net: dnet: fix dnet_poll()

A NAPI poll() handler is supposed to return exactly the budget when/if
napi_complete() has not been called.

It is also supposed to return number of frames that were received, so
that netdev_budget can have a meaning.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/dnet.c b/drivers/net/ethernet/dnet.c
index a379c3e..13d00a3 100644 (file)
--- a/drivers/net/ethernet/dnet.c
+++ b/drivers/net/ethernet/dnet.c
@@ -398,13 +398,8 @@ static int dnet_poll(struct napi_struct *napi, int budget)
                 * break out of while loop if there are no more
                 * packets waiting
                 */
-               if (!(dnet_readl(bp, RX_FIFO_WCNT) >> 16)) {
-                       napi_complete(napi);
-                       int_enable = dnet_readl(bp, INTR_ENB);
-                       int_enable |= DNET_INTR_SRC_RX_CMDFIFOAF;
-                       dnet_writel(bp, int_enable, INTR_ENB);
-                       return 0;
-               }
+               if (!(dnet_readl(bp, RX_FIFO_WCNT) >> 16))
+                       break;
 
                cmd_word = dnet_readl(bp, RX_LEN_FIFO);
                pkt_len = cmd_word & 0xFFFF;
@@ -433,20 +428,17 @@ static int dnet_poll(struct napi_struct *napi, int budget)
                               "size %u.\n", dev->name, pkt_len);
        }
 
-       budget -= npackets;
-
        if (npackets < budget) {
                /* We processed all packets available.  Tell NAPI it can
-                * stop polling then re-enable rx interrupts */
+                * stop polling then re-enable rx interrupts.
+                */
                napi_complete(napi);
                int_enable = dnet_readl(bp, INTR_ENB);
                int_enable |= DNET_INTR_SRC_RX_CMDFIFOAF;
                dnet_writel(bp, int_enable, INTR_ENB);
-               return 0;
        }
 
-       /* There are still packets waiting */
-       return 1;
+       return npackets;
 }
 
 static irqreturn_t dnet_interrupt(int irq, void *dev_id)