From 3897957494d979ad592a00a6ced4b6c9410e9452 Mon Sep 17 00:00:00 2001
From: Beniamino Galvani <b.galvani@gmail.com>
Date: Wed, 21 Jan 2015 19:07:27 +0100
Subject: [PATCH] net: stmmac: add BQL support

Add support for Byte Queue Limits to the STMicro MAC driver.

Tested on a Amlogic S802 quad Cortex-A9 board, where the use of BQL
decreases the latency of a high priority ping from ~12ms to ~1ms when
the 100Mbit link is saturated by 20 TCP streams.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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