linux-kernel - Re: [PATCH v3 20/23] mailbox/riscv-sbi-mpxy: Add ACPI support

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Message-ID: <aCG34XoERpmESesO@sunil-laptop>
Date: Mon, 12 May 2025 14:27:05 +0530
From: Sunil V L <sunilvl@...tanamicro.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Anup Patel <apatel@...tanamicro.com>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jassi Brar <jassisinghbrar@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Uwe Kleine-König <ukleinek@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Len Brown <lenb@...nel.org>,
	Rahul Pathak <rpathak@...tanamicro.com>,
	Leyfoon Tan <leyfoon.tan@...rfivetech.com>,
	Atish Patra <atish.patra@...ux.dev>,
	Andrew Jones <ajones@...tanamicro.com>,
	Samuel Holland <samuel.holland@...ive.com>,
	Anup Patel <anup@...infault.org>, linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 20/23] mailbox/riscv-sbi-mpxy: Add ACPI support

On Mon, May 12, 2025 at 11:47:14AM +0300, Andy Shevchenko wrote:
> On Mon, May 12, 2025 at 02:06:37PM +0530, Sunil V L wrote:
> > On Mon, May 12, 2025 at 10:28:17AM +0300, Andy Shevchenko wrote:
> > > On Sun, May 11, 2025 at 07:09:36PM +0530, Anup Patel wrote:
> 
> ...
> 
> > > > +#ifdef CONFIG_ACPI
> > > > +	if (!acpi_disabled)
> > > 
> > > Hmm... Why do you need this check? What for?
> > > 
> > When we boot with DT, ACPI_COMPANION(dev) will return NULL which will
> > cause a crash in acpi_dev_clear_dependencies(). Let me know if I am
> > missing something.
> 
> Yes, just check that the companion is NULL, rather than the above.
> 
> 	struct acpi_device *adev;
> 
> 	adev = ACPI_COMPANION(dev);
> 	if (adev)
> 		acpi_dev_clear_dependencies(adev);
> 
Ah Ok. Sure. Will update.

Thanks!
Sunil