sky2: keep track of receive alloc failures

When driver can't allocate receive buffer it drops incoming
packet. Keep a counter.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 887c1cea1b42..bde28ad9797d 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -2141,8 +2141,10 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do)
                 switch (le->opcode & ~HW_OWNER) {
                 case OP_RXSTAT:
                         skb = sky2_receive(dev, length, status);
-                        if (!skb)
+                        if (unlikely(!skb)) {
+                                sky2->net_stats.rx_dropped++;
                                 goto force_update;
+                        }
 
                         skb->protocol = eth_type_trans(skb, dev);
                         sky2->net_stats.rx_packets++;