scsi: target: stash sess_err_stats on Data-Out timeout

sess_err_stats are currently filled on NOP ping timeout, but not Data-Out
timeout. Stash details of Data-Out timeouts using a
ISCSI_SESS_ERR_CXN_TIMEOUT value for last_sess_failure_type.

Signed-off-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/target/iscsi/iscsi_target_erl1.c

@@ -1230,6 +1230,7 @@ void iscsit_handle_dataout_timeout(struct timer_list *t)
 
 failure:
 	spin_unlock_bh(&cmd->dataout_timeout_lock);
+	iscsit_fill_cxn_timeout_err_stats(sess);
 	iscsit_cause_connection_reinstatement(conn, 0);
 	iscsit_dec_conn_usage_count(conn);
 }