Re: [PATCH 7/7] net: dsa: b53: Expose PTP timestamping ioctls to userspace

[Vladimir Oltean]

On Fri, Nov 26, 2021 at 09:03:48AM -0800, Richard Cochran wrote:
> On Fri, Nov 26, 2021 at 06:42:57PM +0200, Vladimir Oltean wrote:
> > I'm still missing something obvious, aren't I?
> 
> You said there are "many more" drivers with this bug, but I'm saying
> that most drivers correctly upgrade the ioctl request.
> 
> So far we have b53 and ocelot doing the buggy downgrade.  I guess it
> will require a tree wide audit to discover the "many more"...

Ah, yes, I assure you that there are many more drivers doing wacky
stuff, for example sja1105 will take any RX filter that isn't NONE, and
then reports it back as PTP_V2_L2_EVENT.
https://elixir.bootlin.com/linux/latest/source/drivers/net/dsa/sja1105/sja1105_ptp.c#L89

Somehow at this stage I don't even want to know about any other drivers,
since I might feel the urge to patch them and I don't really have the
necessary free time for that right now :D