Re: [PATCH 1/2] iscsi: Unblock session then wake up error handler

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On 11/5/21 3:10 PM, Mike Christie wrote:
> We can race where iscsi_session_recovery_timedout has woken up the error
> handler thread and it's now setting the devices to offline, and
> session_recovery_timedout's call to scsi_target_unblock is also trying to
> set the device's state to transport-offline. We can then get a mix of
> states.
> 
> For the case where we can't relogin we want the devices to be in
> transport-offline so when we have repaired the connection
> __iscsi_unblock_session can set the state back to running. So this patch
> has us set the device state then call into libiscsi to wake up the error
> handler.
> 
> Signed-off-by: Mike Christie <michael.christie@xxxxxxxxxx>
> ---
>  drivers/scsi/scsi_transport_iscsi.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
> index 78343d3f9385..554b6f784223 100644
> --- a/drivers/scsi/scsi_transport_iscsi.c
> +++ b/drivers/scsi/scsi_transport_iscsi.c
> @@ -1899,12 +1899,12 @@ static void session_recovery_timedout(struct work_struct *work)
>  	}
>  	spin_unlock_irqrestore(&session->lock, flags);
>  
> -	if (session->transport->session_recovery_timedout)
> -		session->transport->session_recovery_timedout(session);
> -
>  	ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
>  	scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
>  	ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
> +
> +	if (session->transport->session_recovery_timedout)
> +		session->transport->session_recovery_timedout(session);
>  }
>  
>  static void __iscsi_unblock_session(struct work_struct *work)
> 

Reviewed-by: Lee Duncan <lduncan@xxxxxxxx>




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