Re: [PATCH] net: phy: Only resume phy if it is suspended

[Florian Fainelli]

On 12/5/23 16:10, Justin Chen wrote:
> On 12/5/23 4:03 PM, Andrew Lunn wrote:
> > On Tue, Dec 05, 2023 at 03:42:29PM -0800, Justin Chen wrote:
> > > Resuming the phy can take quite a bit of time. Lets only resume the
> > > phy if it is suspended.
> >
> > Humm...
> >
> > https://lore.kernel.org/netdev/6d45f4da-c45e-4d35-869f-85dd4ec37b31@xxxxxxx/T/
> >
> > If Broadcom PHYs are slow to resume, maybe you should solve this in
> > the broadcom resume handler, read the status from the hardware and
> > only do the resume if the hardware is suspended.
> >
> >       Andrew
>
> Right... Guess this won't work. It is odd that during resume we call 
> __phy_resume twice. Once from phy_resume() and another at phy_start(). 
> Let me rethink this. Thanks for the feedback.

This might be something for us to figure out on the driver side, I think 
historically I have always followed the pattern of doing:

phy_suspend()
phy_stop()

and

phy_resume()
phy_start()

because it used to be necessary to do that way back when...
--
Florian

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