[PATCH v4] Fix flashing of eMMC user area with Fastboot

[Oleh Kravchenko <oleg@kaa.org.ua>]

Hello Sean,
Could you please take a look?

I've updated the patch.

19.05.21 13:31, Oleh Kravchenko ????:
> 'gpt' and 'mmc0' fastboot partitions have been treated as the same device,
> but it is wrong.
>
> Fill disk_partition structure with eMMC user partition info
> to properly flash data.
>
> Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
> Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
> Cc: Marek Vasut <marex@denx.de>
> Cc: Sean Anderson <sean.anderson@seco.com>
> Cc: Tom Rini <trini@konsulko.com>
> ---
>
>
> Changes for v2:
>    - code cleanup;
> Changes for v3:
>    - QA passed at https://github.com/u-boot/u-boot/pull/75;
> Changes for v4:
>    - fixed ugly code;
>    - QA passed at https://github.com/u-boot/u-boot/pull/75.
>
>  drivers/fastboot/fb_mmc.c | 22 +++++++++++++++-------
>  1 file changed, 15 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/fastboot/fb_mmc.c b/drivers/fastboot/fb_mmc.c
> index 2f3837e559..a009863e89 100644
> --- a/drivers/fastboot/fb_mmc.c
> +++ b/drivers/fastboot/fb_mmc.c
> @@ -512,7 +512,7 @@ void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
>  			      u32 download_bytes, char *response)
>  {
>  	struct blk_desc *dev_desc;
> -	struct disk_partition info;
> +	struct disk_partition info = {0};
>  
>  #ifdef CONFIG_FASTBOOT_MMC_BOOT_SUPPORT
>  	if (strcmp(cmd, CONFIG_FASTBOOT_MMC_BOOT1_NAME) == 0) {
> @@ -532,12 +532,7 @@ void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
>  #endif
>  
>  #if CONFIG_IS_ENABLED(EFI_PARTITION)
> -#ifndef CONFIG_FASTBOOT_MMC_USER_SUPPORT
>  	if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
> -#else
> -	if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0 ||
> -	    strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) {
> -#endif
>  		dev_desc = fastboot_mmc_get_dev(response);
>  		if (!dev_desc)
>  			return;
> @@ -599,7 +594,20 @@ void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
>  	}
>  #endif
>  
> -	if (fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0)
> +#if CONFIG_IS_ENABLED(FASTBOOT_MMC_USER_SUPPORT)
> +	if (strcmp(cmd, CONFIG_FASTBOOT_MMC_USER_NAME) == 0) {
> +		dev_desc = fastboot_mmc_get_dev(response);
> +		if (!dev_desc)
> +			return;
> +
> +		strlcpy((char *)&info.name, cmd, sizeof(info.name));
> +		info.size	= dev_desc->lba;
> +		info.blksz	= dev_desc->blksz;
> +	}
> +#endif
> +
> +	if (!info.name[0] &&
> +	    fastboot_mmc_get_part_info(cmd, &dev_desc, &info, response) < 0)
>  		return;
>  
>  	if (is_sparse_image(download_buffer)) {