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From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Perry Yuan <Perry.Yuan@dell.com>
Cc: hdegoede@redhat.com, mgross@linux.intel.com, pali@kernel.org,
	linux-kernel@vger.kernel.org,
	platform-driver-x86@vger.kernel.org,
	Limonciello Mario <Mario.Limonciello@dell.com>
Subject: Re: [PATCH]  platform/x86: dell-privacy: Add support for new privacy driver
Date: Wed, 4 Nov 2020 01:49:15 +0000	[thread overview]
Message-ID: <20201104014915.45tbmnrqvccbrd2k@srcf.ucam.org> (raw)
In-Reply-To: <20201103125542.8572-1-Perry_Yuan@Dell.com>

On Tue, Nov 03, 2020 at 04:55:42AM -0800, Perry Yuan wrote:

> +#define PRIVACY_PlATFORM_NAME  "dell-privacy-acpi"
> +#define ACPI_PRIVACY_DEVICE	"\\_SB.PC00.LPCB.ECDV"

This looks like the EC rather than a privacy device? If so, you probably 
want to collaborate with the EC driver to obtain the handle rather than 
depending on the path, unless it's guaranteed that this path will never 
change.

> +static int micmute_led_set(struct led_classdev *led_cdev,
> +               enum led_brightness brightness)
> +{
> +    acpi_status status;
> +
> +    status = acpi_evaluate_object(NULL, ACPI_PRIVACY_EC_ACK, NULL, NULL);
> +    if (ACPI_FAILURE(status)) {
> +        dev_err(led_cdev->dev, "Error setting privacy audio EC ack value: %d\n",status);
> +        return -EIO;
> +    }
> +    return 0;
> +}

What's actually being set here? You don't seem to be passing any 
arguments.

> +static const struct acpi_device_id privacy_acpi_device_ids[] = {
> +    {"PNP0C09", 0},

Oooh no please don't do this - you'll trigger autoloading on everything 
that exposes a PNP0C09 device.

-- 
Matthew Garrett | mjg59@srcf.ucam.org

  parent reply	other threads:[~2020-11-04  2:08 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-03 12:55 Perry Yuan
2020-11-03 16:22 ` kernel test robot
2020-11-03 16:50 ` kernel test robot
2020-11-03 19:14 ` Barnabás Pőcze
2020-11-04  1:49 ` Matthew Garrett [this message]
2020-11-11  7:21   ` Yuan, Perry
2020-11-11  7:24     ` Matthew Garrett
2020-11-11 14:30       ` Limonciello, Mario
2020-11-12 15:06         ` Enrico Weigelt, metux IT consult
2020-11-12 15:31           ` Limonciello, Mario
2020-11-12 15:55             ` Hans de Goede
2020-11-12 15:57               ` Limonciello, Mario
2020-11-04  6:43 ` kernel test robot
2020-11-09 11:16 ` Hans de Goede
2020-11-11  7:24   ` Yuan, Perry

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