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authorLorenzo Bianconi2020-06-09 00:02:39 +0200
committerDavid S. Miller2020-06-09 14:29:15 -0700
commit62a502cc91f97e3ffd312d9b42e8d01a137c63ff (patch)
tree2b91438f58105b23f50d45e42df1d82e10d04669 /drivers/net
parentc96b6acc8f89a4a7f6258dfe1d077654c11415be (diff)
net: mvneta: do not redirect frames during reconfiguration
Disable frames injection in mvneta_xdp_xmit routine during hw re-configuration in order to avoid hardware hangs Fixes: b0a43db9087a ("net: mvneta: add XDP_TX support") Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/marvell/mvneta.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 4cc9abd61c43..946925bbcb2d 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -452,11 +452,17 @@ struct mvneta_pcpu_port {
u32 cause_rx_tx;
};
+enum {
+ __MVNETA_DOWN,
+};
+
struct mvneta_port {
u8 id;
struct mvneta_pcpu_port __percpu *ports;
struct mvneta_pcpu_stats __percpu *stats;
+ unsigned long state;
+
int pkt_size;
void __iomem *base;
struct mvneta_rx_queue *rxqs;
@@ -2113,6 +2119,9 @@ mvneta_xdp_xmit(struct net_device *dev, int num_frame,
struct netdev_queue *nq;
u32 ret;
+ if (unlikely(test_bit(__MVNETA_DOWN, &pp->state)))
+ return -ENETDOWN;
+
if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
return -EINVAL;
@@ -3568,12 +3577,16 @@ static void mvneta_start_dev(struct mvneta_port *pp)
phylink_start(pp->phylink);
netif_tx_start_all_queues(pp->dev);
+
+ clear_bit(__MVNETA_DOWN, &pp->state);
}
static void mvneta_stop_dev(struct mvneta_port *pp)
{
unsigned int cpu;
+ set_bit(__MVNETA_DOWN, &pp->state);
+
phylink_stop(pp->phylink);
if (!pp->neta_armada3700) {