4.17-stable review patch. If anyone has any objections, please let me know.
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From: Andrew Lunn andrew@lunn.ch
[ Upstream commit 7a86f05faf112463cfbbdfd222012e247de461a1 ]
The mvneta Ethernet driver is used on a few different Marvell SoCs. Some SoCs have per cpu interrupts for Ethernet events. Some SoCs have a single interrupt, independent of the CPU. The driver handles this by having a per CPU napi structure when there are per CPU interrupts, and a global napi structure when there is a single interrupt.
When the napi core calls mvneta_poll(), it passes the napi instance. This was not being propagated through the call chain, and instead the per-cpu napi instance was passed to napi_gro_receive() call. This breaks when there is a single global napi instance.
Signed-off-by: Andrew Lunn andrew@lunn.ch Fixes: 2636ac3cc2b4 ("net: mvneta: Add network support for Armada 3700 SoC") Signed-off-by: Gregory CLEMENT gregory.clement@bootlin.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/marvell/mvneta.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-)
--- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -1901,10 +1901,10 @@ static void mvneta_rxq_drop_pkts(struct }
/* Main rx processing when using software buffer management */ -static int mvneta_rx_swbm(struct mvneta_port *pp, int rx_todo, +static int mvneta_rx_swbm(struct napi_struct *napi, + struct mvneta_port *pp, int rx_todo, struct mvneta_rx_queue *rxq) { - struct mvneta_pcpu_port *port = this_cpu_ptr(pp->ports); struct net_device *dev = pp->dev; int rx_done; u32 rcvd_pkts = 0; @@ -1959,7 +1959,7 @@ err_drop_frame:
skb->protocol = eth_type_trans(skb, dev); mvneta_rx_csum(pp, rx_status, skb); - napi_gro_receive(&port->napi, skb); + napi_gro_receive(napi, skb);
rcvd_pkts++; rcvd_bytes += rx_bytes; @@ -2001,7 +2001,7 @@ err_drop_frame:
mvneta_rx_csum(pp, rx_status, skb);
- napi_gro_receive(&port->napi, skb); + napi_gro_receive(napi, skb); }
if (rcvd_pkts) { @@ -2020,10 +2020,10 @@ err_drop_frame: }
/* Main rx processing when using hardware buffer management */ -static int mvneta_rx_hwbm(struct mvneta_port *pp, int rx_todo, +static int mvneta_rx_hwbm(struct napi_struct *napi, + struct mvneta_port *pp, int rx_todo, struct mvneta_rx_queue *rxq) { - struct mvneta_pcpu_port *port = this_cpu_ptr(pp->ports); struct net_device *dev = pp->dev; int rx_done; u32 rcvd_pkts = 0; @@ -2085,7 +2085,7 @@ err_drop_frame:
skb->protocol = eth_type_trans(skb, dev); mvneta_rx_csum(pp, rx_status, skb); - napi_gro_receive(&port->napi, skb); + napi_gro_receive(napi, skb);
rcvd_pkts++; rcvd_bytes += rx_bytes; @@ -2129,7 +2129,7 @@ err_drop_frame:
mvneta_rx_csum(pp, rx_status, skb);
- napi_gro_receive(&port->napi, skb); + napi_gro_receive(napi, skb); }
if (rcvd_pkts) { @@ -2722,9 +2722,11 @@ static int mvneta_poll(struct napi_struc if (rx_queue) { rx_queue = rx_queue - 1; if (pp->bm_priv) - rx_done = mvneta_rx_hwbm(pp, budget, &pp->rxqs[rx_queue]); + rx_done = mvneta_rx_hwbm(napi, pp, budget, + &pp->rxqs[rx_queue]); else - rx_done = mvneta_rx_swbm(pp, budget, &pp->rxqs[rx_queue]); + rx_done = mvneta_rx_swbm(napi, pp, budget, + &pp->rxqs[rx_queue]); }
if (rx_done < budget) {