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>

4 files changed, 16 insertions, 25 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 7047b406b8ba..1df9f0ea9184 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1400,8 +1400,8 @@ static int bond_compute_features(struct bonding *bond)
 
 done:
         features |= (bond_dev->features & BOND_VLAN_FEATURES);
-        bond_dev->features = netdev_fix_features(features, NULL);
-        bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL);
+        bond_dev->features = netdev_fix_features(bond_dev, features);
+        bond_dev->vlan_features = netdev_fix_features(bond_dev, vlan_features);
         bond_dev->hard_header_len = max_hard_header_len;
 
         return 0;
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 0de3c59720fa..8858422c5c5d 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2399,7 +2399,7 @@ extern char *netdev_drivername(const struct net_device *dev, char *buffer, int l
 extern void linkwatch_run_queue(void);
 
 u32 netdev_increment_features(u32 all, u32 one, u32 mask);
-u32 netdev_fix_features(u32 features, const char *name);
+u32 netdev_fix_features(struct net_device *dev, u32 features);
 
 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
                                         struct net_device *dev);
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 52ce4a30f8b3..2a6801d8b728 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 7103f89fde0c..1b4c07fe295f 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)