From: Arthur Kiyanovski Date: Mon, 16 Sep 2019 14:31:34 +0300 Subject: [PATCH] net: ena: fix update of interrupt moderation register Origin: https://git.kernel.org/linus/7b8a28787e2ba671eaeb073e3b62fb4786338a09 Bug-Debian: https://bugs.debian.org/941291 Current implementation always updates the interrupt register with the smoothed_interval of the rx_ring. However this should be done only in case of adaptive interrupt moderation. If non-adaptive interrupt moderation is used, the non-adaptive interrupt moderation interval should be used. This commit fixes that. Signed-off-by: Arthur Kiyanovski Signed-off-by: David S. Miller --- drivers/net/ethernet/amazon/ena/ena_netdev.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) Index: linux/drivers/net/ethernet/amazon/ena/ena_netdev.c =================================================================== --- linux.orig/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ linux/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -1188,12 +1188,15 @@ static void ena_unmask_interrupt(struct struct ena_ring *rx_ring) { struct ena_eth_io_intr_reg intr_reg; + u32 rx_interval = ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev) ? + rx_ring->smoothed_interval : + ena_com_get_nonadaptive_moderation_interval_rx(rx_ring->ena_dev); /* Update intr register: rx intr delay, * tx intr delay and interrupt unmask */ ena_com_update_intr_reg(&intr_reg, - rx_ring->smoothed_interval, + rx_interval, tx_ring->smoothed_interval, true);