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Commit b1379d9a authored by hayeswang's avatar hayeswang Committed by David S. Miller
Browse files

r8152: adjust tx_bottom function 



Split some parts of code into another function to simplify
tx_bottom(). Use while loop to replace the goto loop.

Signed-off-by: default avatarHayes Wang <hayeswang@realtek.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 43a4478d

drivers/net/usb/r8152.c

+68 −66
Original line number Diff line number Diff line
@@ -1131,6 +1131,51 @@ r8152_tx_csum(struct r8152 *tp, struct tx_desc *desc, struct sk_buff *skb) 
	}

}



static int r8152_tx_agg_fill(struct r8152 *tp, struct tx_agg *agg)

{

	u32 remain;

	u8 *tx_data;



	tx_data = agg->head;

	agg->skb_num = agg->skb_len = 0;

	remain = rx_buf_sz - sizeof(struct tx_desc);



	while (remain >= ETH_ZLEN) {

		struct tx_desc *tx_desc;

		struct sk_buff *skb;

		unsigned int len;



		skb = skb_dequeue(&tp->tx_queue);

		if (!skb)

			break;



		len = skb->len;

		if (remain < len) {

			skb_queue_head(&tp->tx_queue, skb);

			break;

		}



		tx_desc = (struct tx_desc *)tx_data;

		tx_data += sizeof(*tx_desc);



		r8152_tx_csum(tp, tx_desc, skb);

		memcpy(tx_data, skb->data, len);

		agg->skb_num++;

		agg->skb_len += len;

		dev_kfree_skb_any(skb);



		tx_data = tx_agg_align(tx_data + len);

		remain = rx_buf_sz - sizeof(*tx_desc) -

			 (u32)((void *)tx_data - agg->head);

	}



	usb_fill_bulk_urb(agg->urb, tp->udev, usb_sndbulkpipe(tp->udev, 2),

			  agg->head, (int)(tx_data - (u8 *)agg->head),

			  (usb_complete_t)write_bulk_callback, agg);



	return usb_submit_urb(agg->urb, GFP_ATOMIC);

}



static void rx_bottom(struct r8152 *tp)

{

	unsigned long flags;
@@ -1204,69 +1249,27 @@ static void rx_bottom(struct r8152 *tp) 


static void tx_bottom(struct r8152 *tp)

{

	struct net_device_stats *stats;

	struct net_device *netdev;

	struct tx_agg *agg;

	unsigned long flags;

	u32 remain, total;

	u8 *tx_data;

	int res;



	netdev = tp->netdev;

	do {

		struct tx_agg *agg;



next_agg:

	agg = NULL;

		if (skb_queue_empty(&tp->tx_queue))

		return;

			break;



		agg = r8152_get_tx_agg(tp);

		if (!agg)

		return;



	tx_data = agg->head;

	agg->skb_num = agg->skb_len = 0;

	remain = rx_buf_sz - sizeof(struct tx_desc);

	total = 0;



	while (remain >= ETH_ZLEN) {

		struct tx_desc *tx_desc;

		struct sk_buff *skb;

		unsigned int len;



		skb = skb_dequeue(&tp->tx_queue);

		if (!skb)

			break;



		len = skb->len;

		if (remain < len) {

			skb_queue_head(&tp->tx_queue, skb);

			break;

		}



		tx_data = tx_agg_align(tx_data);

		tx_desc = (struct tx_desc *)tx_data;

		tx_data += sizeof(*tx_desc);



		r8152_tx_csum(tp, tx_desc, skb);

		memcpy(tx_data, skb->data, len);

		agg->skb_num++;

		agg->skb_len += len;

		dev_kfree_skb_any(skb);



		tx_data += len;

		remain = rx_buf_sz - sizeof(*tx_desc) -

			 (u32)(tx_agg_align(tx_data) - agg->head);

	}



	usb_fill_bulk_urb(agg->urb, tp->udev, usb_sndbulkpipe(tp->udev, 2),

			  agg->head, (int)(tx_data - (u8 *)agg->head),

			  (usb_complete_t)write_bulk_callback, agg);

	res = usb_submit_urb(agg->urb, GFP_ATOMIC);

		res = r8152_tx_agg_fill(tp, agg);

		if (res) {

			struct net_device_stats *stats;

			struct net_device *netdev;

			unsigned long flags;



			netdev = tp->netdev;

			stats = rtl8152_get_stats(netdev);



	if (res) {

		/* Can we get/handle EPIPE here? */

			if (res == -ENODEV) {

				netif_device_detach(netdev);

			} else {
@@ -1277,9 +1280,8 @@ static void tx_bottom(struct r8152 *tp) 
				list_add_tail(&agg->list, &tp->tx_free);

				spin_unlock_irqrestore(&tp->tx_lock, flags);

			}

		return;

		}

	goto next_agg;

	} while (res == 0);

}



static void bottom_half(unsigned long data)