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authorScott Wood <scottwood@freescale.com>2014-09-11 06:23:18 +0400
committerDavid S. Miller <davem@davemloft.net>2014-09-13 01:55:41 +0400
commit2d8f7e2c8a63131828e8d4e2d98835399f27319e (patch)
tree6b0e954495b7b096baca4021d84bb8438ba7fc22 /net/ipv6/udp_offload.c
parentc5306726bc619be21303c55e09aac317072b3c25 (diff)
downloadlinux-2d8f7e2c8a63131828e8d4e2d98835399f27319e.tar.xz
udp: Fix inverted NAPI_GRO_CB(skb)->flush test
Commit 2abb7cdc0d ("udp: Add support for doing checksum unnecessary conversion") caused napi_gro_cb structs with the "flush" field zero to take the "udp_gro_receive" path rather than the "set flush to 1" path that they would previously take. As a result I saw booting from an NFS root hang shortly after starting userspace, with "server not responding" messages. This change to the handling of "flush == 0" packets appears to be incidental to the goal of adding new code in the case where skb_gro_checksum_validate_zero_check() returns zero. Based on that and the fact that it breaks things, I'm assuming that it is unintentional. Fixes: 2abb7cdc0d ("udp: Add support for doing checksum unnecessary conversion") Cc: Tom Herbert <therbert@google.com> Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/udp_offload.c')
-rw-r--r--net/ipv6/udp_offload.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c
index a1ad34b1c4ec..de85f809bf29 100644
--- a/net/ipv6/udp_offload.c
+++ b/net/ipv6/udp_offload.c
@@ -138,7 +138,7 @@ static struct sk_buff **udp6_gro_receive(struct sk_buff **head,
goto flush;
/* Don't bother verifying checksum if we're going to flush anyway. */
- if (!NAPI_GRO_CB(skb)->flush)
+ if (NAPI_GRO_CB(skb)->flush)
goto skip;
if (skb_gro_checksum_validate_zero_check(skb, IPPROTO_UDP, uh->check,