linux-kernel - Re: [PATCH v3] hisi_lpc: Use acpi_dev_for_each

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Message-ID: <Yr6xsKbZSMWywUKo@kroah.com>
Date:   Fri, 1 Jul 2022 10:34:56 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux ACPI <linux-acpi@...r.kernel.org>,
        John Garry <john.garry@...wei.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH v3] hisi_lpc: Use acpi_dev_for_each_child()

On Thu, Jun 30, 2022 at 08:13:52PM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Subject: [PATCH] hisi_lpc: Use acpi_dev_for_each_child()
> 
> Instead of walking the list of children of an ACPI device directly,
> use acpi_dev_for_each_child() to carry out an action for all of
> the given ACPI device's children.
> 
> This will help to eliminate the children list head from struct
> acpi_device as it is redundant and it is used in questionable ways
> in some places (in particular, locking is needed for walking the
> list pointed to it safely, but it is often missing).
> 
> While at it, simplify hisi_lpc_acpi_set_io_res() by making it accept
> a struct acpi_device pointer from the caller, instead of going to
> struct device and back to get the same result, and clean up confusion
> regarding hostdev and its ACPI companion in that function.
> 
> Also remove a redundant check from it.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>