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net: dsa: Do not suspend/resume closed slave_dev

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[ 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>
This commit is contained in:
Florian Fainelli 2018-07-31 17:12:52 -07:00 committed by Greg Kroah-Hartman
parent 8721f36089
commit bcbdea1371
1 changed files with 6 additions and 0 deletions
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6
net/dsa/slave.c
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@ -1219,6 +1219,9 @@ int dsa_slave_suspend(struct net_device *slave_dev)
{
struct dsa_slave_priv *p = netdev_priv(slave_dev);
if (!netif_running(slave_dev))
return 0;
netif_device_detach(slave_dev);
if (p->phy) {
@ -1236,6 +1239,9 @@ int dsa_slave_resume(struct net_device *slave_dev)
{
struct dsa_slave_priv *p = netdev_priv(slave_dev);
if (!netif_running(slave_dev))
return 0;
netif_device_attach(slave_dev);
if (p->phy) {