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Date: Tue, 6 Oct 2026 10:28:10 +0000
From: Tzung-Bi Shih <tzungbi@kernel.org>
To: James Fairweather <james.a.fairweather@gmail.com>
Cc: =?utf-8?Q?=C5=81ukasz?= Bartosik <ukaszb@chromium.org>,
	Andrei Kuchynski <akuchynski@chromium.org>,
	Jameson Thies <jthies@google.com>,
	Benson Leung <bleung@chromium.org>, chrome-platform@lists.linux.dev,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Subject: Re: [PATCH] platform/chrome: cros_usbpd_notify: Only use parent
 drvdata when parent is GOOG0004
Message-ID: <asTNOr4A_dD5Kiq9@google.com>
References: <20261003222855.23707-1-james.a.fairweather@gmail.com>
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In-Reply-To: <20261003222855.23707-1-james.a.fairweather@gmail.com>

On Sat, Oct 03, 2026 at 06:28:53PM -0400, James Fairweather wrote:
> cros_usbpd_notify_probe_acpi() takes the EC device pointer from
> dev_get_drvdata(dev->parent) and assumes it is a struct cros_ec_device.
> That only holds when GOOG0003 is a child of GOOG0004. On older devices
> without that hierarchy, such as Google Nami, GOOG0003 and GOOG0004 are
> siblings under the ACPI EC (PNP0C09):
> 
>   PNP0C09:00 (acpi-ec)
>   |-- GOOG0003:00 (cros-usbpd-notify-acpi)
>   `-- GOOG0004:00 (cros_ec_lpcs)
> 
> [...]

Applied to

    https://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux.git for-next

[1/1] platform/chrome: cros_usbpd_notify: Only use parent drvdata when parent is GOOG0004
      commit: ca75b38b1a3c2eabe81d231dae4ea180cf6287cd

Thanks!