net: enetc: extract enetc_int_vector_init/destroy() from enetc_alloc_msix()

Extract enetc_int_vector_init() and enetc_int_vector_destroy() from
enetc_alloc_msix() so that the code is more concise and readable.

Signed-off-by: Clark Wang <[email protected]>
Signed-off-by: Wei Fang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: wangxiaoningnxp

drivers/net/ethernet/freescale/enetc/enetc.c

@@ -2995,6 +2995,92 @@ int enetc_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
 }
 EXPORT_SYMBOL_GPL(enetc_ioctl);
 
+static int enetc_int_vector_init(struct enetc_ndev_priv *priv, int i,
+				 int v_tx_rings)
+{
+	struct enetc_int_vector *v;
+	struct enetc_bdr *bdr;
+	int j, err;
+
+	v = kzalloc(struct_size(v, tx_ring, v_tx_rings), GFP_KERNEL);
+	if (!v)
+		return -ENOMEM;
+
+	priv->int_vector[i] = v;
+	bdr = &v->rx_ring;
+	bdr->index = i;
+	bdr->ndev = priv->ndev;
+	bdr->dev = priv->dev;
+	bdr->bd_count = priv->rx_bd_count;
+	bdr->buffer_offset = ENETC_RXB_PAD;
+	priv->rx_ring[i] = bdr;
+
+	err = xdp_rxq_info_reg(&bdr->xdp.rxq, priv->ndev, i, 0);
+	if (err)
+		goto free_vector;
+
+	err = xdp_rxq_info_reg_mem_model(&bdr->xdp.rxq, MEM_TYPE_PAGE_SHARED,
+					 NULL);
+	if (err) {
+		xdp_rxq_info_unreg(&bdr->xdp.rxq);
+		goto free_vector;
+	}
+
+	/* init defaults for adaptive IC */
+	if (priv->ic_mode & ENETC_IC_RX_ADAPTIVE) {
+		v->rx_ictt = 0x1;
+		v->rx_dim_en = true;
+	}
+
+	INIT_WORK(&v->rx_dim.work, enetc_rx_dim_work);
+	netif_napi_add(priv->ndev, &v->napi, enetc_poll);
+	v->count_tx_rings = v_tx_rings;
+
+	for (j = 0; j < v_tx_rings; j++) {
+		int idx;
+
+		/* default tx ring mapping policy */
+		idx = priv->bdr_int_num * j + i;
+		__set_bit(idx, &v->tx_rings_map);
+		bdr = &v->tx_ring[j];
+		bdr->index = idx;
+		bdr->ndev = priv->ndev;
+		bdr->dev = priv->dev;
+		bdr->bd_count = priv->tx_bd_count;
+		priv->tx_ring[idx] = bdr;
+	}
+
+	return 0;
+
+free_vector:
+	priv->rx_ring[i] = NULL;
+	priv->int_vector[i] = NULL;
+	kfree(v);
+
+	return err;
+}
+
+static void enetc_int_vector_destroy(struct enetc_ndev_priv *priv, int i)
+{
+	struct enetc_int_vector *v = priv->int_vector[i];
+	struct enetc_bdr *rx_ring = &v->rx_ring;
+	int j, tx_ring_index;
+
+	xdp_rxq_info_unreg_mem_model(&rx_ring->xdp.rxq);
+	xdp_rxq_info_unreg(&rx_ring->xdp.rxq);
+	netif_napi_del(&v->napi);
+	cancel_work_sync(&v->rx_dim.work);
+
+	for (j = 0; j < v->count_tx_rings; j++) {
+		tx_ring_index = priv->bdr_int_num * j + i;
+		priv->tx_ring[tx_ring_index] = NULL;
+	}
+
+	priv->rx_ring[i] = NULL;
+	priv->int_vector[i] = NULL;
+	kfree(v);
+}
+
 int enetc_alloc_msix(struct enetc_ndev_priv *priv)
 {
 	struct pci_dev *pdev = priv->si->pdev;
@@ -3017,62 +3103,9 @@ int enetc_alloc_msix(struct enetc_ndev_priv *priv)
 	v_tx_rings = priv->num_tx_rings / priv->bdr_int_num;
 
