My tl-wr840v2 got 4 Mb flash. I flashed 16 Mb flash chip and tried replace the current one.
But for some reason, openwrt reboots with kernel panic but same openwrt works just fine in a 4 Mb flash chip.
Original Flash chip : w25q32CSIG
Tried New 16 Mb flash chips : W25Q128FVSG and GD25Q128CSIG. I have flashed new chips with external flash programmer tl866II. Original u-boot do not detect the 16 mb flash chips, so I hv also changed u-boot modified from pepe repository. But still same kernel panic and reboots. I hv tried boot in failsafe mode(f and enter), and flash again with openwrt, also tried with openwrt-sysupgrade file but same kernel panic...and reboots.
This routers wan port do not work(faulty), so I use first lan port as wan and router works just fine with openwrt in 4 Mb flash chip(no kernel panic).
Here is the boot log from serial console,
Booting image from 0x9F020000...
Vendor/image name: OpenWrt r7847-03e5dcbf10
Hardware ID: 0x8400002
Whole image size: 3.8 MB (3932160 bytes)
Kernel size: 1.2 MB (1255420 bytes)
Rootfs size: 2.1 MB (2178738 bytes)
Kernel load address: 0x80060000
Kernel entry point: 0x80060000
Header CRC... skipped
Data CRC... skipped
Stopping network... OK!
Uncompressing Kernel... OK!
Starting kernel...
[ 0.000000] Linux version 4.9.119 (akbar@gfx) (gcc version 7.3.0 (OpenWrt GC8
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 00019374 (MIPS 24Kc)
[ 0.000000] SoC: Qualcomm Atheros QCA9533 ver 2 rev 0
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 02000000 @ 00000000 (usable)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32s
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x0000000001ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x0000000001ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000001ffffff]
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pa8
[ 0.000000] Kernel command line: board=TL-WR840N-v2 console=ttyS0,115200 rd
[ 0.000000] PID hash table entries: 128 (order: -3, 512 bytes)
[ 0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.000000] Writing ErrCtl register=00000000
[ 0.000000] Readback ErrCtl register=00000000
[ 0.000000] Memory: 27924K/32768K available (3105K kernel code, 154K rwdata,)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS:51
[ 0.000000] Clocks: CPU:650.000MHz, DDR:400.000MHz, AHB:200.000MHz, Ref:25.0z
[ 0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_s
[ 0.000010] sched_clock: 32 bits at 325MHz, resolution 3ns, wraps every 6607s
[ 0.008879] Calibrating delay loop... 432.53 BogoMIPS (lpj=2162688)
[ 0.071954] pid_max: default: 32768 minimum: 301
[ 0.077311] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.084828] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.095773] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, ms
[ 0.106997] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.114547] NET: Registered protocol family 16
[ 0.121137] MIPS: machine is TP-LINK TL-WR840N v2
[ 0.601876] Can't analyze schedule() prologue at 80364e78
[ 0.619766] clocksource: Switched to clocksource MIPS
[ 0.626673] NET: Registered protocol family 2
[ 0.632493] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.640478] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.647702] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.655040] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.661721] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.669119] NET: Registered protocol family 1
[ 0.678908] Crashlog allocated RAM at address 0x1f00000
[ 0.686531] workingset: timestamp_bits=30 max_order=13 bucket_order=0
[ 0.700537] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.707156] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORI.
[ 0.728629] io scheduler noop registered
[ 0.733150] io scheduler deadline registered (default)
[ 0.739291] Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
[ 0.746971] console [ttyS0] disabled
[ 0.771191] serial8250.0: ttyS0 at MMIO 0x18020000 (irq = 11, base_baud = 15A
[ 0.781001] console [ttyS0] enabled
[ 0.781001] console [ttyS0] enabled
[ 0.788542] bootconsole [early0] disabled
[ 0.788542] bootconsole [early0] disabled
[ 0.801065] m25p80 spi0.0: found gd25q128, expected m25p80
[ 0.809261] m25p80 spi0.0: gd25q128 (16384 Kbytes)
[ 0.814611] 5 tp-link partitions found on MTD device spi0.0
[ 0.820408] Creating 5 MTD partitions on "spi0.0":
[ 0.825363] 0x000000000000-0x000000020000 : "u-boot"
[ 0.832612] 0x000000020000-0x0000001529fc : "kernel"
[ 0.840053] 0x0000001529fc-0x000000ff0000 : "rootfs"
[ 0.846886] mtd: device 2 (rootfs) set to be root filesystem
[ 0.852865] 1 squashfs-split partitions found on MTD device rootfs
[ 0.859259] 0x000000370000-0x000000ff0000 : "rootfs_data"
[ 0.867143] 0x000000ff0000-0x000001000000 : "art"
[ 0.874329] 0x000000020000-0x000000ff0000 : "firmware"
[ 0.882963] libphy: Fixed MDIO Bus: probed
[ 0.911726] libphy: ag71xx_mdio: probed
[ 1.542334] ag71xx-mdio.1: Found an AR934X built-in switch
[ 1.595684] eth0: Atheros AG71xx at 0xba000000, irq 5, mode:GMII
[ 2.232718] ag71xx ag71xx.0: connected to PHY at ag71xx-mdio.1:04 [uid=004dd]
[ 2.242947] eth1: Atheros AG71xx at 0xb9000000, irq 4, mode:MII
[ 2.250913] NET: Registered protocol family 10
[ 2.259561] NET: Registered protocol family 17
[ 2.264412] 8021q: 802.1Q VLAN Support v1.8
[ 2.276187] VFS: Mounted root (squashfs filesystem) readonly on device 31:2.
