linux-kernel - Re: [PATCH] efi: Fix comment for efi_mem_type() wrt absent physical addresses

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Date:   Mon, 11 Nov 2019 10:57:37 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org
Cc:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: Re: [PATCH] efi: Fix comment for efi_mem_type() wrt absent physical
 addresses

On 11/11/2019 10:43 AM, Anshuman Khandual wrote:
> A previous commit f99afd08a45f ("efi: Update efi_mem_type() to return an
> error rather than 0") changed the return type from EFI_RESERVED_TYPE to
> -EINVAL when the searched physical address is not present in any memory
> descriptor. But the comment preceding the function never changed. Lets
> change the comment now to reflect the new return type -EINVAL.

In the subject line, s/PATCH/PATCH V2/. Not sending yet another patch just
to fix this (in order to reduce spam). But please let me know in case that
will be essential.

> 
> Cc: Ard Biesheuvel <ard.biesheuvel@...aro.org>
> Cc: linux-efi@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
> ---
> Changes in V2:
> 
> - Changed comment for efi_mem_type() instead of the return type per Ard
> 
> V1: (https://lore.kernel.org/patchwork/patch/1149002/)
> 
>  drivers/firmware/efi/efi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
> index 77ca52d86e30..47b0bf7a2b7f 100644
> --- a/drivers/firmware/efi/efi.c
> +++ b/drivers/firmware/efi/efi.c
> @@ -899,7 +899,7 @@ u64 efi_mem_attributes(unsigned long phys_addr)
>   *
>   * Search in the EFI memory map for the region covering @phys_addr.
>   * Returns the EFI memory type if the region was found in the memory
> - * map, EFI_RESERVED_TYPE (zero) otherwise.
> + * map, -EINVAL otherwise.
>   */
>  int efi_mem_type(unsigned long phys_addr)
>  {
>