[PATCH 1/4] mmc: sandbox: Initialize the status register

[Jaehoon Chung]

Hi

On 3/31/22 01:54, Sean Anderson wrote:
> The send status command expects the status register to be returned as a
> response. Without writing data back, whatever is on the stack will be
> interpreted as the status register. There are a lot of fields in this
> register, but fortunately all zeros is interpreted as "we don't support
> anything."
> 
> Signed-off-by: Sean Anderson <seanga2 at gmail.com>

Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>


Best Regards,
Jaehoon Chung

> ---
> 
>  drivers/mmc/sandbox_mmc.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mmc/sandbox_mmc.c b/drivers/mmc/sandbox_mmc.c
> index 451fe4a4e5..35159451e1 100644
> --- a/drivers/mmc/sandbox_mmc.c
> +++ b/drivers/mmc/sandbox_mmc.c
> @@ -57,6 +57,7 @@ static int sandbox_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
>  		break;
>  	case MMC_CMD_SEND_STATUS:
>  		cmd->response[0] = MMC_STATUS_RDY_FOR_DATA;
> +		memset(data->dest, '\0', data->blocks * data->blocksize);
>  		break;
>  	case MMC_CMD_SELECT_CARD:
>  		break;