linux-kernel - Re: [PATCH] fix PHY polling system blocking

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Message-Id: <20100321.175651.91333124.davem@davemloft.net>
Date:	Sun, 21 Mar 2010 17:56:51 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	stefani@...bold.net
Cc:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, tglx@...utronix.de
Subject: Re: [PATCH] fix PHY polling system blocking

From: Stefani Seibold <stefani@...bold.net>
Date: Sun, 21 Mar 2010 22:54:50 +0100

> The phylib has also a drawback, because it polls the PHY despite if it
> has interrupt support for it or not. I can't see a reason for this
> behavior.

Careful, in my experience many PHYs that do have interrupt
support have buggy implementations to the point where the
interrupt support cannot be used at all.

Typically the problem is that events aren't reported reliably.

So I just wanted you to keep in mind that a chip having
interrupt support doesn't automatically mean it can be used.
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