[ 2.285028] Freeing unused kernel memory: 236K
[ 2.289620] This architecture does not have kernel memory protection.
[ 2.539772] random: fast init done
[ 4.137417] init: Console is alive
[ 4.141287] init: - watchdog -
[ 4.940871] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[ 5.157816] kmodloader: done loading kernel modules from /etc/modules-boot.d*
[ 5.176509] init: - preinit -
[ 6.228094] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 6.257123] random: procd: uninitialized urandom read (4 bytes read)
Press the [f] key and hit [enter] to enter failsafe mode
Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
[ 7.861891] eth0: link up (1000Mbps/Full duplex)
[ 7.866703] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 9.970982] jffs2: notice: (369) jffs2_build_xattr_subsystem: complete build.
[ 9.989203] mount_root: overlay filesystem has not been fully initialized yet
[ 10.036008] mount_root: switching to jffs2 overlay
- config restore -
[ 10.454328] urandom-seed: Seed file not found (/etc/urandom.seed)
[ 10.494467] eth0: link down
[ 10.510814] procd: - early -
[ 10.513912] procd: - watchdog -
[ 11.269845] procd: - watchdog -
[ 11.273424] procd: - ubus -
[ 12.071002] random: ubusd: uninitialized urandom read (4 bytes read)
[ 12.078772] random: ubusd: uninitialized urandom read (4 bytes read)
[ 12.085913] random: ubusd: uninitialized urandom read (4 bytes read)
[ 12.093418] procd: - init -
Please press Enter to activate this console.
[ 12.772949] kmodloader: loading kernel modules from /etc/modules.d/*
[ 12.784186] ip6_tables: (C) 2000-2006 Netfilter Core Team
[ 12.801526] Loading modules backported from Linux version wt-2017-11-01-0-gf0
[ 12.809870] Backport generated by backports.git v4.14-rc2-1-31-g86cf0e5d
[ 12.820002] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 12.833749] nf_conntrack version 0.5.0 (1024 buckets, 4096 max)
[ 12.896972] xt_time: kernel timezone is -0000
[ 12.961371] PPP generic driver version 2.4.2
[ 12.968373] NET: Registered protocol family 24
[ 13.022581] Data bus error, epc == 8089f89c, ra == 8089f898
[ 13.028356] Oops[#1]:
[ 13.030707] CPU: 0 PID: 438 Comm: kmodloader Not tainted 4.9.119 #0
[ 13.037181] task: 81890a60 task.stack: 80fbc000
[ 13.041852] $ 0 : 00000000 00000025 00000500 00014000
[ 13.047290] $ 4 : b81143fc 000143fc 00014000 00000004
[ 13.052719] $ 8 : 00000001 7c7c3c7c 7c7c7c7c 7c7c7c7c
[ 13.058150] $12 : 7c7c3c7c 8045d910 00000000 7c7c7c3c
[ 13.063579] $16 : 80de0010 00000018 00000000 00030000
[ 13.069009] $20 : 00010000 00031018 00000004 000003ff
[ 13.074439] $24 : 00000000 1fb7dfa9
[ 13.079869] $28 : 80fbc000 80fbda28 80fbda7c 8089f898
[ 13.085299] Hi : 00000003
[ 13.088273] Lo : 000000ff
[ 13.091253] epc : 8089f89c 0x8089f89c [ath9k_hw@80880000+0x51020]
[ 13.097725] ra : 8089f898 0x8089f898 [ath9k_hw@80880000+0x51020]
[ 13.104187] Status: 1000f403 KERNEL EXL IE
[ 13.108534] Cause : 5080801c (ExcCode 07)
[ 13.112673] PrId : 00019374 (MIPS 24Kc)
[ 13.116721] Modules linked in: ath9k(+) ath9k_common pppoe ppp_async ath9k_hg
[ 13.175998] Process kmodloader (pid: 438, threadinfo=80fbc000, task=81890a60)
[ 13.184611] Stack : 45ab5517 53047dbc e2789968 d319b434 96ac3c5d 27be66e4 000
[ 13.193301] 80e19000 80de0010 80fbdb0c 00000004 808cc838 80de0434 004
[ 13.201993] 80817b85 00000004 803d0000 80de0010 00000220 ffffffff 000
[ 13.210683] 803d9488 80883c54 b8100000 00000000 00000000 00000000 000
[ 13.219374] 80de0010 80de0038 00008000 00000001 80fbdb0c 00000004 809
[ 13.228066] ...
