linux-kernel - Re: [PATCH 1/4] efi: Move efi_status_to

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Date:	Mon, 21 Mar 2016 10:43:04 +0100
From:	Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:	Matt Fleming <matt@...eblueprint.co.uk>
Cc:	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	joeyli <jlee@...e.com>,
	Kweh Hock Leong <hock.leong.kweh@...el.com>,
	Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH 1/4] efi: Move efi_status_to_err() to drivers/firmware/efi/

On 17 March 2016 at 13:57, Matt Fleming <matt@...eblueprint.co.uk> wrote:
> Move efi_status_to_err() to the architecture independent code as it's
> generally useful in all bits of EFI code where there is a need to
> convert an efi_status_t to a kernel error value.
>
> Cc: Kweh Hock Leong <hock.leong.kweh@...el.com>
> Cc: Borislav Petkov <bp@...en8.de>
> Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>
> Signed-off-by: Matt Fleming <matt@...eblueprint.co.uk>

Acked-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>

> ---
>  drivers/firmware/efi/efi.c  | 33 +++++++++++++++++++++++++++++++++
>  drivers/firmware/efi/vars.c | 33 ---------------------------------
>  include/linux/efi.h         |  2 ++
>  3 files changed, 35 insertions(+), 33 deletions(-)
>
> diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
> index 3a69ed5ecfcb..b73222a52a9d 100644
> --- a/drivers/firmware/efi/efi.c
> +++ b/drivers/firmware/efi/efi.c
> @@ -637,3 +637,36 @@ u64 __weak efi_mem_attributes(unsigned long phys_addr)
>         }
>         return 0;
>  }
> +
> +int efi_status_to_err(efi_status_t status)
> +{
> +       int err;
> +
> +       switch (status) {
> +       case EFI_SUCCESS:
> +               err = 0;
> +               break;
> +       case EFI_INVALID_PARAMETER:
> +               err = -EINVAL;
> +               break;
> +       case EFI_OUT_OF_RESOURCES:
> +               err = -ENOSPC;
> +               break;
> +       case EFI_DEVICE_ERROR:
> +               err = -EIO;
> +               break;
> +       case EFI_WRITE_PROTECTED:
> +               err = -EROFS;
> +               break;
> +       case EFI_SECURITY_VIOLATION:
> +               err = -EACCES;
> +               break;
> +       case EFI_NOT_FOUND:
> +               err = -ENOENT;
> +               break;
> +       default:
> +               err = -EINVAL;
> +       }
> +
> +       return err;
> +}
> diff --git a/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c
> index 0ac594c0a234..4911d5697844 100644
> --- a/drivers/firmware/efi/vars.c
> +++ b/drivers/firmware/efi/vars.c
> @@ -314,39 +314,6 @@ check_var_size_nonblocking(u32 attributes, unsigned long size)
>         return fops->query_variable_store(attributes, size, true);
>  }
>
> -static int efi_status_to_err(efi_status_t status)
> -{
> -       int err;
> -
> -       switch (status) {
> -       case EFI_SUCCESS:
> -               err = 0;
> -               break;
> -       case EFI_INVALID_PARAMETER:
> -               err = -EINVAL;
> -               break;
> -       case EFI_OUT_OF_RESOURCES:
> -               err = -ENOSPC;
> -               break;
> -       case EFI_DEVICE_ERROR:
> -               err = -EIO;
> -               break;
> -       case EFI_WRITE_PROTECTED:
> -               err = -EROFS;
> -               break;
> -       case EFI_SECURITY_VIOLATION:
> -               err = -EACCES;
> -               break;
> -       case EFI_NOT_FOUND:
> -               err = -ENOENT;
> -               break;
> -       default:
> -               err = -EINVAL;
> -       }
> -
> -       return err;
> -}
> -
>  static bool variable_is_present(efi_char16_t *variable_name, efi_guid_t *vendor,
>                                 struct list_head *head)
>  {
> diff --git a/include/linux/efi.h b/include/linux/efi.h
> index c55c452b991a..9c8aae0e3b51 100644
> --- a/include/linux/efi.h
> +++ b/include/linux/efi.h
> @@ -1023,6 +1023,8 @@ static inline void
>  efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
>  #endif
>
> +extern int efi_status_to_err(efi_status_t status);
> +
>  /*
>   * Variable Attributes
>   */
> --
> 2.6.2
>