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["john.d@xxxxxxxxxxxx" <john.d@xxxxxxxxxxxx>]

I enabled kgdboc=ttyS0,115200 and caught this :


[   71.145241] input: Barcode Reader  as /devices/ffe000000.soc/ffe210000.usb/fsl-ehci.0/usb1/1-1/1-1.3/1-1.3:1.1/input/input1
[   71.145493] hid-generic 0003:13BA:0018.0002: input,hidraw1: USB HID v1.10 Mouse [Barcode Reader ] on usb-fsl-ehci.0-1.3/input1
[   71.206233] md: raid6 personality registered for level 6
[   71.206235] md: raid5 personality registered for level 5
[   71.206236] md: raid4 personality registered for level 4
[   71.260531] md: raid10 personality registered for level 10
[   71.664609] udlfb: DisplayLink USB device /dev/fb0 attached. 1440x900 resolution. Using 5064K framebuffer memory
[   71.934176] IPv6: ADDRCONF(NETDEV_UP): eth2: link is not ready
[   72.083988] IPv6: ADDRCONF(NETDEV_UP): eth3: link is not ready
[   73.549288] tg3 0000:01:00.0 eth2: Link is up at 100 Mbps, full duplex

Entering kdb (current=0xe62b8000, pid 74) on processor 1 Oops: (null)
due to oops @ 0x0
dCPU: 1 PID: 74 Comm: kworker/1:1 Tainted: G        W    3.13.9+ #3
dWorkqueue: events linkwatch_event
dtask: e62b8000 ti: e6396000 task.ti: e6396000
NIP: 00000000 LR: c00885ac CTR: 00000000
REGS: e6397ca0 TRAP: 0400   Tainted: G        W     (3.13.9+)
MSR: 00021002 <CE,ME>  CR: 22ad2e28  XER: 00000000

GPR00: c00885ac e6397d50 e62b8000 d1826900 c0b0b340 00000005 448130bc 00000011 
GPR08: 00000000 00000000 00000011 204c2f00 00000000 00000000 c0078250 e62c7920 
GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 d1826680 
GPR24: c0b60000 10d20000 c0b06900 c0b06900 c0b80e18 e6396000 d1826900 c0b0b340 
NIP [00000000]   (null)
LR [c00885ac] ttwu_do_activate.constprop.70+0x4c/0x90
Call Trace:
[e6397d50] [c00885ac] ttwu_do_activate.constprop.70+0x4c/0x90 (unreliable)
[e6397d60] [c0089d80] scheduler_ipi+0xb0/0x1e0
[e6397d90] [c00126d0] smp_ipi_demux+0xa0/0xf0
[e6397db0] [c0010250] doorbell_exception+0x70/0xa0
[e6397dd0] [c0010bb0] ret_from_except_full+0x0/0x4c
--- Exception: 2070 at linkwatch_event+0x0/0x50
    LR = process_one_work+0x14c/0x3e0
[e6397e90] [c006fef8] process_one_work+0x128/0x3e0 (unreliable)
[e6397ec0] [c00708d4] worker_thread+0x134/0x3e0
[e6397ef0] [c0078324] kthread+0xd4/0xf0
[e6397f40] [c001068c] ret_from_kernel_thread+0x5c/0x64

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https://bugs.launchpad.net/bugs/1279403

Title:
  tg3 driver hangs in iscsi booted initrd : (trusty)

Status in “linux-ppc” package in Ubuntu:
  New

Bug description:
  Testing saucy iscsi target  booted  on e500mc  default initrd hangs
  when tg3 driver started.

  saucy was installed to an iSCSI target using the interactive setup from:
    
     http://ports.ubuntu.com/dists/saucy/main/installer-powerpc/current/images/e500mc/netboot/vmlinux
     http://ports.ubuntu.com/dists/saucy/main/installer-powerpc/current/images/e500mc/netboot/initrd.gz

  Linux version 3.11.0-5-powerpc-e500mc 
  initrd.img-3.11.0-5-powerpc-e500mc

  Booted from flash USB to simulate a pxe boot.

  svy-boot# 
  svy-boot# mount /dev/sda1 /mnt
  svy-boot# cd /mnt/iscsi2
  svy-boot# ./go.sh
   /sbin/kexec --command='root=/dev/ram ro UUID=1cfe9f29-e188-4e00-ac47-3bf2245b117f ro break debug interface=eth4 console=tty0 console=ttyS0,115200 dhcp ISCSI_INITIATOR=iqn.1993-08.org.debian:01:53694d75a62e ISCSI_TARGET_NAME=iqn.2001-04.com.jade:storage.disk0 ISCSI_TARGET_IP=192.168.1.140 ISCSI_TARGET_PORT=3260 ISCSI_TARGET_GROUP=1 ' --initrd=/mnt/iscsi2/initrd.img-3.11.0-5-powerpc-e500mc -l /mnt/iscsi2/vmlinux-3.11.0-5-powerpc-e500mc 

  
  with break enabled I can enter cli in the initramfs 

       -> This is embedded  fsl  eth1  ( 1Gbe ) with  a cable :

  (initramfs) ipconfig -t 10 -c dhcp -d eth1 &
  (initramfs) IP-Config: eth1 hardware address 02:30:b0:00:10:01 mtu 1500 DHCP
  IP-Config: no response after 10 secs - giving up

     -> System is alive ( I have a prompt )  - The above SHOULD HAVE
  WORKED since it is an  active port.

  This is embedded fsl eth1 - (10Gbe) - No cable

  (initramfs) ipconfig -t 10 -c dhcp -d eth0 &
  (initramfs)
  (initramfs) IP-Config: eth0 hardware address 02:30:b0:00:10:00 mtu 1500 DHCP
  IP-Config: no response after 10 secs - giving up

    -> System is alive ( I have a prompt)

              tg3 stand up card in pci-e slot:

  (initramfs) ipconfig -t 10 -c dhcp -d eth4 &
  (initramfs)
  (initramfs) [  218.394187] IPv6: ADDRCONF(NETDEV_UP): eth4: link is not ready
  (initramfs)
  (initramfs) [  221.268533] tg3 0000:01:00.1 eth4: Link is up at 1000 Mbps, full duplex

  < hung >

  
  iSCSI  target information:

  Server: CentOS 6.4 .x64 .

  #passwd setup 
  #
  # tgtadm --lld iscsi --op new --mode account --user ronnie --password password
  # tgtadm --lld iscsi --op bind --mode account --tid 1 --user ronnie
  #
  # dd if=/dev/zero of=iscsi.disk0 bs=1024M count=10


  
  tgtadm --lld iscsi --op delete  --mode target --tid 1

  tgtadm --lld iscsi --op new --mode target --tid 1 -T iqn.2001-04.com.jade:storage.disk0
  tgtadm  --lld iscsi --op new --mode logicalunit --tid 1 --lun 1 -b  `pwd`/iscsi.disk0

  
  tgtadm --lld iscsi --op bind --mode target --tid 1 -I ALL
  tgtadm --lld iscsi --op show --mode target

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