[PATCH net-next] net: skb_needs_check() accepts CHECKSUM_NONE for tx

[Eric Dumazet]

From: Eric Dumazet <eduma...@google.com>

My recent change missed fact that UFO would perform a complete
UDP checksum before segmenting in frags.

In this case skb->ip_summed is set to CHECKSUM_NONE.

We need to add this valid case to skb_needs_check()

Fixes: b2504a5dbef3 ("net: reduce skb_warn_bad_offload() noise")
Signed-off-by: Eric Dumazet <eduma...@google.com>
Cc: Willem de Bruijn <will...@google.com>
---
 net/core/dev.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 
727b6fda0e8c6497ee42dc6d3065e326e9192c21..2ba5ef33e83909871fcf69a036062e00f0cf86c7
 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2637,9 +2637,10 @@ EXPORT_SYMBOL(skb_mac_gso_segment);
 static inline bool skb_needs_check(struct sk_buff *skb, bool tx_path)
 {
        if (tx_path)
-               return skb->ip_summed != CHECKSUM_PARTIAL;
-       else
-               return skb->ip_summed == CHECKSUM_NONE;
+               return skb->ip_summed != CHECKSUM_PARTIAL &&
+                      skb->ip_summed != CHECKSUM_NONE;
+
+       return skb->ip_summed == CHECKSUM_NONE;
 }
 
 /**