System reboot gets hung when IMSM raid array is undergoing resync

Issue

• System reboot gets hung when Intel IMSM or VROC raid array is undergoing resync:

  Console logs at the time of shutdown hang:

  md: md126: resync interrupted.
  INFO: task reboot:6085 blocked for more than 120 seconds.
        Not tainted 4.18.0-372.9.1.el8.x86_64 #1
  "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  task:reboot          state:D stack:    0 pid: 6085 ppid:     1 flags:0x00004080
  Call Trace:
   __schedule+0x2d1/0x830
   schedule+0x35/0xa0
   raid5_quiesce+0x12b/0x2d0 [raid456]
   ? finish_wait+0x80/0x80
   __md_stop_writes+0x68/0x110
   md_notify_reboot+0x51/0xf0
   notifier_call_chain+0x47/0x70
   blocking_notifier_call_chain+0x3e/0x60
   kernel_restart_prepare+0x19/0x40
   kernel_restart+0xe/0x30
   __do_sys_reboot+0x1d2/0x210
   ? __fput+0xd0/0x250
   ? syscall_trace_enter+0x1fb/0x2c0
   ? __audit_syscall_exit+0x249/0x2a0
   do_syscall_64+0x5b/0x1a0
   entry_SYSCALL_64_after_hwframe+0x65/0xca
  RIP: 0033:0x7f213597a4b7
  Code: Unable to access opcode bytes at RIP 0x7f213597a48d.
  RSP: 002b:00007ffc233307d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a9
  RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f213597a4b7
  RDX: 0000000001234567 RSI: 0000000028121969 RDI: 00000000fee1dead
  RBP: 00007ffc23330820 R08: 0000000000000002 R09: 0000000000000000
  R10: 000000000000004b R11: 0000000000000246 R12: 0000000000000001
  R13: 00000000fffffffe R14: 0000000000000006 R15: 0000000000000000