[PATCH V3 net-next 09/14] net/ena: use napi_complete_done() return value
From: Netanel Belgazal <hidden>
Date: 2017-01-26 22:20:54
Also in:
lkml
Subsystem:
amazon ethernet drivers, networking drivers, the rest · Maintainers:
Arthur Kiyanovski, David Arinzon, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Do not unamsk interrupts if we are in busy poll mode. Signed-off-by: Netanel Belgazal <redacted> --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 44 ++++++++++++++++++---------- 1 file changed, 29 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 606fb5c..d1e1d9d 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c@@ -1122,26 +1122,40 @@ static int ena_io_poll(struct napi_struct *napi, int budget) tx_work_done = ena_clean_tx_irq(tx_ring, tx_budget); rx_work_done = ena_clean_rx_irq(rx_ring, napi, budget); - if ((budget > rx_work_done) && (tx_budget > tx_work_done)) { - napi_complete_done(napi, rx_work_done); + /* If the device is about to reset or down, avoid unmask + * the interrupt and return 0 so NAPI won't reschedule + */ + if (unlikely(!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) || + test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags))) { + napi_complete_done(napi, 0); + ret = 0; + } else if ((budget > rx_work_done) && (tx_budget > tx_work_done)) { napi_comp_call = 1; - /* Tx and Rx share the same interrupt vector */ - if (ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev)) - ena_adjust_intr_moderation(rx_ring, tx_ring); - /* Update intr register: rx intr delay, tx intr delay and - * interrupt unmask + /* Update numa and unmask the interrupt only when schedule + * from the interrupt context (vs from sk_busy_loop) */ - ena_com_update_intr_reg(&intr_reg, - rx_ring->smoothed_interval, - tx_ring->smoothed_interval, - true); + if (napi_complete_done(napi, rx_work_done)) { + /* Tx and Rx share the same interrupt vector */ + if (ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev)) + ena_adjust_intr_moderation(rx_ring, tx_ring); + + /* Update intr register: rx intr delay, + * tx intr delay and interrupt unmask + */ + ena_com_update_intr_reg(&intr_reg, + rx_ring->smoothed_interval, + tx_ring->smoothed_interval, + true); + + /* It is a shared MSI-X. + * Tx and Rx CQ have pointer to it. + * So we use one of them to reach the intr reg + */ + ena_com_unmask_intr(rx_ring->ena_com_io_cq, &intr_reg); + } - /* It is a shared MSI-X. Tx and Rx CQ have pointer to it. - * So we use one of them to reach the intr reg - */ - ena_com_unmask_intr(rx_ring->ena_com_io_cq, &intr_reg); ena_update_ring_numa_node(tx_ring, rx_ring);
--
2.7.4