Messages in this thread | | | Date | Sat, 6 Nov 2021 02:36:06 +0200 | From | Vladimir Oltean <> | Subject | Re: [PATCH 7/7] net: dsa: b53: Expose PTP timestamping ioctls to userspace |
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On Fri, Nov 05, 2021 at 05:18:04PM -0700, Richard Cochran wrote: > On Fri, Nov 05, 2021 at 04:28:33PM +0200, Vladimir Oltean wrote: > > What is the expected convention exactly? There are other drivers that > > downgrade the user application's request to what they support, and at > > least ptp4l does not error out, it just prints a warning. > > Drivers may upgrade, but they may not downgrade. > > Which drivers downgrade? We need to fix those buggy drivers. > > Thanks, > Richard
Just a quick example https://elixir.bootlin.com/linux/v5.15/source/drivers/net/ethernet/mscc/ocelot.c#L1178 I haven't studied the whole tree, but I'm sure there are many more.
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