diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/freescale/fec_main.c | 40 |
1 files changed, 22 insertions, 18 deletions
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 045ea71f2b59..4e695b742030 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -1369,29 +1369,25 @@ fec_enet_interrupt(int irq, void *dev_id) { struct net_device *ndev = dev_id; struct fec_enet_private *fep = netdev_priv(ndev); + const unsigned napi_mask = FEC_ENET_RXF | FEC_ENET_TXF; uint int_events; irqreturn_t ret = IRQ_NONE; - do { - int_events = readl(fep->hwp + FEC_IEVENT); - writel(int_events, fep->hwp + FEC_IEVENT); + int_events = readl(fep->hwp + FEC_IEVENT); + writel(int_events & ~napi_mask, fep->hwp + FEC_IEVENT); - if (int_events & (FEC_ENET_RXF | FEC_ENET_TXF)) { - ret = IRQ_HANDLED; + if (int_events & napi_mask) { + ret = IRQ_HANDLED; - /* Disable the RX interrupt */ - if (napi_schedule_prep(&fep->napi)) { - writel(FEC_RX_DISABLED_IMASK, - fep->hwp + FEC_IMASK); - __napi_schedule(&fep->napi); - } - } + /* Disable the NAPI interrupts */ + writel(FEC_ENET_MII, fep->hwp + FEC_IMASK); + napi_schedule(&fep->napi); + } - if (int_events & FEC_ENET_MII) { - ret = IRQ_HANDLED; - complete(&fep->mdio_done); - } - } while (int_events); + if (int_events & FEC_ENET_MII) { + ret = IRQ_HANDLED; + complete(&fep->mdio_done); + } return ret; } @@ -1399,8 +1395,16 @@ fec_enet_interrupt(int irq, void *dev_id) static int fec_enet_rx_napi(struct napi_struct *napi, int budget) { struct net_device *ndev = napi->dev; - int pkts = fec_enet_rx(ndev, budget); struct fec_enet_private *fep = netdev_priv(ndev); + int pkts; + + /* + * Clear any pending transmit or receive interrupts before + * processing the rings to avoid racing with the hardware. + */ + writel(FEC_ENET_RXF | FEC_ENET_TXF, fep->hwp + FEC_IEVENT); + + pkts = fec_enet_rx(ndev, budget); fec_enet_tx(ndev); |