Commit 12d80ac4 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller

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: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0c818594
......@@ -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)
......
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