net: implement dev_disable_lro() hw_features compatibility

Implement compatibility with new hw_features for dev_disable_lro().
This is a transition path - dev_disable_lro() should be later
integrated into netdev_fix_features() after all drivers are converted.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 15 insertions, 9 deletions

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index b297f288f6eb..ae757bcf1280 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -648,6 +648,9 @@ enum ethtool_sfeatures_retval_bits {
 
 #include <linux/rculist.h>
 
+/* needed by dev_disable_lro() */
+extern int __ethtool_set_flags(struct net_device *dev, u32 flags);
+
 struct ethtool_rx_ntuple_flow_spec_container {
         struct ethtool_rx_ntuple_flow_spec fs;
         struct list_head list;
diff --git a/net/core/dev.c b/net/core/dev.c
index 0b88eba97dab..f453370131a0 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1353,14 +1353,17 @@ EXPORT_SYMBOL(dev_close);
  */
 void dev_disable_lro(struct net_device *dev)
 {
-        if (dev->ethtool_ops && dev->ethtool_ops->get_flags &&
-            dev->ethtool_ops->set_flags) {
-                u32 flags = dev->ethtool_ops->get_flags(dev);
-                if (flags & ETH_FLAG_LRO) {
-                        flags &= ~ETH_FLAG_LRO;
-                        dev->ethtool_ops->set_flags(dev, flags);
-                }
-        }
+        u32 flags;
+
+        if (dev->ethtool_ops && dev->ethtool_ops->get_flags)
+                flags = dev->ethtool_ops->get_flags(dev);
+        else
+                flags = ethtool_op_get_flags(dev);
+
+        if (!(flags & ETH_FLAG_LRO))
+                return;
+
+        __ethtool_set_flags(dev, flags & ~ETH_FLAG_LRO);
         WARN_ON(dev->features & NETIF_F_LRO);
 }
 EXPORT_SYMBOL(dev_disable_lro);
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index a1086fb0c0c7..24bd57493c0d 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -513,7 +513,7 @@ static int ethtool_set_one_feature(struct net_device *dev,
         }
 }
 
-static int __ethtool_set_flags(struct net_device *dev, u32 data)
+int __ethtool_set_flags(struct net_device *dev, u32 data)
 {
         u32 changed;