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-rw-r--r--drivers/net/loopback.c3
-rw-r--r--include/linux/netdevice.h3
-rw-r--r--net/core/ethtool.c2
3 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index d70fb76edb77..4ce9e5f2c069 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -174,7 +174,8 @@ static void loopback_setup(struct net_device *dev)
| NETIF_F_HIGHDMA
| NETIF_F_LLTX
| NETIF_F_NETNS_LOCAL
- | NETIF_F_VLAN_CHALLENGED;
+ | NETIF_F_VLAN_CHALLENGED
+ | NETIF_F_LOOPBACK;
dev->ethtool_ops = &loopback_ethtool_ops;
dev->header_ops = &eth_header_ops;
dev->netdev_ops = &loopback_ops;
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d5de66af46f9..e7244ed1f9a8 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1067,6 +1067,7 @@ struct net_device {
#define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
#define NETIF_F_RXCSUM (1 << 29) /* Receive checksumming offload */
#define NETIF_F_NOCACHE_COPY (1 << 30) /* Use no-cache copyfromuser */
+#define NETIF_F_LOOPBACK (1 << 31) /* Enable loopback */
/* Segmentation offload features */
#define NETIF_F_GSO_SHIFT 16
@@ -1082,7 +1083,7 @@ struct net_device {
/* = all defined minus driver/device-class-related */
#define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
-#define NETIF_F_ETHTOOL_BITS (0x7f3fffff & ~NETIF_F_NEVER_CHANGE)
+#define NETIF_F_ETHTOOL_BITS (0xff3fffff & ~NETIF_F_NEVER_CHANGE)
/* List of features with software fallbacks. */
#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 927819d92248..b6f405888538 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -362,7 +362,7 @@ static const char netdev_features_strings[ETHTOOL_DEV_FEATURE_WORDS * 32][ETH_GS
/* NETIF_F_RXHASH */ "rx-hashing",
/* NETIF_F_RXCSUM */ "rx-checksum",
/* NETIF_F_NOCACHE_COPY */ "tx-nocache-copy"
- "",
+ /* NETIF_F_LOOPBACK */ "loopback",
};
static int __ethtool_get_sset_count(struct net_device *dev, int sset)