[ 13.230602] Call Trace:[ 13.232953] [<808a0000>] 0x808a0000 [ath9k_hw@8088]
[ 13.239102] [<8089e6f4>] 0x8089e6f4 [ath9k_hw@80880000+0x51020]
[ 13.245221] [<8089ffb0>] 0x8089ffb0 [ath9k_hw@80880000+0x51020]
[ 13.251334] [<80883c54>] 0x80883c54 [ath9k_hw@80880000+0x51020]
[ 13.257461] [<8089303c>] 0x8089303c [ath9k_hw@80880000+0x51020]
[ 13.263572] [<80092708>] 0x80092708
[ 13.267179] [<80886380>] 0x80886380 [ath9k_hw@80880000+0x51020]
[ 13.273295] [<801c237c>] 0x801c237c
[ 13.276893] [<80108ff4>] 0x80108ff4
[ 13.280496] [<801c2258>] 0x801c2258
[ 13.284101] [<80092708>] 0x80092708
[ 13.287706] [<80802458>] 0x80802458 [ath9k@80800000+0x15d50]
[ 13.293557] [<800ac1e0>] 0x800ac1e0
[ 13.297165] [<80900534>] 0x80900534 [mac80211@80900000+0x5fac0]
[ 13.303276] [<8080e258>] 0x8080e258 [ath9k@80800000+0x15d50]
[ 13.309118] [<80162360>] 0x80162360
[ 13.312739] [<8021eec8>] 0x8021eec8
[ 13.316341] [<80164da8>] 0x80164da8
[ 13.319947] [<8021d558>] 0x8021d558
[ 13.323551] [<80360db8>] 0x80360db8
[ 13.327153] [<8021d69c>] 0x8021d69c
[ 13.330751] [<8021b80c>] 0x8021b80c
[ 13.334357] [<8021d618>] 0x8021d618
[ 13.337955] [<8021b8c4>] 0x8021b8c4
[ 13.341557] [<803610d0>] 0x803610d0
[ 13.345159] [<8021b710>] 0x8021b710
[ 13.348765] [<8021cbf8>] 0x8021cbf8
[ 13.352363] [<8009c80c>] 0x8009c80c
[ 13.355968] [<800918b8>] 0x800918b8
[ 13.359567] [<800a2f7c>] 0x800a2f7c
[ 13.363173] [<80816000>] 0x80816000 [ath9k@80800000+0x15d50]
[ 13.369011] [<8021de08>] 0x8021de08
[ 13.372613] [<80091d74>] 0x80091d74
[ 13.376227] [<80816000>] 0x80816000 [ath9k@80800000+0x15d50]
[ 13.382069] [<80816018>] 0x80816018 [ath9k@80800000+0x15d50]
[ 13.387910] [<800609f4>] 0x800609f4
[ 13.391510] [<800a2d68>] 0x800a2d68
[ 13.395111] [<80091df8>] 0x80091df8
[ 13.398714] [<8008f7b0>] 0x8008f7b0
[ 13.402321] [<8008f2ac>] 0x8008f2ac
[ 13.405930] [<800d4c78>] 0x800d4c78
[ 13.409528] [<80103b1c>] 0x80103b1c
[ 13.413135] [<800c89b4>] 0x800c89b4
[ 13.416733] [<800c6b68>] 0x800c6b68
[ 13.420338] [<8010402c>] 0x8010402c
[ 13.423937] [<800c8ba4>] 0x800c8ba4
[ 13.427539] [<800c8c2c>] 0x800c8c2c
[ 13.431144] [<8006f20c>] 0x8006f20c
[ 13.434744] [<801c0a58>] 0x801c0a58
[ 13.438345]
[ 13.439881] Code: 0040f809 02002025 8e0201e0 <24030300> 1043001d 24030400
[ 13.450014]
[ 13.451665] ---[ end trace 861c3fcc143885c4 ]---
[ 13.458227] Kernel panic - not syncing: Fatal exception
[ 13.464601] Rebooting in 1 seconds..
Can anyone tell me why this is happening. The router is a Tl-wr840 V2.2 with QCA9533-BL3A SOC and 32 Mb of ram.
