1 files changed, 6 insertions, 33 deletions

diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c
index fbe9db46a41a..f0065d40eb24 100644
--- a/drivers/net/can/usb/gs_usb.c
+++ b/drivers/net/can/usb/gs_usb.c
@@ -314,8 +314,6 @@ struct gs_can {
 
 	struct usb_anchor tx_submitted;
 	atomic_t active_tx_urbs;
-	void *rxbuf[GS_MAX_RX_URBS];
-	dma_addr_t rxbuf_dma[GS_MAX_RX_URBS];
 };
 
 /* usb interface struct */
@@ -710,9 +708,6 @@ static void gs_usb_xmit_callback(struct urb *urb)
 
 	if (urb->status)
 		netdev_info(netdev, "usb xmit fail %u\n", txc->echo_id);
-
-	usb_free_coherent(urb->dev, urb->transfer_buffer_length,
-			  urb->transfer_buffer, urb->transfer_dma);
 }
 
 static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb,
@@ -741,8 +736,7 @@ static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb,
 	if (!urb)
 		goto nomem_urb;
 
-	hf = usb_alloc_coherent(dev->udev, dev->hf_size_tx, GFP_ATOMIC,
-				&urb->transfer_dma);
+	hf = kmalloc(dev->hf_size_tx, GFP_ATOMIC);
 	if (!hf) {
 		netdev_err(netdev, "No memory left for USB buffer\n");
 		goto nomem_hf;
@@ -786,7 +780,7 @@ static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb,
 			  hf, dev->hf_size_tx,
 			  gs_usb_xmit_callback, txc);
 
-	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+	urb->transfer_flags |= URB_FREE_BUFFER;
 	usb_anchor_urb(urb, &dev->tx_submitted);
 
 	can_put_echo_skb(skb, netdev, idx, 0);
@@ -801,8 +795,6 @@ static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb,
 		gs_free_tx_context(txc);
 
 		usb_unanchor_urb(urb);
-		usb_free_coherent(dev->udev, urb->transfer_buffer_length,
-				  urb->transfer_buffer, urb->transfer_dma);
 
 		if (rc == -ENODEV) {
 			netif_device_detach(netdev);
@@ -822,8 +814,7 @@ static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb,
 	return NETDEV_TX_OK;
 
  badidx:
-	usb_free_coherent(dev->udev, urb->transfer_buffer_length,
-			  urb->transfer_buffer, urb->transfer_dma);
+	kfree(hf);
  nomem_hf:
 	usb_free_urb(urb);
 
@@ -869,7 +860,6 @@ static int gs_can_open(struct net_device *netdev)
 		for (i = 0; i < GS_MAX_RX_URBS; i++) {
 			struct urb *urb;
 			u8 *buf;
-			dma_addr_t buf_dma;
 
 			/* alloc rx urb */
 			urb = usb_alloc_urb(0, GFP_KERNEL);
@@ -877,10 +867,8 @@ static int gs_can_open(struct net_device *netdev)
 				return -ENOMEM;
 
 			/* alloc rx buffer */
-			buf = usb_alloc_coherent(dev->udev,
-						 dev->parent->hf_size_rx,
-						 GFP_KERNEL,
-						 &buf_dma);
+			buf = kmalloc(dev->parent->hf_size_rx,
+				      GFP_KERNEL);
 			if (!buf) {
 				netdev_err(netdev,
 					   "No memory left for USB buffer\n");
@@ -888,8 +876,6 @@ static int gs_can_open(struct net_device *netdev)
 				return -ENOMEM;
 			}
 
-			urb->transfer_dma = buf_dma;
-
 			/* fill, anchor, and submit rx urb */
 			usb_fill_bulk_urb(urb,
 					  dev->udev,
@@ -898,7 +884,7 @@ static int gs_can_open(struct net_device *netdev)
 					  buf,
 					  dev->parent->hf_size_rx,
 					  gs_usb_receive_bulk_callback, parent);
-			urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+			urb->transfer_flags |= URB_FREE_BUFFER;
 
 			usb_anchor_urb(urb, &parent->rx_submitted);
 
@@ -911,17 +897,10 @@ static int gs_can_open(struct net_device *netdev)
 					   "usb_submit failed (err=%d)\n", rc);
 
 				usb_unanchor_urb(urb);
-				usb_free_coherent(dev->udev,
-						  sizeof(struct gs_host_frame),
-						  buf,
-						  buf_dma);
 				usb_free_urb(urb);
 				break;
 			}
 
-			dev->rxbuf[i] = buf;
-			dev->rxbuf_dma[i] = buf_dma;
-
 			/* Drop reference,
 			 * USB core will take care of freeing it
 			 */
@@ -980,7 +959,6 @@ static int gs_can_close(struct net_device *netdev)
 	int rc;
 	struct gs_can *dev = netdev_priv(netdev);
 	struct gs_usb *parent = dev->parent;
-	unsigned int i;
 
 	netif_stop_queue(netdev);
 
@@ -992,11 +970,6 @@ static int gs_can_close(struct net_device *netdev)
 	parent->active_channels--;
 	if (!parent->active_channels) {
 		usb_kill_anchored_urbs(&parent->rx_submitted);
-		for (i = 0; i < GS_MAX_RX_URBS; i++)
-			usb_free_coherent(dev->udev,
-					  sizeof(struct gs_host_frame),
-					  dev->rxbuf[i],
-					  dev->rxbuf_dma[i]);
 	}
 
 	/* Stop sending URBs */