From 0f5c6c30a0f8c629b92ecdaef61b315c43fde10a Mon Sep 17 00:00:00 2001 From: Jisheng Zhang Date: Fri, 10 Aug 2018 11:36:27 +0800 Subject: [PATCH] net: mvneta: fix mvneta_config_rss on armada 3700 The mvneta Ethernet driver is used on a few different Marvell SoCs. Some SoCs have per cpu interrupts for Ethernet events, the driver uses a per CPU napi structure for this case. Some SoCs such as armada 3700 have a single interrupt for Ethernet events, the driver uses a global napi structure for this case. Current mvneta_config_rss() always operates the per cpu napi structure. Fix it by operating a global napi for "single interrupt" case, and per cpu napi structure for remaining cases. Signed-off-by: Jisheng Zhang Fixes: 2636ac3cc2b4 ("net: mvneta: Add network support for Armada 3700 SoC") Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- drivers/net/ethernet/marvell/mvneta.c | 31 ++++++++++++++++++++----------- 1 file changed, 20 insertions(+), 11 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 55c2a56..bc80a67 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -4107,13 +4107,18 @@ static int mvneta_config_rss(struct mvneta_port *pp) on_each_cpu(mvneta_percpu_mask_interrupt, pp, true); - /* We have to synchronise on the napi of each CPU */ - for_each_online_cpu(cpu) { - struct mvneta_pcpu_port *pcpu_port = - per_cpu_ptr(pp->ports, cpu); + if (!pp->neta_armada3700) { + /* We have to synchronise on the napi of each CPU */ + for_each_online_cpu(cpu) { + struct mvneta_pcpu_port *pcpu_port = + per_cpu_ptr(pp->ports, cpu); - napi_synchronize(&pcpu_port->napi); - napi_disable(&pcpu_port->napi); + napi_synchronize(&pcpu_port->napi); + napi_disable(&pcpu_port->napi); + } + } else { + napi_synchronize(&pp->napi); + napi_disable(&pp->napi); } pp->rxq_def = pp->indir[0]; @@ -4130,12 +4135,16 @@ static int mvneta_config_rss(struct mvneta_port *pp) mvneta_percpu_elect(pp); spin_unlock(&pp->lock); - /* We have to synchronise on the napi of each CPU */ - for_each_online_cpu(cpu) { - struct mvneta_pcpu_port *pcpu_port = - per_cpu_ptr(pp->ports, cpu); + if (!pp->neta_armada3700) { + /* We have to synchronise on the napi of each CPU */ + for_each_online_cpu(cpu) { + struct mvneta_pcpu_port *pcpu_port = + per_cpu_ptr(pp->ports, cpu); - napi_enable(&pcpu_port->napi); + napi_enable(&pcpu_port->napi); + } + } else { + napi_enable(&pp->napi); } netif_tx_start_all_queues(pp->dev); -- 2.7.4