net: reduce and unify printk level in netdev_fix_features()

Reduce printk() levels to KERN_INFO in netdev_fix_features() as this will
be used by ethtool and might spam dmesg unnecessarily.

This converts the function to use netdev_info() instead of plain printk().

As a side effect, bonding and bridge devices will now log dropped features
on every slave device change.

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

2 files changed, 13 insertions, 22 deletions

diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 52ce4a3..2a6801d 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -379,7 +379,7 @@ void br_features_recompute(struct net_bridge *br)
 	}
 
 done:
-	br->dev->features = netdev_fix_features(features, NULL);
+	br->dev->features = netdev_fix_features(br->dev, features);
 }
 
 /* called with RTNL */
diff --git a/net/core/dev.c b/net/core/dev.c
index 7103f89..1b4c07f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5213,58 +5213,49 @@ static void rollback_registered(struct net_device *dev)
 	rollback_registered_many(&single);
 }
 
-u32 netdev_fix_features(u32 features, const char *name)
+u32 netdev_fix_features(struct net_device *dev, u32 features)
 {
 	/* Fix illegal checksum combinations */
 	if ((features & NETIF_F_HW_CSUM) &&
 	    (features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
-		if (name)
-			printk(KERN_NOTICE "%s: mixed HW and IP checksum settings.\n",
-				name);
+		netdev_info(dev, "mixed HW and IP checksum settings.\n");
 		features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
 	}
 
 	if ((features & NETIF_F_NO_CSUM) &&
 	    (features & (NETIF_F_HW_CSUM|NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
-		if (name)
-			printk(KERN_NOTICE "%s: mixed no checksumming and other settings.\n",
-				name);
+		netdev_info(dev, "mixed no checksumming and other settings.\n");
 		features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM|NETIF_F_HW_CSUM);
 	}
 
 	/* Fix illegal SG+CSUM combinations. */
 	if ((features & NETIF_F_SG) &&
 	    !(features & NETIF_F_ALL_CSUM)) {
-		if (name)
-			printk(KERN_NOTICE "%s: Dropping NETIF_F_SG since no "
-			       "checksum feature.\n", name);
+		netdev_info(dev,
+			    "Dropping NETIF_F_SG since no checksum feature.\n");
 		features &= ~NETIF_F_SG;
 	}
 
 	/* TSO requires that SG is present as well. */
 	if ((features & NETIF_F_TSO) && !(features & NETIF_F_SG)) {
-		if (name)
-			printk(KERN_NOTICE "%s: Dropping NETIF_F_TSO since no "
-			       "SG feature.\n", name);
+		netdev_info(dev, "Dropping NETIF_F_TSO since no SG feature.\n");
 		features &= ~NETIF_F_TSO;
 	}
 
+	/* UFO needs SG and checksumming */
 	if (features & NETIF_F_UFO) {
 		/* maybe split UFO into V4 and V6? */
 		if (!((features & NETIF_F_GEN_CSUM) ||
 		    (features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
 			    == (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
-			if (name)
-				printk(KERN_ERR "%s: Dropping NETIF_F_UFO "
-				       "since no checksum offload features.\n",
-				       name);
+			netdev_info(dev,
+				"Dropping NETIF_F_UFO since no checksum offload features.\n");
 			features &= ~NETIF_F_UFO;
 		}
 
 		if (!(features & NETIF_F_SG)) {
-			if (name)
-				printk(KERN_ERR "%s: Dropping NETIF_F_UFO "
-				       "since no NETIF_F_SG feature.\n", name);
+			netdev_info(dev,
+				"Dropping NETIF_F_UFO since no NETIF_F_SG feature.\n");
 			features &= ~NETIF_F_UFO;
 		}
 	}
@@ -5407,7 +5398,7 @@ int register_netdevice(struct net_device *dev)
 	if (dev->iflink == -1)
 		dev->iflink = dev->ifindex;
 
-	dev->features = netdev_fix_features(dev->features, dev->name);
+	dev->features = netdev_fix_features(dev, dev->features);
 
 	/* Enable software GSO if SG is supported. */
 	if (dev->features & NETIF_F_SG)