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authorEric Dumazet <edumazet@google.com>2017-01-18 12:12:17 -0800
committerDavid S. Miller <davem@davemloft.net>2017-01-18 15:24:27 -0500
commit7be2c82cfd5d28d7adb66821a992604eb6dd112e (patch)
tree43a9e60278228617cef8d236b01a57105ee630a3
parentd89ede6d8f029d3435d8a1602d21e5be68831369 (diff)
downloadlinux-7be2c82cfd5d28d7adb66821a992604eb6dd112e.tar.bz2
net: fix harmonize_features() vs NETIF_F_HIGHDMA
Ashizuka reported a highmem oddity and sent a patch for freescale fec driver. But the problem root cause is that core networking stack must ensure no skb with highmem fragment is ever sent through a device that does not assert NETIF_F_HIGHDMA in its features. We need to call illegal_highdma() from harmonize_features() regardless of CSUM checks. Fixes: ec5f06156423 ("net: Kill link between CSUM and SG features.") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Pravin Shelar <pshelar@ovn.org> Reported-by: "Ashizuka, Yuusuke" <ashiduka@jp.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/core/dev.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 07b307b0b414..7f218e095361 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2795,9 +2795,9 @@ static netdev_features_t harmonize_features(struct sk_buff *skb,
if (skb->ip_summed != CHECKSUM_NONE &&
!can_checksum_protocol(features, type)) {
features &= ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
- } else if (illegal_highdma(skb->dev, skb)) {
- features &= ~NETIF_F_SG;
}
+ if (illegal_highdma(skb->dev, skb))
+ features &= ~NETIF_F_SG;
return features;
}