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Date: Tue, 28 Mar 2017 03:09:40 +0200 From: Andrew Lunn <andrew@...n.ch> To: Benjamin Herrenschmidt <benh@...nel.crashing.org> Cc: netdev@...r.kernel.org Subject: Re: genphy_read_status() vs. 1000bT Pause capability On Tue, Mar 28, 2017 at 11:49:50AM +1100, Benjamin Herrenschmidt wrote: > Hi ! > > I noticed that flow control isn't being enabled on a system I'm > working on by default. I've tracked it down to two things: > > - The realtec.c PHY driver doesn't have Pause or Asym_Pause in > its exposed capabilities. This is in part because PHY_GBIT_FEATURES > does not include SUPPORTED_Pause and SUPPORTED_Asym_Pause. Is there > a specific reason for that ? Hi Ben It is worth reading Documentation/networking/phy.txt The MAC should set SUPPORTED_Pause and SUPPORTED_Asym_Pause if the MAC supports these features. The PHY will then negotiate them. Andrew
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