 	for (i = 0; i < priv->bdr_int_num; i++) {
-		struct enetc_int_vector *v;
-		struct enetc_bdr *bdr;
-		int j;
-
-		v = kzalloc(struct_size(v, tx_ring, v_tx_rings), GFP_KERNEL);
-		if (!v) {
-			err = -ENOMEM;
-			goto fail;
-		}
-
-		priv->int_vector[i] = v;
-
-		bdr = &v->rx_ring;
-		bdr->index = i;
-		bdr->ndev = priv->ndev;
-		bdr->dev = priv->dev;
-		bdr->bd_count = priv->rx_bd_count;
-		bdr->buffer_offset = ENETC_RXB_PAD;
-		priv->rx_ring[i] = bdr;
-
-		err = xdp_rxq_info_reg(&bdr->xdp.rxq, priv->ndev, i, 0);
-		if (err) {
-			kfree(v);
-			goto fail;
-		}
-
-		err = xdp_rxq_info_reg_mem_model(&bdr->xdp.rxq,
-						 MEM_TYPE_PAGE_SHARED, NULL);
-		if (err) {
-			xdp_rxq_info_unreg(&bdr->xdp.rxq);
-			kfree(v);
+		err = enetc_int_vector_init(priv, i, v_tx_rings);
+		if (err)
 			goto fail;
-		}
-
-		/* init defaults for adaptive IC */
-		if (priv->ic_mode & ENETC_IC_RX_ADAPTIVE) {
-			v->rx_ictt = 0x1;
-			v->rx_dim_en = true;
-		}
-		INIT_WORK(&v->rx_dim.work, enetc_rx_dim_work);
-		netif_napi_add(priv->ndev, &v->napi, enetc_poll);
-		v->count_tx_rings = v_tx_rings;
-
-		for (j = 0; j < v_tx_rings; j++) {
-			int idx;
-
-			/* default tx ring mapping policy */
-			idx = priv->bdr_int_num * j + i;
-			__set_bit(idx, &v->tx_rings_map);
-			bdr = &v->tx_ring[j];
-			bdr->index = idx;
-			bdr->ndev = priv->ndev;
-			bdr->dev = priv->dev;
-			bdr->bd_count = priv->tx_bd_count;
-			priv->tx_ring[idx] = bdr;
-		}
 	}
 
 	num_stack_tx_queues = enetc_num_stack_tx_queues(priv);
@@ -3092,16 +3125,8 @@ int enetc_alloc_msix(struct enetc_ndev_priv *priv)
 	return 0;
 
 fail:
-	while (i--) {
-		struct enetc_int_vector *v = priv->int_vector[i];
-		struct enetc_bdr *rx_ring = &v->rx_ring;
-
-		xdp_rxq_info_unreg_mem_model(&rx_ring->xdp.rxq);
-		xdp_rxq_info_unreg(&rx_ring->xdp.rxq);
-		netif_napi_del(&v->napi);
-		cancel_work_sync(&v->rx_dim.work);
-		kfree(v);
-	}
+	while (i--)
+		enetc_int_vector_destroy(priv, i);
 
 	pci_free_irq_vectors(pdev);
 
@@ -3113,26 +3138,8 @@ void enetc_free_msix(struct enetc_ndev_priv *priv)
 {
 	int i;
 
-	for (i = 0; i < priv->bdr_int_num; i++) {
-		struct enetc_int_vector *v = priv->int_vector[i];
-		struct enetc_bdr *rx_ring = &v->rx_ring;
-
-		xdp_rxq_info_unreg_mem_model(&rx_ring->xdp.rxq);
-		xdp_rxq_info_unreg(&rx_ring->xdp.rxq);
-		netif_napi_del(&v->napi);
-		cancel_work_sync(&v->rx_dim.work);
-	}
-
-	for (i = 0; i < priv->num_rx_rings; i++)
-		priv->rx_ring[i] = NULL;
-
-	for (i = 0; i < priv->num_tx_rings; i++)
-		priv->tx_ring[i] = NULL;
-
-	for (i = 0; i < priv->bdr_int_num; i++) {
-		kfree(priv->int_vector[i]);
-		priv->int_vector[i] = NULL;
-	}
+	for (i = 0; i < priv->bdr_int_num; i++)
+		enetc_int_vector_destroy(priv, i);
 
 	/* disable all MSIX for this device */
 	pci_free_irq_vectors(priv->si->pdev);