Re: [PATCH 1/3] iscsi class: delay freeing target_id

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On 7/1/20 12:47 PM, Mike Christie wrote:
> If we are doing async removal of the session, we could be doing a
> scsi_remove_target from the removal workqueue, and for the offload
> case we could be doing a new session addition and scan to the same
> host. The add/scan might then end up trying to use the target_id
> of the target we are removing.
> 
> This patch just has a delay the freeing of the target_id until after
> the scsi_remove_target has completed, so we know it's no longer in
> use.

Nit: "has a delay" => "delays"
> 
> Signed-off-by: Mike Christie <michael.christie@xxxxxxxxxx>
> ---
>  drivers/scsi/scsi_transport_iscsi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
> index 7ae5024e7824..2cd2610ecfaf 100644
> --- a/drivers/scsi/scsi_transport_iscsi.c
> +++ b/drivers/scsi/scsi_transport_iscsi.c
> @@ -2036,11 +2036,11 @@ static void __iscsi_unbind_session(struct work_struct *work)
>  	spin_unlock_irqrestore(&session->lock, flags);
>  	mutex_unlock(&ihost->mutex);
>  
> +	scsi_remove_target(&session->dev);
> +
>  	if (session->ida_used)
>  		ida_simple_remove(&iscsi_sess_ida, target_id);
>  
> -	scsi_remove_target(&session->dev);
> -
>  unbind_session_exit:
>  	iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
>  	ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
> 

Reviewed-by: Lee Duncan <lduncan@xxxxxxxx>




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