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Date: Tue, 10 Jul 2018 10:52:30 +0900 (JST) From: Masahiko KIMOTO <masahiko.kimoto@...ertrust.co.jp> To: andrew@...n.ch Cc: f.fainelli@...il.com, fugang.duan@....com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, hiraku.toyooka@...ertrust.co.jp Subject: Re: [RFC PATCH 0/1] net: phy: skip autoneg of ethernet(fec) on network boot > > > I completely acknowledge and support the use case, but your > > > implementation is definitively not the way to go. In my experience the > > > problem is usually that there may be a disagreement on the > > > Pause/Asym_Pause advertisement bits and that alone is responsible for > > > triggering a re-negotiation. Can yo check if that is the case here? > > > > Thank you for your support. > > > > Concening the problem about PAUSE/Asym_PAUSE advertisement you pointed out, > > I could not understand your consideration. > > > > Would you tell me more detail about it? > > Hi Masahiko > > You said that the PHY is being configured 3 times, and might be doing > auto-neg three times. Often a phy will not actually perform auto-neg, > or do it much faster, if the advertised bits do not change with each > re-configuration. > > So check how u-boot is configuring what is advertised, and look at > what Linux is configuring. In particularly, look at the pause > configuration. If pause is configured different in u-boot and Linux, > try to make it the same. Things might go faster than. Thank you. I'll try to check out u-boot side by mii command and Linux(server) side by ethtool. --------------------------------------------------------------------------- Masahiko KIMOTO,Ph.D. / Cybertrust Japan Co., Ltd. mail: masahiko.kimoto@...ertrust.co.jp web: https://www.cybertrust.co.jp/ https://www.miraclelinux.com/
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