---

yaml
---
r: 279170
b: refs/heads/master
c: 86d8c07
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fa0f5aa74316c636427ac92dad0bc5714c34ca17
+refs/heads/master: 86d8c07ff2448eb4e860e50f34ef6ee78e45c40c

trunk/drivers/net/ethernet/ti/davinci_emac.c

@@ -115,6 +115,7 @@ static const char emac_version_string[] = "TI DaVinci EMAC Linux v6.1";
 #define EMAC_DEF_TX_CH			(0) /* Default 0th channel */
 #define EMAC_DEF_RX_CH			(0) /* Default 0th channel */
 #define EMAC_DEF_RX_NUM_DESC		(128)
+#define EMAC_DEF_TX_NUM_DESC		(128)
 #define EMAC_DEF_MAX_TX_CH		(1) /* Max TX channels configured */
 #define EMAC_DEF_MAX_RX_CH		(1) /* Max RX channels configured */
 #define EMAC_POLL_WEIGHT		(64) /* Default NAPI poll weight */
@@ -336,6 +337,7 @@ struct emac_priv {
 	u32 mac_hash2;
 	u32 multicast_hash_cnt[EMAC_NUM_MULTICAST_BITS];
 	u32 rx_addr_type;
+	atomic_t cur_tx;
 	const char *phy_id;
 	struct phy_device *phydev;
 	spinlock_t lock;
@@ -1044,6 +1046,9 @@ static void emac_tx_handler(void *token, int len, int status)
 {
 	struct sk_buff		*skb = token;
 	struct net_device	*ndev = skb->dev;
+	struct emac_priv	*priv = netdev_priv(ndev);
+
+	atomic_dec(&priv->cur_tx);
 
 	if (unlikely(netif_queue_stopped(ndev)))
 		netif_start_queue(ndev);
@@ -1092,6 +1097,9 @@ static int emac_dev_xmit(struct sk_buff *skb, struct net_device *ndev)
 		goto fail_tx;
 	}
 
+	if (atomic_inc_return(&priv->cur_tx) >= EMAC_DEF_TX_NUM_DESC)
+		netif_stop_queue(ndev);
+
 	return NETDEV_TX_OK;
 
 fail_tx: