[PATCH RFC net-next 4/5] net: stmmac: move phylink_resume() after resume setup is complete

["Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>]

Move phylink_resume() to be after the setup in stmmac_resume() has
completed, as phylink_resume() may result in an immediate call to the
.mac_link_up method, which will enable the transmitter and receiver,
and enable the transmit queues.

This behaviour has been witnessed by Jon Hunter on the Jetson TX2
platform (Tegra 186).

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index fbcba6c71f12..23c610f7c779 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7924,12 +7924,6 @@ int stmmac_resume(struct device *dev)
 			return ret;
 	}
 
-	rtnl_lock();
-	phylink_resume(priv->phylink);
-	if (device_may_wakeup(priv->device) && !priv->plat->pmt)
-		phylink_speed_up(priv->phylink);
-	rtnl_unlock();
-
 	rtnl_lock();
 	mutex_lock(&priv->lock);
 
@@ -7948,6 +7942,11 @@ int stmmac_resume(struct device *dev)
 	stmmac_enable_all_dma_irq(priv);
 
 	mutex_unlock(&priv->lock);
+
+	phylink_resume(priv->phylink);
+	if (device_may_wakeup(priv->device) && !priv->plat->pmt)
+		phylink_speed_up(priv->phylink);
+
 	rtnl_unlock();
 
 	netif_device_attach(ndev);
-- 
2.30.2