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Date:   Fri, 6 Oct 2023 11:30:20 +0300
From:   Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To:     Tony Lindgren <tony@atomide.com>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jiri Slaby <jirislaby@kernel.org>, Dhruva Gole <d-gole@ti.com>,
        Ilpo =?iso-8859-1?Q?J=E4rvinen?= <ilpo.jarvinen@linux.intel.com>,
        John Ogness <john.ogness@linutronix.de>,
        Johan Hovold <johan@kernel.org>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
        Maximilian Luz <luzmaximilian@gmail.com>
Subject: Re: [PATCH] serial: core: Fix checks for tx runtime PM state
Message-ID: <ZR/FnJ9TlnSTcHtk@smile.fi.intel.com>
References: <20231005075644.25936-1-tony@atomide.com>
 <ZR6lc/F1Esxt5ChI@smile.fi.intel.com>
 <20231006072738.GI34982@atomide.com>
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On Fri, Oct 06, 2023 at 10:27:38AM +0300, Tony Lindgren wrote:
> * Andy Shevchenko <andriy.shevchenko@linux.intel.com> [231005 12:01]:
> > On Thu, Oct 05, 2023 at 10:56:42AM +0300, Tony Lindgren wrote:
> > > The serdev device and the serial core controller devices are siblings of
> > > the serial port hardware device. The runtime PM usage count from serdev
> > 
> > I'm a bit lost in terminology here.
> > AFAIU there are:
> > 1) children of the serial physical device;
> > 2) siblings (to each other).
> > 
> > But may be I mistakenly deciphered the diagram from the previous discussion.
> 
> You're right, so how about:
> 
> The serdev device and the serial core controller devices are children of
> the serial port hardware device. The runtime PM usage count from serdev
> device does not propagate to the serial core device siblings, it only
> propagates to the parent.

Clearer, thank you!

-- 
With Best Regards,
Andy Shevchenko