IBM System z server got crashed after 'QDIO problem occurred' errors

Issue

• During the storage connectivity issues, couple of IBM System z servers got crashed with following errors:

  sd 1:0:0:120: [sday] FAILED Result: hostbyte=DID_TRANSPORT_DISRUPTED driverbyte=DRIVER_OK cmd_age=0s
  sd 1:0:0:120: [sday] CDB: Test Unit Ready 00 00 00 00 00 00
  zfcp 0.0.0b00: Setting up the QDIO connection to the FCP adapter failed
  qdio: 0.0.0b00 ZFCP on SC 3 using AI:1 QEBSM:1 PRI:1 TDD:1 SIGA: W A 
  [...]
  zfcp 0.0.0b00: A QDIO problem occurred
  zfcp 0.0.0b00: A QDIO problem occurred
  zfcp 0.0.0b00: A QDIO problem occurred
  zfcp 0.0.0b00: A QDIO problem occurred
  Unable to handle kernel pointer dereference at virtual kernel address 0024e3a001100000
  Oops: 0038 [#1] SMP 
  Modules linked in: softdog rpcsec_gss_krb5 auth_rpcgss nfsv4 [...]
  CPU: 4 PID: 1043 Comm: zfcperp0.0.0b00 Kdump: loaded Not tainted 3.10.0-1160.95.1.el7.s390x #1
  task: 0000001fce53a340 ti: 0000001fce304000 task.ti: 0000001fce304000
  Krnl PSW : 0704e00180000000 000003ff80607a24 (zfcp_fsf_req_complete+0x5cc/0x928 [zfcp])
             R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 EA:3
             Krnl GPRS: 000000000015e640 0024e3a001100004 0000000000000000 0000000000000200
             0000001fd0a54600 0000000000000000 0000001fd0a7e800 070000000017c59a
             0000000000000000 0000001fd0a7e800 0000000000000000 0000001fd4aef000
             0000001fd0a7e800 000003ff80610108 000003ff806074b4 0000001fce307b70
  Krnl Code: 000003ff80607a14: a7f4fe2e          brc     15,3ff80607670
             000003ff80607a18: e310a1b80004       lg      %r1,440(%r10)
            #000003ff80607a1e: e31010100004       lg      %r1,16(%r1)
            >000003ff80607a24: e55c10180002       chsi    24(%r1),2
             000003ff80607a2a: a7240079           brc     2,3ff80607b1c
             000003ff80607a2e: e340f0a00004       lg      %r4,160(%r15)
             000003ff80607a34: 58104050           l       %r1,80(%r4)
             000003ff80607a38: a7f4fd72           brc     15,3ff8060751c
  Call Trace:
  ([<000003ff806074b4>] zfcp_fsf_req_complete+0x5c/0x928 [zfcp])
   [<000003ff80608134>] zfcp_fsf_req_dismiss_all+0x124/0x168 [zfcp]
   [<000003ff80600118>] zfcp_erp_adapter_strategy_close.isra.2+0x50/0x90 [zfcp]
   [<000003ff80601254>] zfcp_erp_strategy_do_action+0x25c/0x7c8 [zfcp]
   [<000003ff80601e10>] zfcp_erp_strategy+0x268/0xae0 [zfcp]
   [<000003ff8060274e>] zfcp_erp_thread+0xc6/0x238 [zfcp]
   [<000000000017b652>] kthread+0xea/0xf8
   [<0000000000765d56>] kernel_thread_starter+0x6/0x10
   [<0000000000765d50>] kernel_thread_starter+0x0/0x10
  Last Breaking-Event-Address:
   [<000003ff806074ce>] zfcp_fsf_req_complete+0x76/0x928 [zfcp]
  Kernel panic - not syncing: Fatal exception: panic_on_oops