From: Eric Dumazet <edumazet@google.com>
Date: Wed, 11 Jan 2017 03:52:43 +0000 (-0800)
Subject: gro: use min_t() in skb_gro_reset_offset()
X-Git-Tag: firefly_0821_release~176^2~4^2~4^2~12
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=db7119eaacf4653101723d1ff162f30f98267c23;p=firefly-linux-kernel-4.4.55.git

gro: use min_t() in skb_gro_reset_offset()

[ Upstream commit 7cfd5fd5a9813f1430290d20c0fead9b4582a307 ]

On 32bit arches, (skb->end - skb->data) is not 'unsigned int',
so we shall use min_t() instead of min() to avoid a compiler error.

Fixes: 1272ce87fa01 ("gro: Enter slow-path if there is no tailroom")
Reported-by: kernel test robot <fengguang.wu@intel.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index ee6c7b03b1f7..6f203c7fb166 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4187,8 +4187,9 @@ static void skb_gro_reset_offset(struct sk_buff *skb)
 	    pinfo->nr_frags &&
 	    !PageHighMem(skb_frag_page(frag0))) {
 		NAPI_GRO_CB(skb)->frag0 = skb_frag_address(frag0);
-		NAPI_GRO_CB(skb)->frag0_len = min(skb_frag_size(frag0),
-						  skb->end - skb->tail);
+		NAPI_GRO_CB(skb)->frag0_len = min_t(unsigned int,
+						    skb_frag_size(frag0),
+						    skb->end - skb->tail);
 	}
 }