Hi Uffe and Adrian,
Actually I'm not very sure that software CMD12 won't be sent for data error of multiple blocks r/w command with AUTO CMD12.
I will appreciate your help to review changes and confirm.
Thanks a lot.
Best regards,
Yangbo Lu
> -----Original Message-----
> From: Yangbo Lu <yangbo.lu@xxxxxxx>
> Sent: Thursday, November 14, 2019 7:18 PM
> To: linux-mmc@xxxxxxxxxxxxxxx; Ulf Hansson <ulf.hansson@xxxxxxxxxx>; Adrian
> Hunter <adrian.hunter@xxxxxxxxx>
> Cc: Y.b. Lu <yangbo.lu@xxxxxxx>
> Subject: [PATCH] mmc: sdhci: fix up CMD12 sending
>
> The STOP command is disabled for multiple blocks r/w commands with auto
> CMD12, when start to send. However, if there is data error, software still needs
> to send CMD12 according to SD spec.
> This patch is to allow software CMD12 sending for this case.
>
> Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxx>
> ---
> drivers/mmc/host/sdhci.c | 17 +++--------------
> 1 file changed, 3 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index
> 09cdbe8..3041c39 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1326,12 +1326,12 @@ static void sdhci_finish_data(struct sdhci_host
> *host)
>
> /*
> * Need to send CMD12 if -
> - * a) open-ended multiblock transfer (no CMD23)
> + * a) open-ended multiblock transfer not using auto CMD12 (no CMD23)
> * b) error in multiblock transfer
> */
> if (data->stop &&
> - (data->error ||
> - !data->mrq->sbc)) {
> + ((!data->mrq->sbc && !sdhci_auto_cmd12(host, data->mrq)) ||
> + data->error)) {
> /*
> * 'cap_cmd_during_tfr' request must not use the command line
> * after mmc_command_done() has been called. It is upper layer's
> @@ -1825,17 +1825,6 @@ void sdhci_request(struct mmc_host *mmc, struct
> mmc_request *mrq)
>
> sdhci_led_activate(host);
>
> - /*
> - * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED
> - * requests if Auto-CMD12 is enabled.
> - */
> - if (sdhci_auto_cmd12(host, mrq)) {
> - if (mrq->stop) {
> - mrq->data->stop = NULL;
> - mrq->stop = NULL;
> - }
> - }
> -
> if (!present || host->flags & SDHCI_DEVICE_DEAD) {
> mrq->cmd->error = -ENOMEDIUM;
> sdhci_finish_mrq(host, mrq);
> --
> 2.7.4
