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[PATCH] net: ethernet: ti: cpsw: fix rx-usecs interrupt pacing consistency

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The rx-usecs shouldn't be changed while interface down/up.
Currently, for instance, if it's set to 100us, after interface
down/up it's 500us. It's a hidden bug that can lead to lavish
interrupt pacing time increasing while "down/up" up to max value.

Steps to reproduce:
- set rx-usecs to be 100us
- down/up interface
- read new unexpected rx-usecs

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
---

Based on ti-linux-4.4.y

 drivers/net/ethernet/ti/cpsw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 7b44587..9919cb3 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -1352,7 +1352,7 @@ static int cpsw_ndo_open(struct net_device *ndev)
 	if (priv->coal_intvl != 0) {
 		struct ethtool_coalesce coal;
 
-		coal.rx_coalesce_usecs = (priv->coal_intvl << 4);
+		coal.rx_coalesce_usecs = priv->coal_intvl;
 		cpsw_set_coalesce(ndev, &coal);
 	}
 
-- 
1.9.1

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[PATCH] net: ethernet: ti: cpsw: fix rx-usecs interrupt pacing consistency Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> - 2016-06-02 15:20 +0200
  Re: [PATCH] net: ethernet: ti: cpsw: fix rx-usecs interrupt pacing  consistency Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org> - 2016-06-02 15:40 +0200
    Re: [PATCH] net: ethernet: ti: cpsw: fix rx-usecs interrupt pacing  consistency Grygorii Strashko <grygorii.strashko@ti.com> - 2016-06-03 18:50 +0200
  Re: [PATCH] net: ethernet: ti: cpsw: fix rx-usecs interrupt pacing  consistency David Miller <davem@davemloft.net> - 2016-06-04 01:40 +0200

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