diff options
| author | Giuseppe CAVALLARO <peppe.cavallaro@st.com> | 2011-10-18 00:01:19 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-19 23:24:16 (GMT) |
| commit | a9097a9666fd7b08fd2a152b2a0b6c8d48639bb2 (patch) | |
| tree | 1df8d865c78032a9bd00d49c47dd65fa87df7b8c /drivers/net/ethernet | |
| parent | 79ee1dc32b945ad71248332f3a3b355332ad3376 (diff) | |
| download | linux-a9097a9666fd7b08fd2a152b2a0b6c8d48639bb2.tar.xz | |
stmmac: protect tx process with lock (V4)
This patch fixes a problem raised on Orly ARM SMP platform
where, in case of fragmented frames, the descriptors
in the TX ring resulted broken. This was due to a missing lock
protection in the tx process.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac.h | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index 1434bdb..50e95d87 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -70,6 +70,7 @@ struct stmmac_priv { u32 msg_enable; spinlock_t lock; + spinlock_t tx_lock; int wolopts; int wolenabled; int wol_irq; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index ae5debb..f80190d 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -588,6 +588,8 @@ static void stmmac_tx(struct stmmac_priv *priv) { unsigned int txsize = priv->dma_tx_size; + spin_lock(&priv->tx_lock); + while (priv->dirty_tx != priv->cur_tx) { int last; unsigned int entry = priv->dirty_tx % txsize; @@ -651,6 +653,7 @@ static void stmmac_tx(struct stmmac_priv *priv) } netif_tx_unlock(priv->dev); } + spin_unlock(&priv->tx_lock); } static inline void stmmac_enable_irq(struct stmmac_priv *priv) @@ -1078,6 +1081,8 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_BUSY; } + spin_lock(&priv->tx_lock); + entry = priv->cur_tx % txsize; #ifdef STMMAC_XMIT_DEBUG @@ -1166,6 +1171,8 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev) priv->hw->dma->enable_dma_transmission(priv->ioaddr); + spin_unlock(&priv->tx_lock); + return NETDEV_TX_OK; } @@ -1731,6 +1738,7 @@ static int stmmac_probe(struct net_device *dev) "please, use ifconfig or nwhwconfig!\n"); spin_lock_init(&priv->lock); + spin_lock_init(&priv->tx_lock); ret = register_netdev(dev); if (ret) { |