linux-kernel - Re: [PATCH 0/2] ACPI: scan: Introduce a replacement for acpi_bus_get

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Date:   Tue, 7 Dec 2021 13:30:20 +0200
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux ACPI <linux-acpi@...r.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Hans de Goede <hdegoede@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Subject: Re: [PATCH 0/2] ACPI: scan: Introduce a replacement for
 acpi_bus_get_device()

On Fri, Dec 03, 2021 at 05:34:58PM +0100, Rafael J. Wysocki wrote:
> Hi All,
> 
> Because acpi_bus_get_device() turned out to be problematic in the past, it has
> been changed to the point that its calling convention doesn't make much sense
> any more (ie. the pointer passed to it as the second argument is cleared on
> errors and it can only return one error value if that pointer is nonzero, so
> there is some duplication of information in there) and it has to make redundant
> checks.
> 
> Moreover, its name suggests some kind of reference counting which really isn't
> the case.
> 
> Thus patch [1/2] introduces a replacement for it, called acpi_fetch_acpi_dev(),
> and makes the code in scan.c use it instead of acpi_bus_get_device() internally.
> 
> Patch [2/2] updates all of the callers of acpi_bus_get_device() within the ACPI
> subsystem to use the replacement (which involves fixing a couple of bugs related
> to that).

Makes perfect sense!

For the series,

Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>