[PATCH 3/9] efi: Remove redundant creation of the "efivars" platform device

Sudeep Holla posted 9 patches 9 months ago
There is a newer version of this series
[PATCH 3/9] efi: Remove redundant creation of the "efivars" platform device
Posted by Sudeep Holla 9 months ago
The "efivars" platform device is created but never tracked or used,
as there is no driver associated with it. Since this device serves
no functional purpose, removing its creation without affecting any
functionality.

Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: linux-efi@vger.kernel.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/firmware/efi/efi.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 7309394b8fc98cf7a3424af209b752f0251c8c89..eec173cb1f398d3b4f28b42c917e50e1728dc277 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -446,7 +446,6 @@ static int __init efisubsys_init(void)
 		error = efivar_ssdt_load();
 		if (error)
 			pr_err("efi: failed to load SSDT, error %d.\n", error);
-		platform_device_register_simple("efivars", 0, NULL, 0);
 	}
 
 	BLOCKING_INIT_NOTIFIER_HEAD(&efivar_ops_nh);

-- 
2.34.1
Re: [PATCH 3/9] efi: Remove redundant creation of the "efivars" platform device
Posted by Ard Biesheuvel 9 months ago
On Mon, 17 Mar 2025 at 11:13, Sudeep Holla <sudeep.holla@arm.com> wrote:
>
> The "efivars" platform device is created but never tracked or used,
> as there is no driver associated with it. Since this device serves
> no functional purpose, removing its creation without affecting any
> functionality.
>
> Cc: Ard Biesheuvel <ardb@kernel.org>
> Cc: linux-efi@vger.kernel.org
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
>  drivers/firmware/efi/efi.c | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
> index 7309394b8fc98cf7a3424af209b752f0251c8c89..eec173cb1f398d3b4f28b42c917e50e1728dc277 100644
> --- a/drivers/firmware/efi/efi.c
> +++ b/drivers/firmware/efi/efi.c
> @@ -446,7 +446,6 @@ static int __init efisubsys_init(void)
>                 error = efivar_ssdt_load();
>                 if (error)
>                         pr_err("efi: failed to load SSDT, error %d.\n", error);
> -               platform_device_register_simple("efivars", 0, NULL, 0);
>         }
>
>         BLOCKING_INIT_NOTIFIER_HEAD(&efivar_ops_nh);
>

IIRC the efi-pstore module autoloads based on this platform device
Re: [PATCH 3/9] efi: Remove redundant creation of the "efivars" platform device
Posted by Sudeep Holla 9 months ago
On Mon, Mar 17, 2025 at 06:06:24PM +0100, Ard Biesheuvel wrote:
> On Mon, 17 Mar 2025 at 11:13, Sudeep Holla <sudeep.holla@arm.com> wrote:
> >
> > The "efivars" platform device is created but never tracked or used,
> > as there is no driver associated with it. Since this device serves
> > no functional purpose, removing its creation without affecting any
> > functionality.
> >
> > Cc: Ard Biesheuvel <ardb@kernel.org>
> > Cc: linux-efi@vger.kernel.org
> > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> > ---
> >  drivers/firmware/efi/efi.c | 1 -
> >  1 file changed, 1 deletion(-)
> >
> > diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
> > index 7309394b8fc98cf7a3424af209b752f0251c8c89..eec173cb1f398d3b4f28b42c917e50e1728dc277 100644
> > --- a/drivers/firmware/efi/efi.c
> > +++ b/drivers/firmware/efi/efi.c
> > @@ -446,7 +446,6 @@ static int __init efisubsys_init(void)
> >                 error = efivar_ssdt_load();
> >                 if (error)
> >                         pr_err("efi: failed to load SSDT, error %d.\n", error);
> > -               platform_device_register_simple("efivars", 0, NULL, 0);
> >         }
> >
> >         BLOCKING_INIT_NOTIFIER_HEAD(&efivar_ops_nh);
> >
>
> IIRC the efi-pstore module autoloads based on this platform device

Indeed I see now, thanks. My bad grep skills didn't work well to catch
this. I will update accordingly.

-- 
Regards,
Sudeep