linux-kernel - Re: [RFC PATCH 07/13] pinctrl: renesas: pinctrl-rzg2l: Validate power registers for SD and ETH

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Message-ID: <a0d7e6f4-5f4d-4601-857a-c485cceffe3b@moroto.mountain>
Date: Wed, 27 Mar 2024 10:58:03 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>,
	Linus Walleij <linus.walleij@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Magnus Damm <magnus.damm@...il.com>,
	linux-renesas-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [RFC PATCH 07/13] pinctrl: renesas: pinctrl-rzg2l: Validate
 power registers for SD and ETH

On Tue, Mar 26, 2024 at 10:28:38PM +0000, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> On RZ/V2H(P) SoC, the power registers for SD and ETH do not exist,
> resulting in invalid register offsets. Ensure that the register offsets
> are valid before any read/write operations are performed. If the power
                                                            ^^^^^^^^^^^^
> registers are not available, both SD and ETH will be set to -EINVAL.
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Where does this happen?  It doesn't seem to be a part of this patchset.
-EINVAL seems weird here, but it's hard to judge without actually seeing
it.

regards,
dan carpenter