linux-kernel - Re: [PATCH] i2c: ACPI: Replace acpi_bus_get

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Date:   Tue, 1 Feb 2022 20:43:22 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Wolfram Sang <wsa@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-i2c@...r.kernel.org
Subject: Re: [PATCH] i2c: ACPI: Replace acpi_bus_get_device()

On Tue, Feb 01, 2022 at 07:00:42PM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Replace acpi_bus_get_device() that is going to be dropped with
> acpi_fetch_acpi_dev().
> 
> No intentional functional impact.

...

> +	if (!adev || i2c_acpi_get_info(adev, &info, adapter, NULL))

AFAICS the !adev check is redundant since acpi_device_enumerated() does it.

>  		return AE_OK;

...

> +	struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
>  
> -	if (i2c_acpi_do_lookup(adev, lookup))
> +	if (!adev || i2c_acpi_do_lookup(adev, lookup))
>  		return AE_OK;

Here we need it indeed.
Dunno, if acpi_dev_ready_for_enumeration() can gain the check itself.


-- 
With Best Regards,
Andy Shevchenko