Commit f8c5a875 authored by Giuseppe CAVALLARO's avatar Giuseppe CAVALLARO Committed by David S. Miller

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: default avatarGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b9cde0a8
......@@ -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);
......
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