forcedeth: Account for consumed budget in napi poll

Repeated calls to nv_rx_process in napi poll routine do not take
portion of budget that has been consumed in previous calls.  Fix by
subtracting the number of packets processed.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index f9e1dd48ac56..e282d0ae6a3d 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -3564,14 +3564,15 @@ static int nv_napi_poll(struct napi_struct *napi, int budget)
                         tx_work += nv_tx_done(dev, np->tx_ring_size);
                         spin_unlock_irqrestore(&np->lock, flags);
 
-                        rx_count = nv_rx_process(dev, budget);
+                        rx_count = nv_rx_process(dev, budget - rx_work);
                         retcode = nv_alloc_rx(dev);
                 } else {
                         spin_lock_irqsave(&np->lock, flags);
                         tx_work += nv_tx_done_optimized(dev, np->tx_ring_size);
                         spin_unlock_irqrestore(&np->lock, flags);
 
-                        rx_count = nv_rx_process_optimized(dev, budget);
+                        rx_count = nv_rx_process_optimized(dev,
+                            budget - rx_work);
                         retcode = nv_alloc_rx_optimized(dev);
                 }
         } while (retcode == 0 &&