From 75363a4676cdb046242d06dca6e8a9c0a20d6c4a Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 14 Mar 2014 18:11:22 -0700 Subject: [PATCH] sfc: Don't receive packets when the napi budget == 0 Processing any incoming packets with a with a napi budget of 0 is incorrect driver behavior. This matters as netpoll will shortly call drivers with a budget of 0 to avoid receive packet processing happening in hard irq context. Signed-off-by: "Eric W. Biederman" Signed-off-by: David S. Miller --- drivers/net/ethernet/sfc/ef10.c | 3 +++ drivers/net/ethernet/sfc/farch.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c index eb75675f6e32..651626e133f9 100644 --- a/drivers/net/ethernet/sfc/ef10.c +++ b/drivers/net/ethernet/sfc/ef10.c @@ -1955,6 +1955,9 @@ static int efx_ef10_ev_process(struct efx_channel *channel, int quota) int tx_descs = 0; int spent = 0; + if (quota <= 0) + return spent; + read_ptr = channel->eventq_read_ptr; for (;;) { diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c index aa1b169f45ec..a08761360cdf 100644 --- a/drivers/net/ethernet/sfc/farch.c +++ b/drivers/net/ethernet/sfc/farch.c @@ -1248,6 +1248,9 @@ int efx_farch_ev_process(struct efx_channel *channel, int budget) int tx_packets = 0; int spent = 0; + if (budget <= 0) + return spent; + read_ptr = channel->eventq_read_ptr; for (;;) { -- 2.20.1