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ramips: fix locking issues in the ethernet driver 

The stats update needs to protect against being interrupted by a tasklet
The u64 stats seqlock needs to be initialized

Signed-off-by: Felix Fietkau <nbd@nbd.name>
openwrt-18.06
Felix Fietkau 2018-04-15 19:24:42 +02:00
parent e988b0fe0d
commit 173d93ea23
1 changed files with 3 additions and 2 deletions
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5
target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/mtk_eth_soc.c
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@ -477,9 +477,9 @@ static void fe_get_stats64(struct net_device *dev,
} }
if (netif_running(dev) && netif_device_present(dev)) { if (netif_running(dev) && netif_device_present(dev)) {
if (spin_trylock(&hwstats->stats_lock)) { if (spin_trylock_bh(&hwstats->stats_lock)) {
fe_stats_update(priv); fe_stats_update(priv);
spin_unlock(&hwstats->stats_lock); spin_unlock_bh(&hwstats->stats_lock);
} }
} }
@ -1581,6 +1581,7 @@ static int fe_probe(struct platform_device *pdev)
priv->tx_ring.tx_ring_size = NUM_DMA_DESC; priv->tx_ring.tx_ring_size = NUM_DMA_DESC;
priv->rx_ring.rx_ring_size = NUM_DMA_DESC; priv->rx_ring.rx_ring_size = NUM_DMA_DESC;
INIT_WORK(&priv->pending_work, fe_pending_work); INIT_WORK(&priv->pending_work, fe_pending_work);
u64_stats_init(&priv->hw_stats->syncp);
napi_weight = 16; napi_weight = 16;
if (priv->flags & FE_FLAG_NAPI_WEIGHT) { if (priv->flags & FE_FLAG_NAPI_WEIGHT) {