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authorTom Herbert <therbert@google.com>2014-05-07 16:51:46 -0700
committerDavid S. Miller <davem@davemloft.net>2014-05-08 23:47:50 -0400
commitb1036c6a470ccf5f18490a7ce4c99422d3bf77c4 (patch)
tree05ecb3e302e157bf34ca555e3e990696b7af92ca /net/ipv4/gre_demux.c
parent1a91de28831a1bd913e14dacf25763f3672e24a9 (diff)
downloadlinux-b1036c6a470ccf5f18490a7ce4c99422d3bf77c4.tar.bz2
gre: Call skb_checksum_simple_validate
Use skb_checksum_simple_validate to verify checksum. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/gre_demux.c')
-rw-r--r--net/ipv4/gre_demux.c24
1 files changed, 1 insertions, 23 deletions
diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c
index 250be7421ab3..fbfd829f4049 100644
--- a/net/ipv4/gre_demux.c
+++ b/net/ipv4/gre_demux.c
@@ -93,28 +93,6 @@ void gre_build_header(struct sk_buff *skb, const struct tnl_ptk_info *tpi,
}
EXPORT_SYMBOL_GPL(gre_build_header);
-static __sum16 check_checksum(struct sk_buff *skb)
-{
- __sum16 csum = 0;
-
- switch (skb->ip_summed) {
- case CHECKSUM_COMPLETE:
- csum = csum_fold(skb->csum);
-
- if (!csum)
- break;
- /* Fall through. */
-
- case CHECKSUM_NONE:
- skb->csum = 0;
- csum = __skb_checksum_complete(skb);
- skb->ip_summed = CHECKSUM_COMPLETE;
- break;
- }
-
- return csum;
-}
-
static int parse_gre_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
bool *csum_err)
{
@@ -141,7 +119,7 @@ static int parse_gre_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
options = (__be32 *)(greh + 1);
if (greh->flags & GRE_CSUM) {
- if (check_checksum(skb)) {
+ if (skb_checksum_simple_validate(skb)) {
*csum_err = true;
return -EINVAL;
}