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** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Tags added: bionic

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https://bugs.launchpad.net/bugs/1861219

Title:
  QLogic FC paths added when issue_lip

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  My QLogic direct-connect SANboot host with Ubuntu Server 18.04 LTS is
  seeing paths added during testing.  Specifically added when running
  the command below:

  echo 1 > /sys/class/fc_host/host15/issue_lip

  There should be four paths total but if I run the command above five
  times, I will see nine total paths.  The server will hang and require
  a reboot eventually as multiple hung_task_timeout errors show up in
  logs.

  Information on HBAs below:

  root@ICTM1607S02H4:~# cat /sys/class/fc_host/host*/symbolic_name
  QLE2742 FW:v8.08.231 DVR:v10.00.00.02-k
  QLE2742 FW:v8.08.231 DVR:v10.00.00.02-k
  QLE2692 FW:v8.08.231 DVR:v10.00.00.02-k
  QLE2692 FW:v8.08.231 DVR:v10.00.00.02-k

  An example of what a volume looks like in multipath -ll after the
  issue_lip occurs:

  root@ICTM1607S02H4:~# multipath -ll
  36d039ea0003ebb140000009e58b1fabf dm-3 NETAPP,INF-01-00
  size=160G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 alua' 
wp=rw
  |-+- policy='service-time 0' prio=50 status=active
  | |- 13:0:0:0   sdl 8:176  active ready running
  | |- 15:0:0:0   sdq 65:0   active ready running
  | `- 15:0:1:0   sdv 65:80  active ready running
  `-+- policy='service-time 0' prio=10 status=enabled
    |- 12:0:0:0   sdb 8:16   active ready running
    `- 14:0:0:0   sdc 8:32   active ready running

  Notice how a path is added after issue_lip.

  1) version_signature.log
  Ubuntu 4.15.0-74.84-generic 4.15.18

  2) lspci -vnvn output is in a file attached.

  
  root@ICTM1607S02H4:~# lsb_release -rd
  Description:    Ubuntu 18.04.3 LTS
  Release:        18.04

  
  root@ICTM1607S02H4:~# apt-cache policy linux-image-generic
  linux-image-generic:
    Installed: 4.15.0.74.76
    Candidate: 4.15.0.74.76
    Version table:
   *** 4.15.0.74.76 500
          500 http://repomirror-ict.eng.netapp.com/ubuntu bionic-updates/main 
amd64 Packages
          500 http://repomirror-ict.eng.netapp.com/ubuntu bionic-security/main 
amd64 Packages
          100 /var/lib/dpkg/status
       4.15.0.20.23 500
          500 http://repomirror-ict.eng.netapp.com/ubuntu bionic/main amd64 
Packages

  I expected the bus reset to quickly add and remove, but it seems
  removal is not happening.  The number of paths grow after each bus
  reset causing instability with the OS.

  I have attached logs.zip which contains four files.

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