Commit f162b9d5 authored by Andy Fleming's avatar Andy Fleming Committed by Jeff Garzik

gianfar: Fix a locking bug in gianfar's sysfs code

During sparse cleanup, found a locking bug.  Some of the sysfs functions were
acquiring a lock, and then returning in the event of an error.  We rearrange
the code so that the lock is released in error conditions, too.
Signed-off-by: default avatarAndy Fleming <afleming@freescale.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 569f0c4d
......@@ -138,6 +138,7 @@ static int gfar_poll(struct napi_struct *napi, int budget);
static void gfar_netpoll(struct net_device *dev);
#endif
int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit);
static int gfar_clean_tx_ring(struct net_device *dev);
static int gfar_process_frame(struct net_device *dev, struct sk_buff *skb, int length);
static void gfar_vlan_rx_register(struct net_device *netdev,
struct vlan_group *grp);
......@@ -1141,7 +1142,7 @@ static int gfar_close(struct net_device *dev)
}
/* Changes the mac address if the controller is not running. */
int gfar_set_mac_address(struct net_device *dev)
static int gfar_set_mac_address(struct net_device *dev)
{
gfar_set_mac_for_addr(dev, 0, dev->dev_addr);
......@@ -1260,7 +1261,7 @@ static void gfar_timeout(struct net_device *dev)
}
/* Interrupt Handler for Transmit complete */
int gfar_clean_tx_ring(struct net_device *dev)
static int gfar_clean_tx_ring(struct net_device *dev)
{
struct txbd8 *bdp;
struct gfar_private *priv = netdev_priv(dev);
......
......@@ -782,5 +782,8 @@ extern void gfar_halt(struct net_device *dev);
extern void gfar_phy_test(struct mii_bus *bus, struct phy_device *phydev,
int enable, u32 regnum, u32 read);
void gfar_init_sysfs(struct net_device *dev);
int gfar_local_mdio_write(struct gfar_mii __iomem *regs, int mii_id,
int regnum, u16 value);
int gfar_local_mdio_read(struct gfar_mii __iomem *regs, int mii_id, int regnum);
#endif /* __GIANFAR_H */
......@@ -103,10 +103,10 @@ static ssize_t gfar_set_rx_stash_size(struct device *dev,
spin_lock_irqsave(&priv->rxlock, flags);
if (length > priv->rx_buffer_size)
return count;
goto out;
if (length == priv->rx_stash_size)
return count;
goto out;
priv->rx_stash_size = length;
......@@ -125,6 +125,7 @@ static ssize_t gfar_set_rx_stash_size(struct device *dev,
gfar_write(&priv->regs->attr, temp);
out:
spin_unlock_irqrestore(&priv->rxlock, flags);
return count;
......@@ -154,10 +155,10 @@ static ssize_t gfar_set_rx_stash_index(struct device *dev,
spin_lock_irqsave(&priv->rxlock, flags);
if (index > priv->rx_stash_size)
return count;
goto out;
if (index == priv->rx_stash_index)
return count;
goto out;
priv->rx_stash_index = index;
......@@ -166,6 +167,7 @@ static ssize_t gfar_set_rx_stash_index(struct device *dev,
temp |= ATTRELI_EI(index);
gfar_write(&priv->regs->attreli, flags);
out:
spin_unlock_irqrestore(&priv->rxlock, flags);
return count;
......
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