[FS#330] xrx200-net: kenrel panic

[LEDE Bugs]

The following task has a new comment added:

FS#330 - xrx200-net: kenrel panic
User who did this - Michael Thomson (michthom)

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Hmm. I can't reproduce the "fix" of flashing the same (patched) image twice - I get reboots with Ethernet connected.
One possible red herring...
When I was doing a TFTP boot, before sys upgrade, on two occasions the connection was not (immediately) ready. ON both occasions the install image did seem to load, but when I used bootm I got a *different* crash, see below.
I'd just switched from the LAN to a direct connection to my Mac (the tftp server).

[    1.958193] init: Console is alive
[    1.960431] init: - watchdog -
[    1.978905] exFAT: Version 1.2.9
[    2.020715] SCSI subsystem initialized
[    2.031326] dwc2 1e101000.ifxhcd: requested GPIO 495
[    2.034930] dwc2 1e101000.ifxhcd: Configuration mismatch. Forcing host mode
[    2.898313] dwc2 1e101000.ifxhcd: DWC OTG Controller
[    2.901912] dwc2 1e101000.ifxhcd: new USB bus registered, assigned bus number 1
[    2.909219] dwc2 1e101000.ifxhcd: irq 62, io mem 0x00000000
[    2.914762] dwc2 1e101000.ifxhcd: Hardware does not support descriptor DMA mode -
[    2.922193] dwc2 1e101000.ifxhcd: falling back to buffer DMA mode.
[    2.929701] hub 1-0:1.0: USB hub found
[    2.932650] hub 1-0:1.0: 1 port detected
[    2.940395] usbcore: registered new interface driver usb-storage
[    2.955456] init: - preinit -
[    3.120557] random: procd: uninitialized urandom read (4 bytes read, 13 bits of entropy available)
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
[    3.314149] usb 1-1: new high-speed USB device number 2 using dwc2
[    3.515649] usb-storage 1-1:1.0: USB Mass Storage device detected
[    3.521725] scsi host0: usb-storage 1-1:1.0
[    4.523474] scsi 0:0:0:0: Direct-Access     SanDisk  Cruzer Glide     1.27 PQ: 0 ANSI: 6
[    4.533609] sd 0:0:0:0: [sda] 31266816 512-byte logical blocks: (16.0 GB/14.9 GiB)
[    4.541347] sd 0:0:0:0: [sda] Write Protect is off
[    4.545262] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[    4.570660]  sda: sda1
[    4.576816] sd 0:0:0:0: [sda] Attached SCSI removable disk
[    5.378253] eth0: port 2 got link
[    5.481081] CPU 0 Unable to handle kernel paging request at virtual address fffffffe, epc == ffffffff, ra == 802e5818
[    5.490290] Oops[#1]:
[    5.492514] CPU: 0 PID: 0 Comm: swapper Not tainted 4.4.30 #0
[    5.498254] task: 804dad98 ti: 804d4000 task.ti: 804d4000
[    5.503645] $ 0   : 00000000 80a70000 ffffffff 00000000
[    5.508866] $ 4   : 8e0a704f 87c0f600 00000020 00000000
[    5.514088] $ 8   : 0000003c 87e436fe 00000000 00000004
[    5.519311] $12   : 00000000 000000b9 00000000 00000000
[    5.524533] $16   : 87c0f600 8e0a704f 87c0f600 8e0a704f
[    5.529755] $20   : 00000000 c0000000 00000020 87dc8800
[    5.534978] $24   : 804d6034 80028818                  
[    5.540200] $28   : 804d4000 804d5cb8 80a9c8b8 802e5818
[    5.545423] Hi    : 002884f8
[    5.548296] Lo    : a4800000
[    5.551176] epc   : ffffffff 0xffffffff
[    5.555023] ra    : 802e5818 eth_type_trans+0x30/0x210
[    5.560133] Status: 1100fc03 KERNEL EXL IE 
[    5.564313] Cause : 10800008 (ExcCode 02)
[    5.568316] BadVA : fffffffe
[    5.571189] PrId  : 00019556 (MIPS 34Kc)
[    5.575103] Modules linked in: usb_storage dwc2 sd_mod scsi_mod gpio_button_hotplug ext4 jbd2 mbcache exfat crc32c_generic
[    5.586165] Process swapper (pid: 0, threadinfo=804d4000, task=804dad98, tls=00000000)
[    5.594078] Stack : 804d4000 804d5ce0 80a9c8b8 802c6880 80a9cce0 7100003c 87c0f600 80a9cce0
          0000003c 80276328 00000003 804d9b70 804d9bd8 80063f58 8000003f 804912b4
          80a9cce0 00000020 00000008 0000012c 804da8a0 804d5d40 fffee047 804e0000
          804e0000 802c6880 00000000 00000000 00000007 804dfdc8 804e0000 804a7714
          804d0000 804a7a24 804d5d40 804d5d40 804d5d48 804d5d48 80a73f54 00000004
          ...
[    5.629591] Call Trace:
[    5.632054] [] net_rx_action+0x118/0x2e0
[    5.636830] [] xrx200_poll_rx+0x134/0x1d8
[    5.641716] [] hrtimer_interrupt+0x110/0x270
[    5.646835] [] net_rx_action+0x118/0x2e0
[    5.651638] [] __do_softirq+0x2a0/0x2b8
[    5.656319] [] handle_level_irq+0x100/0x170
[    5.661383] [] ltq_hw_irqdispatch+0xa8/0xe4
[    5.666418] [] ret_from_irq+0x0/0x4
[    5.670790] [] pick_next_task_fair+0x1cc/0x294
[    5.676093] [] r4k_wait_irqoff+0x0/0x20
[    5.680785] [] cpu_startup_entry+0xa0/0xf4
[    5.685740] [] schedule_preempt_disabled+0x10/0x1c
[    5.691398] [] r4k_wait_irqoff+0x18/0x20
[    5.696198] [] rest_init+0x64/0x74
[    5.700466] [] start_kernel+0x46c/0x488
[    5.705152] [] unknown_bootoption+0x0/0x290
[    5.710203] 
[    5.711669] 
Code: (Bad address in epc)
[    5.715585] 
[    5.717110] ---[ end trace a57d690884b72863 ]---
[    5.724182] Kernel panic - not syncing: Fatal exception in interrupt
[    5.730377] Rebooting in 1 seconds..
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=330#comment1460