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Message-ID: <YW8OiIpcncIaANzN@lunn.ch> Date: Tue, 19 Oct 2021 20:29:28 +0200 From: Andrew Lunn <andrew@...n.ch> To: Erik Ekman <erik@...o.se> Cc: Edward Cree <ecree.xilinx@...il.com>, Martin Habets <habetsm.xilinx@...il.com>, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] sfc: Fix reading non-legacy supported link modes On Tue, Oct 19, 2021 at 07:41:46PM +0200, Erik Ekman wrote: > On Tue, 19 Oct 2021 at 17:21, Andrew Lunn <andrew@...n.ch> wrote: > > > > On Sun, Oct 17, 2021 at 07:16:57PM +0200, Erik Ekman wrote: > > > Everything except the first 32 bits was lost when the pause flags were > > > added. This makes the 50000baseCR2 mode flag (bit 34) not appear. > > > > > > I have tested this with a 10G card (SFN5122F-R7) by modifying it to > > > return a non-legacy link mode (10000baseCR). > > > > Does this need a Fixes: tag? Should it be added to stable? > > > > The speed flags in use that can be lost are for 50G and 100G. > The affected devices are ones based on the Solarflare EF100 networking > IP in Xilinx FPGAs supporting 10/25/40/100-gigabit. > I don't know how widespread these are, and if there might be enough > users for adding this to stable. > > The gsettings api code for sfc was added in 7cafe8f82438ced6d ("net: > sfc: use new api ethtool_{get|set}_link_ksettings") > and the bug was introduced then, but bits would only be lost after > support for 25/50/100G was added in > 5abb5e7f916ee8d2d ("sfc: add bits for 25/50/100G supported/advertised speeds"). > Not sure which of these should be used for a Fixes tag. I would you this second one, since that is when it becomes visible to users. Andrew
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