Re: [PATCH v4 23/37] target: Remove the write_pending_status() callback function

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On Thu, 2017-02-09 at 22:56 -0800, Nicholas A. Bellinger wrote:
> With v4 and v5 changes, tmr_wq blocks on a new cmd->[finished,complete]
> completion after CMD_T_STOP has been set.  CTIO interrupts fire for the
> outstanding WRITE transfer, and tcm_qla2xxx_handle_data_work() returns
> immediately for the aborted qla_tgt_cmd->se_cmd.
> 
> How can that possibly allow the aborted command to continue
> processing..?

The LIO core calls the tcm_qla2xxx .write_pending() callback function to
initiate an asynchronous data transfer from initiator to target. After that
data transfer has finished the tcm_qla2xxx target driver calls
target_execute_cmd(). That function will check the CMD_T_ABORTED flag and
will call target_handle_abort() if that flag has been set. No matter whether
or not that last function decides to queue a response, after all command
references have been dropped the 'complete' completion will be set. The
ABORT TMF waits for that completion.

Bart.--
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