[PATCH] efi_driver: fix duplicate efiblk#0 issue

[AKASHI Takahiro]

On Mon, Jul 03, 2023 at 11:47:18AM +0900, Masahisa Kojima wrote:
> The devnum value of the blk_desc structure starts from 0,
> current efi_bl_create_block_device() function creates
> two "efiblk#0" devices for the cases that blk_find_max_devnum()
> returns -ENODEV and blk_find_max_devnum() returns 0(one device
> found in this case).
> 
> The devnum value for the "efiblk" name needs to be incremented.
> 
> Signed-off-by: Masahisa Kojima <masahisa.kojima at linaro.org>
> ---
>  lib/efi_driver/efi_block_device.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/lib/efi_driver/efi_block_device.c b/lib/efi_driver/efi_block_device.c
> index add00eeebb..e37bfe6e80 100644
> --- a/lib/efi_driver/efi_block_device.c
> +++ b/lib/efi_driver/efi_block_device.c
> @@ -129,6 +129,8 @@ efi_bl_create_block_device(efi_handle_t handle, void *interface)
>  		devnum = 0;
>  	else if (devnum < 0)
>  		return EFI_OUT_OF_RESOURCES;
> +	else
> +		devnum++; /* device found, note that devnum starts from 0 */

So we can use blk_next_free_devnum() instead.

-Takahiro Akashi

>  	name = calloc(1, 18); /* strlen("efiblk#2147483648") + 1 */
>  	if (!name)
> -- 
> 2.34.1
>