rtl8139: drop tautologous if (ip) {...} statement (CVE-2015-5165)
The previous patch stopped using the ip pointer as an indicator that the IP header is present. When we reach the if (ip) {...} statement we know ip is always non-NULL. Remove the if statement to reduce nesting. Reported-by: N朱东海(启路) <donghai.zdh@alibaba-inc.com> Reviewed-by: NJason Wang <jasowang@redhat.com> Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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