linux-hardening - Re: [PATCH net-next v4 5/8] mfd: zl3073x: Add functions to work with register mailboxes

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Message-ID: <98ae9365-423c-4c7e-8b76-dcea3762ce79@lunn.ch>
Date: Thu, 24 Apr 2025 21:29:37 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Ivan Vecera <ivecera@...hat.com>
Cc: netdev@...r.kernel.org, Vadim Fedorenko <vadim.fedorenko@...ux.dev>,
	Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
	Jiri Pirko <jiri@...nulli.us>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Prathosh Satish <Prathosh.Satish@...rochip.com>,
	Lee Jones <lee@...nel.org>, Kees Cook <kees@...nel.org>,
	Andy Shevchenko <andy@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Schmidt <mschmidt@...hat.com>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH net-next v4 5/8] mfd: zl3073x: Add functions to work with
 register mailboxes

> Yes, PHC (PTP) sub-driver is using mailboxes as well. Gpio as well for some
> initial configuration.

O.K, so the mailbox code needs sharing. The question is, where do you
put it.

> > The mutex needs to be shared, but that could be in the common data
> > structure.
> 
> Do you mean that sub-device would access mutexes placed in zl3073x_dev which
> is parent (mfd) driver structure?

Yes.

	Andrew