[PATCH v2 net] gianfar : Do right check on num_txbdfree

[Rini van Zetten <rini@arvoo.nl>]

This patch fixes a wrong check on num_txbdfree. It could lead to num_txbdfree become nagative.
Result was that the gianfar stops sending data.

Changes from first version :
- removed a space between parens (David Millers comment)
- full email address in signed off line


Signed-off-by: Rini van Zetten <rini@arvoo.nl>
---
  drivers/net/gianfar.c |    2 +-
  1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index 7ef1ffd..2dc3bd3 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -1284,9 +1284,8 @@ static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
      spin_lock_irqsave(&priv->txlock, flags);

      /* check if there is space to queue this packet */
-    if (nr_frags > priv->num_txbdfree) {
+    if ((nr_frags+1) > priv->num_txbdfree) {
          /* no space, stop the queue */
          netif_stop_queue(dev);
          dev->stats.tx_fifo_errors++;
          spin_unlock_irqrestore(&priv->txlock, flags);
--