scsi: iscsi: Merge suspend fields

[ Upstream commit 5bd856256f ]

Move the tx and rx suspend fields into one flags field.

Link: https://lore.kernel.org/r/20220408001314.5014-8-michael.christie@oracle.com
Tested-by: Manish Rangankar <mrangankar@marvell.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/scsi/bnx2i/bnx2i_hwi.c

@@ -1977,7 +1977,7 @@ static int bnx2i_process_new_cqes(struct bnx2i_conn *bnx2i_conn)
 		if (nopin->cq_req_sn != qp->cqe_exp_seq_sn)
 			break;
 
-		if (unlikely(test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx))) {
+		if (unlikely(test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags))) {
 			if (nopin->op_code == ISCSI_OP_NOOP_IN &&
 			    nopin->itt == (u16) RESERVED_ITT) {
 				printk(KERN_ALERT "bnx2i: Unsolicited "

drivers/scsi/bnx2i/bnx2i_iscsi.c

@@ -1721,7 +1721,7 @@ static int bnx2i_tear_down_conn(struct bnx2i_hba *hba,
 			struct iscsi_conn *conn = ep->conn->cls_conn->dd_data;
 
 			/* Must suspend all rx queue activity for this ep */
-			set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
+			set_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags);
 		}
 		/* CONN_DISCONNECT timeout may or may not be an issue depending
 		 * on what transcribed in TCP layer, different targets behave

drivers/scsi/cxgbi/libcxgbi.c

@@ -1634,11 +1634,11 @@ void cxgbi_conn_pdu_ready(struct cxgbi_sock *csk)
 	log_debug(1 << CXGBI_DBG_PDU_RX,
 		"csk 0x%p, conn 0x%p.\n", csk, conn);
 
-	if (unlikely(!conn || conn->suspend_rx)) {
+	if (unlikely(!conn || test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags))) {
 		log_debug(1 << CXGBI_DBG_PDU_RX,
-			"csk 0x%p, conn 0x%p, id %d, suspend_rx %lu!\n",
+			"csk 0x%p, conn 0x%p, id %d, conn flags 0x%lx!\n",
 			csk, conn, conn ? conn->id : 0xFF,
-			conn ? conn->suspend_rx : 0xFF);
+			conn ? conn->flags : 0xFF);
 		return;
 	}
 

drivers/scsi/libiscsi.c

@@ -1392,8 +1392,8 @@ static bool iscsi_set_conn_failed(struct iscsi_conn *conn)
 	if (conn->stop_stage == 0)
 		session->state = ISCSI_STATE_FAILED;
 
-	set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
-	set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
+	set_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags);
+	set_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags);
 	return true;
 }
 
@@ -1454,7 +1454,7 @@ static int iscsi_xmit_task(struct iscsi_conn *conn, struct iscsi_task *task,
 	 * Do this after dropping the extra ref because if this was a requeue
 	 * it's removed from that list and cleanup_queued_task would miss it.
 	 */
-	if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
+	if (test_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags)) {
 		/*
 		 * Save the task and ref in case we weren't cleaning up this
 		 * task and get woken up again.
@@ -1532,7 +1532,7 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
 	int rc = 0;
 
 	spin_lock_bh(&conn->session->frwd_lock);
-	if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
+	if (test_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags)) {
 		ISCSI_DBG_SESSION(conn->session, "Tx suspended!\n");
 		spin_unlock_bh(&conn->session->frwd_lock);
 		return -ENODATA;
@@ -1746,7 +1746,7 @@ int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc)
 		goto fault;
 	}
 
-	if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
+	if (test_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags)) {
 		reason = FAILURE_SESSION_IN_RECOVERY;
 		sc->result = DID_REQUEUE << 16;
 		goto fault;
@@ -1935,7 +1935,7 @@ static void fail_scsi_tasks(struct iscsi_conn *conn, u64 lun, int error)
 void iscsi_suspend_queue(struct iscsi_conn *conn)
 {
 	spin_lock_bh(&conn->session->frwd_lock);
-	set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+	set_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags);
 	spin_unlock_bh(&conn->session->frwd_lock);
 }
 EXPORT_SYMBOL_GPL(iscsi_suspend_queue);
@@ -1953,7 +1953,7 @@ void iscsi_suspend_tx(struct iscsi_conn *conn)
 	struct Scsi_Host *shost = conn->session->host;
 	struct iscsi_host *ihost = shost_priv(shost);
 
-	set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+	set_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags);
 	if (ihost->workq)
 		flush_workqueue(ihost->workq);
 }
@@ -1961,7 +1961,7 @@ EXPORT_SYMBOL_GPL(iscsi_suspend_tx);
 
 static void iscsi_start_tx(struct iscsi_conn *conn)
 {
-	clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+	clear_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags);
 	iscsi_conn_queue_work(conn);
 }
 
@@ -3324,8 +3324,8 @@ int iscsi_conn_bind(struct iscsi_cls_session *cls_session,
 	/*
 	 * Unblock xmitworker(), Login Phase will pass through.
 	 */
-	clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
-	clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+	clear_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags);
+	clear_bit(ISCSI_CONN_FLAG_SUSPEND_TX, &conn->flags);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(iscsi_conn_bind);

drivers/scsi/libiscsi_tcp.c

@@ -927,7 +927,7 @@ int iscsi_tcp_recv_skb(struct iscsi_conn *conn, struct sk_buff *skb,
 	 */
 	conn->last_recv = jiffies;
 
-	if (unlikely(conn->suspend_rx)) {
+	if (unlikely(test_bit(ISCSI_CONN_FLAG_SUSPEND_RX, &conn->flags))) {
 		ISCSI_DBG_TCP(conn, "Rx suspended!\n");
 		*status = ISCSI_TCP_SUSPENDED;
 		return 0;

include/scsi/libiscsi.h

@@ -52,8 +52,10 @@ enum {
 
 #define ISID_SIZE			6
 
-/* Connection suspend "bit" */
-#define ISCSI_SUSPEND_BIT		1
+/* Connection flags */
+#define ISCSI_CONN_FLAG_SUSPEND_TX	BIT(0)
+#define ISCSI_CONN_FLAG_SUSPEND_RX	BIT(1)
+
 
 #define ISCSI_ITT_MASK			0x1fff
 #define ISCSI_TOTAL_CMDS_MAX		4096
@@ -199,8 +201,7 @@ struct iscsi_conn {
 	struct list_head	cmdqueue;	/* data-path cmd queue */
 	struct list_head	requeue;	/* tasks needing another run */
 	struct work_struct	xmitwork;	/* per-conn. xmit workqueue */
-	unsigned long		suspend_tx;	/* suspend Tx */
-	unsigned long		suspend_rx;	/* suspend Rx */
+	unsigned long		flags;		/* ISCSI_CONN_FLAGs */
 
 	/* negotiated params */
 	unsigned		max_recv_dlength; /* initiator_max_recv_dsl*/