From: Scott Wood <scottwood@freescale.com>
Date: Thu, 11 Sep 2014 02:23:18 +0000 (-0500)
Subject: udp: Fix inverted NAPI_GRO_CB(skb)->flush test
X-Git-Tag: omap-for-v3.19/prcm-cleanup~78^2~94
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d8f7e2c8a63131828e8d4e2d98835399f27319e;p=pandora-kernel.git

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>
---

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