GitLab

In the queue path, move around when we assign sas_task->lldd_task such that
this pointer and the SAS_TASK_AT_INITIATOR flag are set atomically.  It is
also not required to clear SAS_TASK_AT_INITIATOR in isci_task_execute_task()
error path as it is also cleared immediately after in isci_task_refuse()
call.

Now the following items may be considered:

 - SAS_TASK_STATE_DONE and SAS_TASK_AT_INITIATOR are mutually exclusive
   apart from possibly when SAS_TASK_STATE_DONE is set in
   sas_scsi_find_task(), but that is after .lldd_abort_task, i.e. the
   considered callback, is called.

 - If isci_task_refuse() is called in the queue path, then
   sas_task->lldd_task and SAS_TASK_AT_INITIATOR are cleared atomically in
   isci_task_refuse().

 - In the completion path, SAS_TASK_STATE_DONE is set and
   SAS_TASK_AT_INITIATOR is cleared atomically before the
   sas_task.lldd_task is cleared later.

So in isci_task_abort_task() if SAS_TASK_STATE...