tcp_nv: fix division by zero in tcpnv_acked()
Average RTT could become zero. This happened in real life at least twice. This patch treats zero as 1us. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: Lawrence Brakmo <Brakmo@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -252,7 +252,7 @@ static void tcpnv_acked(struct sock *sk, const struct ack_sample *sample)
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/* rate in 100's bits per second */
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rate64 = ((u64)sample->in_flight) * 8000000;
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rate = (u32)div64_u64(rate64, (u64)(avg_rtt * 100));
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rate = (u32)div64_u64(rate64, (u64)(avg_rtt ?: 1) * 100);
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/* Remember the maximum rate seen during this RTT
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* Note: It may be more than one RTT. This function should be
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