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tsnep: Fix NAPI polling with budget 0 

According to the NAPI documentation networking/napi.rst, Rx specific
APIs like page pool and XDP cannot be used at all when budget is 0.
skb Tx processing should happen regardless of the budget.

Stop NAPI polling after Tx processing and skip Rx processing if budget
is 0.

Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gerhard Engleder 2023-09-15 23:01:26 +02:00 committed by David S. Miller
parent a7f991953d
commit 46589db381
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/engleder/tsnep_main.c
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@ -1734,6 +1734,10 @@ static int tsnep_poll(struct napi_struct *napi, int budget)
if (queue->tx)
complete = tsnep_tx_poll(queue->tx, budget);
/* handle case where we are called by netpoll with a budget of 0 */
if (unlikely(budget <= 0))
return budget;
if (queue->rx) {
done = queue->rx->xsk_pool ?
tsnep_rx_poll_zc(queue->rx, napi, budget) :