At high traffic rate, the rx ring may get completely filled before we manage to consume it. After it is filled, the kernel and device indexes are not synchronized any more, so we have to reset them, otherwise the kernel will be stuck waiting for the wrong slot to be filled.
Signed-off-by: Samuel Thibault <[email protected]> --- This is just a patch suggestion, I'm not an expert in network drivers, I leave to actual driver authors to bake a better version. diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c index 37caa88..77c8dbc 100644 --- a/drivers/net/ethernet/intel/e1000/e1000_main.c +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c @@ -3759,6 +3759,21 @@ static irqreturn_t e1000_intr(int irq, void *data) if (unlikely(test_bit(__E1000_DOWN, &adapter->flags))) return IRQ_HANDLED; + if (unlikely(icr & E1000_ICR_RXO)) { + /* Receive Overrun */ + u32 rctl; + int i; + rctl = er32(RCTL); + ew32(RCTL, rctl & ~E1000_RCTL_EN); + for (i = 0; i < adapter->num_rx_queues; i++) { + memset(adapter->rx_ring[i].desc, 0, adapter->rx_ring[i].size); + adapter->rx_ring[i].next_to_clean = 0; + } + ew32(RDH, 0); + ew32(RCTL, rctl); + adapter->netdev->stats.rx_fifo_errors++; + } + if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) { hw->get_link_status = 1; /* guard against interrupt when we're going down */ ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
