diff options
| -rw-r--r-- | drivers/net/wireless/wl1251/tx.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/net/wireless/wl1251/tx.c b/drivers/net/wireless/wl1251/tx.c index 10112de55493..28121c590a2b 100644 --- a/drivers/net/wireless/wl1251/tx.c +++ b/drivers/net/wireless/wl1251/tx.c @@ -213,16 +213,30 @@ static int wl1251_tx_send_packet(struct wl1251 *wl, struct sk_buff *skb, wl1251_debug(DEBUG_TX, "skb offset %d", offset); /* check whether the current skb can be used */ - if (!skb_cloned(skb) && (skb_tailroom(skb) >= offset)) { - unsigned char *src = skb->data; + if (skb_cloned(skb) || (skb_tailroom(skb) < offset)) { + struct sk_buff *newskb = skb_copy_expand(skb, 0, 3, + GFP_KERNEL); + + if (unlikely(newskb == NULL)) { + wl1251_error("Can't allocate skb!"); + return -EINVAL; + } + + tx_hdr = (struct tx_double_buffer_desc *) newskb->data; + + dev_kfree_skb_any(skb); + wl->tx_frames[tx_hdr->id] = skb = newskb; - /* align the buffer on a 4-byte boundary */ + offset = (4 - (long)skb->data) & 0x03; + wl1251_debug(DEBUG_TX, "new skb offset %d", offset); + } + + /* align the buffer on a 4-byte boundary */ + if (offset) { + unsigned char *src = skb->data; skb_reserve(skb, offset); memmove(skb->data, src, skb->len); tx_hdr = (struct tx_double_buffer_desc *) skb->data; - } else { - wl1251_info("No handler, fixme!"); - return -EINVAL; } } |