linux-kernel - Re: [PATCH] ACPI: dock: fix enum-conversion warning

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Message-ID: <CAJZ5v0hh2XSco-TdUS83piwpTyQk==VUo7nGi9+rKsK2P6u33g@mail.gmail.com>
Date:   Tue, 27 Oct 2020 19:31:32 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>, Yinghai Lu <yinghai@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Hanjun Guo <guohanjun@...wei.com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI: dock: fix enum-conversion warning

On Mon, Oct 26, 2020 at 10:48 PM Arnd Bergmann <arnd@...nel.org> wrote:
>
> From: Arnd Bergmann <arnd@...db.de>
>
> gcc points out a type mismatch:
>
> drivers/acpi/dock.c: In function 'hot_remove_dock_devices':
> drivers/acpi/dock.c:234:53: warning: implicit conversion from 'enum <anonymous>' to 'enum dock_callback_type' [-Wenum-conversion]
>   234 |   dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, false);
>
> This is harmless because 'false' still has the correct numeric value,
> but passing DOCK_CALL_HANDLER documents better what is going on
> and avoids the warning.
>
> Fixes: 37f908778f20 ("ACPI / dock: Walk list in reverse order during removal of devices")
> Fixes: f09ce741a03a ("ACPI / dock / PCI: Drop ACPI dock notifier chain")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/acpi/dock.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
> index 45d4b7b69de8..24e076f44d23 100644
> --- a/drivers/acpi/dock.c
> +++ b/drivers/acpi/dock.c
> @@ -231,7 +231,8 @@ static void hot_remove_dock_devices(struct dock_station *ds)
>          * between them).
>          */
>         list_for_each_entry_reverse(dd, &ds->dependent_devices, list)
> -               dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST, false);
> +               dock_hotplug_event(dd, ACPI_NOTIFY_EJECT_REQUEST,
> +                                  DOCK_CALL_HANDLER);
>
>         list_for_each_entry_reverse(dd, &ds->dependent_devices, list)
>                 acpi_bus_trim(dd->adev);
> --

Applied as 5.10-rc material, thanks!