diff options
| author | Giuseppe CAVALLARO <peppe.cavallaro@st.com> | 2012-05-13 22:18:43 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-14 18:53:20 -0400 |
| commit | f8c5a875c9124cb6439f0c97ada3570faa0d6860 (patch) | |
| tree | 488febc070188c6f37c1686405879d13f394005d /drivers | |
| parent | b9cde0a8be876c680cc549daa6246256864473fb (diff) | |
| download | linux-f8c5a875c9124cb6439f0c97ada3570faa0d6860.tar.bz2 | |
stmmac: fix suspend/resume locking
Upon resume from standby, there is a possible interrupt
unsafe locking scenario raised when configure the Kernel
with CONFIG_PROVE_LOCKING. So this patch fixes that in
PM driver stuff by calling lock/unlock_irqsave/restore.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index d1d084018877..d07bc6de4387 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -1989,6 +1989,7 @@ int stmmac_suspend(struct net_device *ndev) { struct stmmac_priv *priv = netdev_priv(ndev); int dis_ic = 0; + unsigned long flags; if (!ndev || !netif_running(ndev)) return 0; @@ -1996,7 +1997,7 @@ int stmmac_suspend(struct net_device *ndev) if (priv->phydev) phy_stop(priv->phydev); - spin_lock(&priv->lock); + spin_lock_irqsave(&priv->lock, flags); netif_device_detach(ndev); netif_stop_queue(ndev); @@ -2024,18 +2025,19 @@ int stmmac_suspend(struct net_device *ndev) /* Disable clock in case of PWM is off */ stmmac_clk_disable(priv); } - spin_unlock(&priv->lock); + spin_unlock_irqrestore(&priv->lock, flags); return 0; } int stmmac_resume(struct net_device *ndev) { struct stmmac_priv *priv = netdev_priv(ndev); + unsigned long flags; if (!netif_running(ndev)) return 0; - spin_lock(&priv->lock); + spin_lock_irqsave(&priv->lock, flags); /* Power Down bit, into the PM register, is cleared * automatically as soon as a magic packet or a Wake-up frame @@ -2063,7 +2065,7 @@ int stmmac_resume(struct net_device *ndev) netif_start_queue(ndev); - spin_unlock(&priv->lock); + spin_unlock_irqrestore(&priv->lock, flags); if (priv->phydev) phy_start(priv->phydev); |