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

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Message-Id: <20160603.193534.1267260598418078664.davem@davemloft.net>
Date:	Fri, 03 Jun 2016 19:35:34 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	ivan.khoronzhuk@...aro.org
Cc:	linux-kernel@...r.kernel.org, mugunthanvnm@...com,
	grygorii.strashko@...com, linux-omap@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] net: ethernet: ti: cpsw: fix rx-usecs interrupt pacing
 consistency

From: Ivan Khoronzhuk <ivan.khoronzhuk@...aro.org>
Date: Thu,  2 Jun 2016 16:14:52 +0300

> 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@...aro.org>

Applied.