[PATCH] mmc: rpmb: poll mmc status after sending rpmb request

[Peng Fan]

On 5/25/2023 1:45 PM, Ji Luo wrote:
> polling the mmc status to make sure the rpmb request has been
> sent and the mmc is not in BUSY state. This avoids potential
> rpmb request failure during rpmb data write.
> 
> Signed-off-by: Ji Luo <ji.luo at nxp.com>

Reviewed-by: Peng Fan <peng.fan at nxp.com>

> ---
>   drivers/mmc/rpmb.c | 10 ++++++++++
>   1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/mmc/rpmb.c b/drivers/mmc/rpmb.c
> index b68d98573c..8bf19fd696 100644
> --- a/drivers/mmc/rpmb.c
> +++ b/drivers/mmc/rpmb.c
> @@ -94,6 +94,7 @@ static int mmc_rpmb_request(struct mmc *mmc, const struct s_rpmb *s,
>   	struct mmc_cmd cmd = {0};
>   	struct mmc_data data;
>   	struct sdhci_host *host = mmc->priv;
> +	int timeout_ms = 1000;
>   	int ret;
>   
>   	ret = mmc_set_blockcount(mmc, count, is_rel_write);
> @@ -123,6 +124,15 @@ static int mmc_rpmb_request(struct mmc *mmc, const struct s_rpmb *s,
>   #endif
>   		return 1;
>   	}
> +
> +	/* poll for the ready status */
> +	if (mmc_poll_for_busy(mmc, timeout_ms)) {
> +#ifdef CONFIG_MMC_RPMB_TRACE
> +		printf("%s:mmc is busy!\n", __func__);
> +#endif
> +		return 1;
> +	}
> +
>   	return 0;
>   }
>   static int mmc_rpmb_response(struct mmc *mmc, struct s_rpmb *s,