You have been subscribed to a public bug:

---Problem Description---
FC Adapter goes offline and produces the call traces while booting into OS, on 
assigning the LUNs to it.
 
---uname output---
Linux ltciofvtr-firestone1 4.9.0-12-generic #13-Ubuntu SMP Tue Jan 10 12:52:39 
UTC 2017 ppc64le ppc64le ppc64le GNU/Linux
 
FC Redfish Adapter(32 GB) is going offline on assigning the Luns to it. Adapter 
shows online till pettitboot and even Luns are also vissible in pettitboot.
once selecting the OS from pettitboot and booting into it, it produces call 
traces and also few lpfc errors. attached the comple console logs FYR.
The FC switch to which the Redfish adapter is connected is a 16 GB switch and 
the adapter is of 32 GB. According to me this parameter should not have any 
concern as the adapter has to support backward compatibility. 

---Steps to Reproduce---
1. install the adapter in a server. and connect it to FC switch (16 GB)
2. create zone and assign the LUNS to it from V7000.
3. reboot the OS


root@ltciofvtr-firestone1:~# ll /sys/class/fc_host/
total 0
drwxr-xr-x  2 root root 0 Jan 25 04:22 ./
drwxr-xr-x 72 root root 0 Jan 25 03:50 ../
lrwxrwxrwx  1 root root 0 Jan 25 04:13 host10 -> 
../../devices/pci0001:00/0001:00:00.0/0001:01:00.1/host10/fc_host/host10/
lrwxrwxrwx  1 root root 0 Jan 25 04:13 host6 -> 
../../devices/pci0000:00/0000:00:00.0/0000:01:00.0/host6/fc_host/host6/
lrwxrwxrwx  1 root root 0 Jan 25 04:13 host8 -> 
../../devices/pci0000:00/0000:00:00.0/0000:01:00.1/host8/fc_host/host8/
lrwxrwxrwx  1 root root 0 Jan 25 04:13 host9 -> 
../../devices/pci0001:00/0001:00:00.0/0001:01:00.0/host9/fc_host/host9/
root@ltciofvtr-firestone1:~# 
root@ltciofvtr-firestone1:~# cat /sys/class/fc_host/host6/port_state 
Offline
root@ltciofvtr-firestone1:~# cat /sys/class/fc_host/host8/port_state 
Offline
root@ltciofvtr-firestone1:~# cat /sys/class/fc_host/host9/port_state 
Online
root@ltciofvtr-firestone1:~# cat /sys/class/fc_host/host10/port_state 
Online
root@ltciofvtr-firestone1:~# 
root@ltciofvtr-firestone1:~# lspci -nn | grep -i fibre
0000:01:00.0 Fibre Channel [0c04]: Emulex Corporation Lancer Gen6: LPe32000 
Fibre Channel Host Adapter [10df:e300] (rev 01)
0000:01:00.1 Fibre Channel [0c04]: Emulex Corporation Lancer Gen6: LPe32000 
Fibre Channel Host Adapter [10df:e300] (rev 01)
0001:01:00.0 Fibre Channel [0c04]: Emulex Corporation Lancer-X: LightPulse 
Fibre Channel Host Adapter [10df:e200] (rev 10)
0001:01:00.1 Fibre Channel [0c04]: Emulex Corporation Lancer-X: LightPulse 
Fibre Channel Host Adapter [10df:e200] (rev 10)
root@ltciofvtr-firestone1:~# 


Device driver error code:
 [  537.317563] lpfc 0000:01:00.1: 1:0338 IOCB wait timeout error - no wake 
response Data x3c
[  537.317755] lpfc 0000:01:00.1: 1:(0):0727 TMF FCP_LUN_RESET to TGT 1 LUN 0 
failed (0, 0) iocb_flag x206
[  537.317934] lpfc 0000:01:00.1: 1:(0):0713 SCSI layer issued Device Reset (1, 
0) return x2007
[  537.318005] lpfc 0000:01:00.1: 1:0372 iotag x0 is out off range: max iotag 
(x880)
[  551.653563] lpfc 0000:01:00.0: 0:(0):0748 abort handler timed out waiting 
for abortng I/O (xri:x149) to complete: ret 0x2003, ID 1, LUN 1
[  551.653795] lpfc 0000:01:00.0: 0:0372 iotag x0 is out off range: max iotag 
(x880)
[  598.757557] lpfc 0000:01:00.1: 1:0338 IOCB wait timeout error - no wake 
response Data x3c
[  598.757766] lpfc 0000:01:00.1: 1:(0):0727 TMF FCP_LUN_RESET to TGT 1 LUN 1 
failed (0, 0) iocb_flag x206
[  598.757946] lpfc 0000:01:00.1: 1:(0):0713 SCSI layer issued Device Reset (1, 
1) return x2007
[  598.758017] lpfc 0000:01:00.1: 1:0372 iotag x0 is out off range: max iotag 
(x880)
[  613.093562] lpfc 0000:01:00.0: 0:(0):0748 abort handler timed out waiting 
for abortng I/O (xri:x14f) to complete: ret 0x2003, ID 1, LUN 0
[  613.093630] INFO: task systemd-udevd:1148 blocked for more than 120 seconds.
[  613.093631]       Not tainted 4.9.0-12-generic #13-Ubuntu
[  613.093631] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[  613.093632] systemd-udevd   D    0  1148   1141 0x00040000

