rt2x00: Centralize allocation of RX skbs.

In preparation of replacing the statically allocated DMA buffers with
dynamically mapped skbs, centralize the allocation of RX skbs to rt2x00queue.c
and let rt2x00pci already use them.

Signed-off-by: Gertjan van Wingerde <gwingerde@kpnplanet.nl>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 49 insertions, 28 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00pci.c b/drivers/net/wireless/rt2x00/rt2x00pci.c
index d6138389a5d0..e7e3a459b66a 100644
--- a/drivers/net/wireless/rt2x00/rt2x00pci.c
+++ b/drivers/net/wireless/rt2x00/rt2x00pci.c
@@ -74,13 +74,59 @@ EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);
 /*
  * TX/RX data handlers.
  */
+static void rt2x00pci_rxdone_entry(struct rt2x00_dev *rt2x00dev,
+				   struct queue_entry *entry)
+{
+	struct sk_buff *skb;
+	struct skb_frame_desc *skbdesc;
+	struct rxdone_entry_desc rxdesc;
+	struct queue_entry_priv_pci *entry_priv = entry->priv_data;
+
+	/*
+	 * Allocate a new sk_buffer. If no new buffer available, drop the
+	 * received frame and reuse the existing buffer.
+	 */
+	skb = rt2x00queue_alloc_skb(entry->queue);
+	if (!skb)
+		return;
+
+	/*
+	 * Extract the RXD details.
+	 */
+	memset(&rxdesc, 0, sizeof(rxdesc));
+	rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
+
+	/*
+	 * Copy the received data to the entries' skb.
+	 */
+	memcpy(entry->skb->data, entry_priv->data, rxdesc.size);
+	skb_trim(entry->skb, rxdesc.size);
+
+	/*
+	 * Fill in skb descriptor
+	 */
+	skbdesc = get_skb_frame_desc(entry->skb);
+	memset(skbdesc, 0, sizeof(*skbdesc));
+	skbdesc->desc = entry_priv->desc;
+	skbdesc->desc_len = entry->queue->desc_size;
+	skbdesc->entry = entry;
+
+	/*
+	 * Send the frame to rt2x00lib for further processing.
+	 */
+	rt2x00lib_rxdone(entry, &rxdesc);
+
+	/*
+	 * Replace the entries' skb with the newly allocated one.
+	 */
+	entry->skb = skb;
+}
+
 void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
 {
 	struct data_queue *queue = rt2x00dev->rx;
 	struct queue_entry *entry;
 	struct queue_entry_priv_pci *entry_priv;
-	struct skb_frame_desc *skbdesc;
-	struct rxdone_entry_desc rxdesc;
 	u32 word;
 
 	while (1) {
@@ -91,32 +137,7 @@ void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
 		if (rt2x00_get_field32(word, RXD_ENTRY_OWNER_NIC))
 			break;
 
-		memset(&rxdesc, 0, sizeof(rxdesc));
-		rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
-
-		/*
-		 * Allocate the sk_buffer and copy all data into it.
-		 */
-		entry->skb = rt2x00queue_alloc_rxskb(queue);
-		if (!entry->skb)
-			return;
-
-		memcpy(entry->skb->data, entry_priv->data, rxdesc.size);
-		skb_trim(entry->skb, rxdesc.size);
-
-		/*
-		 * Fill in skb descriptor
-		 */
-		skbdesc = get_skb_frame_desc(entry->skb);
-		memset(skbdesc, 0, sizeof(*skbdesc));
-		skbdesc->desc = entry_priv->desc;
-		skbdesc->desc_len = queue->desc_size;
-		skbdesc->entry = entry;
-
-		/*
-		 * Send the frame to rt2x00lib for further processing.
-		 */
-		rt2x00lib_rxdone(entry, &rxdesc);
+		rt2x00pci_rxdone_entry(rt2x00dev, entry);
 
 		if (test_bit(DEVICE_ENABLED_RADIO, &queue->rt2x00dev->flags)) {
 			rt2x00_set_field32(&word, RXD_ENTRY_OWNER_NIC, 1);