1 files changed, 38 insertions, 40 deletions

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index e5ffb2ccb67d..b93d4404d975 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -225,6 +225,11 @@ static inline unsigned int xgbe_tx_avail_desc(struct xgbe_ring *ring)
 	return (ring->rdesc_count - (ring->cur - ring->dirty));
 }
 
+static inline unsigned int xgbe_rx_dirty_desc(struct xgbe_ring *ring)
+{
+	return (ring->cur - ring->dirty);
+}
+
 static int xgbe_maybe_stop_tx_queue(struct xgbe_channel *channel,
 				    struct xgbe_ring *ring, unsigned int count)
 {
@@ -337,12 +342,13 @@ static irqreturn_t xgbe_isr(int irq, void *data)
 		dma_ch_isr = XGMAC_DMA_IOREAD(channel, DMA_CH_SR);
 		DBGPR("  DMA_CH%u_ISR = %08x\n", i, dma_ch_isr);
 
-		/* If we get a TI or RI interrupt that means per channel DMA
-		 * interrupts are not enabled, so we use the private data napi
-		 * structure, not the per channel napi structure
+		/* The TI or RI interrupt bits may still be set even if using
+		 * per channel DMA interrupts. Check to be sure those are not
+		 * enabled before using the private data napi structure.
 		 */
-		if (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, TI) ||
-		    XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RI)) {
+		if (!pdata->per_channel_irq &&
+		    (XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, TI) ||
+		     XGMAC_GET_BITS(dma_ch_isr, DMA_CH_SR, RI))) {
 			if (napi_schedule_prep(&pdata->napi)) {
 				/* Disable Tx and Rx interrupts */
 				xgbe_disable_rx_tx_ints(pdata);
@@ -410,17 +416,13 @@ static enum hrtimer_restart xgbe_tx_timer(struct hrtimer *timer)
 	struct xgbe_channel *channel = container_of(timer,
 						    struct xgbe_channel,
 						    tx_timer);
-	struct xgbe_ring *ring = channel->tx_ring;
 	struct xgbe_prv_data *pdata = channel->pdata;
 	struct napi_struct *napi;
-	unsigned long flags;
 
 	DBGPR("-->xgbe_tx_timer\n");
 
 	napi = (pdata->per_channel_irq) ? &channel->napi : &pdata->napi;
 
-	spin_lock_irqsave(&ring->lock, flags);
-
 	if (napi_schedule_prep(napi)) {
 		/* Disable Tx and Rx interrupts */
 		if (pdata->per_channel_irq)
@@ -434,8 +436,6 @@ static enum hrtimer_restart xgbe_tx_timer(struct hrtimer *timer)
 
 	channel->tx_timer_active = 0;
 
-	spin_unlock_irqrestore(&ring->lock, flags);
-
 	DBGPR("<--xgbe_tx_timer\n");
 
 	return HRTIMER_NORESTART;
@@ -694,7 +694,7 @@ static void xgbe_adjust_link(struct net_device *netdev)
 	struct phy_device *phydev = pdata->phydev;
 	int new_state = 0;
 
-	if (phydev == NULL)
+	if (!phydev)
 		return;
 
 	if (phydev->link) {
@@ -929,7 +929,7 @@ static void xgbe_stop(struct xgbe_prv_data *pdata)
 	DBGPR("<--xgbe_stop\n");
 }
 
-static void xgbe_restart_dev(struct xgbe_prv_data *pdata, unsigned int reset)
+static void xgbe_restart_dev(struct xgbe_prv_data *pdata)
 {
 	struct xgbe_channel *channel;
 	struct xgbe_hw_if *hw_if = &pdata->hw_if;
@@ -952,9 +952,8 @@ static void xgbe_restart_dev(struct xgbe_prv_data *pdata, unsigned int reset)
 	xgbe_free_tx_data(pdata);
 	xgbe_free_rx_data(pdata);
 
-	/* Issue software reset to device if requested */
-	if (reset)
-		hw_if->exit(pdata);
+	/* Issue software reset to device */
+	hw_if->exit(pdata);
 
 	xgbe_start(pdata);
 
@@ -969,7 +968,7 @@ static void xgbe_restart(struct work_struct *work)
 
 	rtnl_lock();
 
-	xgbe_restart_dev(pdata, 1);
+	xgbe_restart_dev(pdata);
 
 	rtnl_unlock();
 }
@@ -1167,8 +1166,8 @@ static void xgbe_prep_tx_tstamp(struct xgbe_prv_data *pdata,
 
 static void xgbe_prep_vlan(struct sk_buff *skb, struct xgbe_packet_data *packet)
 {
-	if (vlan_tx_tag_present(skb))
-		packet->vlan_ctag = vlan_tx_tag_get(skb);
+	if (skb_vlan_tag_present(skb))
+		packet->vlan_ctag = skb_vlan_tag_get(skb);
 }
 
 static int xgbe_prep_tso(struct sk_buff *skb, struct xgbe_packet_data *packet)
@@ -1249,9 +1248,9 @@ static void xgbe_packet_info(struct xgbe_prv_data *pdata,
 		XGMAC_SET_BITS(packet->attributes, TX_PACKET_ATTRIBUTES,
 			       CSUM_ENABLE, 1);
 