 
Stack trace output:
 [  613.093633] Call Trace:
[  613.093634] [c000001fd6b5b360] [ffffffffffffffff] 0xffffffffffffffff 
(unreliable)
[  613.093636] [c000001fd6b5b530] [c00000000001c3a0] __switch_to+0x2e0/0x4c0
[  613.093637] [c000001fd6b5b590] [c000000000b188d8] __schedule+0x2f8/0x990
[  613.093638] [c000001fd6b5b670] [c000000000b18fb8] schedule+0x48/0xc0
[  613.093640] [c000001fd6b5b6a0] [c000000000b1d394] 
schedule_timeout+0x274/0x470
[  613.093641] [c000001fd6b5b790] [c000000000b19f8c] wait_for_common+0xec/0x240
[  613.093642] [c000001fd6b5b810] [c0000000000ea27c] flush_work+0x12c/0x270
[  613.093643] [c000001fd6b5b8a0] [c0000000000eca20] 
__cancel_work_timer+0xc0/0x220
[  613.093645] [c000001fd6b5b940] [c00000000059966c] disk_block_events+0xcc/0xe0
[  613.093646] [c000001fd6b5b990] [c00000000037124c] __blkdev_get+0x9c/0x490
[  613.093648] [c000001fd6b5ba00] [c000000000372830] blkdev_get+0x1a0/0x4a0
[  613.093649] [c000001fd6b5bab0] [c0000000003167e0] do_dentry_open+0x2d0/0x470
[  613.093651] [c000001fd6b5bb10] [c00000000032fee4] do_last+0x614/0x1070
[  613.093652] [c000001fd6b5bc00] [c000000000330a1c] path_openat+0xdc/0x480
[  613.093654] [c000001fd6b5bc80] [c00000000033268c] do_filp_open+0xec/0x160
[  613.093655] [c000001fd6b5bdb0] [c00000000031841c] do_sys_open+0x1cc/0x380
[  613.093656] [c000001fd6b5be30] [c00000000000bd84] system_call+0x38/0xe0
[  613.093657] INFO: task systemd-udevd:1155 blocked for more than 120 seconds.
[  613.093658]       Not tainted 4.9.0-12-generic #13-Ubuntu
[  613.093658] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[  613.093659] systemd-udevd   D    0  1155   1141 0x00040002
 
Hi Canonical,

Can you please include these 2 commits to the lpfc driver on 17.04 and 16.04 
HWE ?
They've just been applied on mainline as of 4.11-rc1.

The first resolves this problem, and the second prevents cache/DMA
consistency problems which is likely to be hit in the future with this
higher-performance adapter.

I already asked for both patches to be flagged for stable kernels.

[1] 8ea73db486cda442f0671f4bc9c03a76be398a28 lpfc: Correct WQ creation for 
pagesize 
[2] 6b3b3bdb83b4ad51252d21bb13596db879e51850 lpfc: Add missing memory barrier

Thank you.

[1] 
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/scsi/lpfc?id=8ea73db486cda442f0671f4bc9c03a76be398a28
[2] 
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/scsi/lpfc?id=6b3b3bdb83b4ad51252d21bb13596db879e51850

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-150924 severity-high 
targetmilestone-inin1704
-- 
FC Adapter (LPe32000-based) prints "iotag out of range", goes offline, and 
delays boot a lot (Ubuntu17.04/Emulex/lpfc))
https://bugs.launchpad.net/bugs/1670490
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