcd: new USB bus registered, assigned bus number 1
[ 3.540917] dwc2 1e101000.ifxhcd: irq 62, io mem 0x00000000
[ 3.548052] hub 1-0:1.0: USB hub found
[ 3.550906] hub 1-0:1.0: 1 port detected
[ 3.556044] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[ 3.572367] init: - preinit -
[ 4.583111] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 4.610924] random: procd: uninitialized urandom read (4 bytes read)
[ 7.648194] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 8.104967] jffs2_scan_eraseblock(): End of filesystem marker found at 0x20000
[ 8.110784] jffs2_build_filesystem(): unlocking the mtd device...
[ 8.116676] done.
[ 8.118537] jffs2_build_filesystem(): erasing all blocks after the end marker...
[ 52.833865] random: crng init done
[ 63.466854] done.
[ 63.467388] jffs2: notice: (359) jffs2_build_xattr_subsystem: complete building xattr subsystem, 0 of xdatum (0 unchecked, 0 orphan) and 0 of xref (0 dead, 0 orphan) found.
[ 63.485064] mount_root: overlay filesystem has not been fully initialized yet
[ 63.498707] mount_root: switching to jffs2 overlay
[ 63.972877] urandom-seed: Seed file not found (/etc/urandom.seed)
[ 64.141735] procd: - early -
[ 64.143360] procd: - watchdog -
[ 64.840871] procd: - watchdog -
[ 64.843142] procd: - ubus -
[ 65.138726] procd: - init -
[ 65.750367] kmodloader: loading kernel modules from /etc/modules.d/*
[ 65.761709] NET: Registered protocol family 8
[ 65.764677] NET: Registered protocol family 20
[ 65.777746] PPP generic driver version 2.4.2
[ 65.790032] ip6_tables: (C) 2000-2006 Netfilter Core Team
[ 65.808373] IFX MEI Version 5.00.00
[ 65.821156] Infineon CPE API Driver version: DSL CPE API V3.24.4.4
[ 65.834484] Loading modules backported from Linux version wt-2017-11-01-0-gfe248fc2c180
[ 65.841069] Backport generated by backports.git v4.14-rc2-1-31-g86cf0e5d
[ 65.851891] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 65.862459] Infineon Technologies DEU driver version 2.0.0
[ 65.869156] IFX DEU DES initialized (multiblock).
[ 65.873830] IFX DEU AES initialized (multiblock).
[ 65.877682] IFX DEU ARC4 initialized (multiblock).
[ 65.882193] IFX DEU SHA1 initialized.
[ 65.885773] IFX DEU MD5 initialized.
[ 65.889353] IFX DEU SHA1_HMAC initialized.
[ 65.893340] IFX DEU MD5_HMAC initialized.
[ 65.905647] nf_conntrack version 0.5.0 (1024 buckets, 4096 max)
[ 65.964655] PCI: Enabling device 0000:00:0e.0 (0000 -> 0002)
[ 65.973024] owl-loader 0000:00:0e.0: Direct firmware load for ath9k-eeprom-pci-0000:00:0e.0.bin failed with error -2
[ 65.982121] owl-loader 0000:00:0e.0: Falling back to user helper
[ 66.101889] NET: Registered protocol family 24
[ 66.128101] xt_time: kernel timezone is -0000
[ 66.276458] kmodloader: done loading kernel modules from /etc/modules.d/*
[ 98.081767] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 101.288284] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 110.019104] owl-loader 0000:00:0e.0: fixup device configuration
[ 110.025703] pci 0000:00:0e.0: [168c:002d] type 00 class 0x028000
[ 110.030358] pci 0000:00:0e.0: reg 0x10: [mem 0x18000000-0x1800ffff]
[ 110.036603] pci 0000:00:0e.0: PME# supported from D0 D3hot
[ 110.042385] pci 0000:00:0e.0: BAR 0: assigned [mem 0x18000000-0x1800ffff]
[ 110.048870] PCI: Enabling device 0000:00:0e.0 (0000 -> 0002)
[ 110.098685] ath: EEPROM regdomain: 0x8114
[ 110.101295] ath: EEPROM indicates we should expect a country code
[ 110.107307] ath: doing EEPROM country->regdmn map search
[ 110.112561] ath: country maps to regdmn code: 0x37
[ 110.117302] ath: Country alpha2 being used: DE
[ 110.121702] ath: Regpair used: 0x37
[ 110.141755] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[ 110.153483] ieee80211 phy0: Atheros AR9287 Rev:2 mem=0xb8000000, irq=30
[ 3739.482778] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 3741.670024] wlan0: authenticate with 54:67:51:56:74:53
[ 3741.696328] wlan0: send auth to 54:67:51:56:74:53 (try 1/3)
[ 3741.716343] wlan0: authenticated
[ 3741.739126] wlan0: associating with AP with corrupt probe response
[ 3741.744054] wlan0: associate with 54:67:51:56:74:53 (try 1/3)
[ 3741.767310] wlan0: RX AssocResp from 54:67:51:56:74:53 (capab=0x1411 status=0 aid=5)
[ 3741.774046] wlan0: associated
[ 3741.776925] wlan0: Limiting TX power to 20 (20 - 0) dBm as advertised by 54:67:51:56:74:53
[ 3741.921127] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready