4.4-stable review patch. If anyone has any objections, please let me know.
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From: Florian Fainelli f.fainelli@gmail.com
[ Upstream commit a94c689e6c9e72e722f28339e12dff191ee5a265 ]
If a DSA slave network device was previously disabled, there is no need to suspend or resume it.
Fixes: 2446254915a7 ("net: dsa: allow switch drivers to implement suspend/resume hooks") Signed-off-by: Florian Fainelli f.fainelli@gmail.com Reviewed-by: Andrew Lunn andrew@lunn.ch Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/dsa/slave.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -1099,6 +1099,9 @@ int dsa_slave_suspend(struct net_device { struct dsa_slave_priv *p = netdev_priv(slave_dev);
+ if (!netif_running(slave_dev)) + return 0; + netif_device_detach(slave_dev);
if (p->phy) { @@ -1116,6 +1119,9 @@ int dsa_slave_resume(struct net_device * { struct dsa_slave_priv *p = netdev_priv(slave_dev);
+ if (!netif_running(slave_dev)) + return 0; + netif_device_attach(slave_dev);
if (p->phy) {