-	if (vlan_tx_tag_present(skb)) {
+	if (skb_vlan_tag_present(skb)) {
 		/* VLAN requires an extra descriptor if tag is different */
-		if (vlan_tx_tag_get(skb) != ring->tx.cur_vlan_ctag)
+		if (skb_vlan_tag_get(skb) != ring->tx.cur_vlan_ctag)
 			/* We can share with the TSO context descriptor */
 			if (!context_desc) {
 				context_desc = 1;
@@ -1448,7 +1447,6 @@ static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
 	struct xgbe_ring *ring;
 	struct xgbe_packet_data *packet;
 	struct netdev_queue *txq;
-	unsigned long flags;
 	int ret;
 
 	DBGPR("-->xgbe_xmit: skb->len = %d\n", skb->len);
@@ -1460,8 +1458,6 @@ static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
 
 	ret = NETDEV_TX_OK;
 
-	spin_lock_irqsave(&ring->lock, flags);
-
 	if (skb->len == 0) {
 		netdev_err(netdev, "empty skb received from stack\n");
 		dev_kfree_skb_any(skb);
@@ -1508,10 +1504,6 @@ static int xgbe_xmit(struct sk_buff *skb, struct net_device *netdev)
 	ret = NETDEV_TX_OK;
 
 tx_netdev_return:
-	spin_unlock_irqrestore(&ring->lock, flags);
-
-	DBGPR("<--xgbe_xmit\n");
-
 	return ret;
 }
 
@@ -1589,7 +1581,7 @@ static int xgbe_change_mtu(struct net_device *netdev, int mtu)
 	pdata->rx_buf_size = ret;
 	netdev->mtu = mtu;
 
-	xgbe_restart_dev(pdata, 0);
+	xgbe_restart_dev(pdata);
 
 	DBGPR("<--xgbe_change_mtu\n");
 
@@ -1778,15 +1770,28 @@ struct net_device_ops *xgbe_get_netdev_ops(void)
 static void xgbe_rx_refresh(struct xgbe_channel *channel)
 {
 	struct xgbe_prv_data *pdata = channel->pdata;
+	struct xgbe_hw_if *hw_if = &pdata->hw_if;
 	struct xgbe_desc_if *desc_if = &pdata->desc_if;
 	struct xgbe_ring *ring = channel->rx_ring;
 	struct xgbe_ring_data *rdata;
 
-	desc_if->realloc_rx_buffer(channel);
+	while (ring->dirty != ring->cur) {
+		rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
+
+		/* Reset rdata values */
+		desc_if->unmap_rdata(pdata, rdata);
+
+		if (desc_if->map_rx_buffer(pdata, ring, rdata))
+			break;
+
+		hw_if->rx_desc_reset(rdata);
+
+		ring->dirty++;
+	}
 
 	/* Update the Rx Tail Pointer Register with address of
 	 * the last cleaned entry */
-	rdata = XGBE_GET_DESC_DATA(ring, ring->rx.realloc_index - 1);
+	rdata = XGBE_GET_DESC_DATA(ring, ring->dirty - 1);
 	XGMAC_DMA_IOWRITE(channel, DMA_CH_RDTR_LO,
 			  lower_32_bits(rdata->rdesc_dma));
 }
@@ -1826,7 +1831,6 @@ static int xgbe_tx_poll(struct xgbe_channel *channel)
 	struct xgbe_ring_desc *rdesc;
 	struct net_device *netdev = pdata->netdev;
 	struct netdev_queue *txq;
-	unsigned long flags;
 	int processed = 0;
 	unsigned int tx_packets = 0, tx_bytes = 0;
 
@@ -1838,8 +1842,6 @@ static int xgbe_tx_poll(struct xgbe_channel *channel)
 
 	txq = netdev_get_tx_queue(netdev, channel->queue_index);
 
-	spin_lock_irqsave(&ring->lock, flags);
-
 	while ((processed < XGBE_TX_DESC_MAX_PROC) &&
 	       (ring->dirty != ring->cur)) {
 		rdata = XGBE_GET_DESC_DATA(ring, ring->dirty);
@@ -1870,7 +1872,7 @@ static int xgbe_tx_poll(struct xgbe_channel *channel)
 	}
 
 	if (!processed)
-		goto unlock;
+		return 0;
 
 	netdev_tx_completed_queue(txq, tx_packets, tx_bytes);
 
@@ -1882,9 +1884,6 @@ static int xgbe_tx_poll(struct xgbe_channel *channel)
 
 	DBGPR("<--xgbe_tx_poll: processed=%d\n", processed);
 
-unlock:
-	spin_unlock_irqrestore(&ring->lock, flags);
-
 	return processed;
 }
 
@@ -1936,7 +1935,7 @@ static int xgbe_rx_poll(struct xgbe_channel *channel, int budget)
 read_again:
 		rdata = XGBE_GET_DESC_DATA(ring, ring->cur);
 
-		if (ring->dirty > (XGBE_RX_DESC_CNT >> 3))
+		if (xgbe_rx_dirty_desc(ring) > (XGBE_RX_DESC_CNT >> 3))
 			xgbe_rx_refresh(channel);
 
 		if (hw_if->dev_read(channel))
@@ -1944,7 +1943,6 @@ read_again:
 
 		received++;
 		ring->cur++;
-		ring->dirty++;
 
 		incomplete = XGMAC_GET_BITS(packet->attributes,
 					    RX_PACKET_ATTRIBUTES,