diff options
Diffstat (limited to 'drivers/net/ethernet/freescale/fec_main.c')
| -rw-r--r-- | drivers/net/ethernet/freescale/fec_main.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 073d61619336..66b5cbdb43b9 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -1372,7 +1372,7 @@ fec_enet_hwtstamp(struct fec_enet_private *fep, unsigned ts, } static void -fec_enet_tx_queue(struct net_device *ndev, u16 queue_id) +fec_enet_tx_queue(struct net_device *ndev, u16 queue_id, int budget) { struct fec_enet_private *fep; struct xdp_frame *xdpf; @@ -1416,6 +1416,14 @@ fec_enet_tx_queue(struct net_device *ndev, u16 queue_id) if (!skb) goto tx_buf_done; } else { + /* Tx processing cannot call any XDP (or page pool) APIs if + * the "budget" is 0. Because NAPI is called with budget of + * 0 (such as netpoll) indicates we may be in an IRQ context, + * however, we can't use the page pool from IRQ context. + */ + if (unlikely(!budget)) + break; + xdpf = txq->tx_buf[index].xdp; if (bdp->cbd_bufaddr) dma_unmap_single(&fep->pdev->dev, @@ -1508,14 +1516,14 @@ tx_buf_done: writel(0, txq->bd.reg_desc_active); } -static void fec_enet_tx(struct net_device *ndev) +static void fec_enet_tx(struct net_device *ndev, int budget) { struct fec_enet_private *fep = netdev_priv(ndev); int i; /* Make sure that AVB queues are processed first. */ for (i = fep->num_tx_queues - 1; i >= 0; i--) - fec_enet_tx_queue(ndev, i); + fec_enet_tx_queue(ndev, i, budget); } static void fec_enet_update_cbd(struct fec_enet_priv_rx_q *rxq, @@ -1858,7 +1866,7 @@ static int fec_enet_rx_napi(struct napi_struct *napi, int budget) do { done += fec_enet_rx(ndev, budget - done); - fec_enet_tx(ndev); + fec_enet_tx(ndev, budget); } while ((done < budget) && fec_enet_collect_events(fep)); if (done < budget) { |