Hi Faiz,
On 19/03/19 12:05 PM, Faiz Abbas wrote:
> commit 5b0d62108b46 ("mmc: sdhci-omap: Add platform specific reset
> callback") skips data resets during tuning operation. Because of this,
> a data error or data finish interrupt might still arrive after a command
> error has been handled and the mrq ended. This ends up with a "mmc0: Got
> data interrupt 0x00000002 even though no data operation was in progress"
> error message.
>
> Fix this by adding a platform specific callback for sdhci_irq. Mark the
> mrq as a failure but wait for a data interrupt instead of calling
> finish_mrq().
>
> Signed-off-by: Faiz Abbas <faiz_abbas@xxxxxx>
> ---
> drivers/mmc/host/sdhci-omap.c | 36 +++++++++++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c
> index b1a66ca3821a..765873dff7ca 100644
> --- a/drivers/mmc/host/sdhci-omap.c
> +++ b/drivers/mmc/host/sdhci-omap.c
> @@ -797,6 +797,41 @@ void sdhci_omap_reset(struct sdhci_host *host, u8 mask)
> sdhci_reset(host, mask);
> }
>
> +#define CMD_ERR_MASK (SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX)
> +#define CMD_MASK (CMD_ERR_MASK | SDHCI_INT_RESPONSE)
> +
> +static irqreturn_t sdhci_omap_irq(struct sdhci_host *host, u32 intmask)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host);
> +
> + if (omap_host->is_tuning && (intmask & CMD_ERR_MASK)) {
> +
> + /*
> + * Since we are not resetting data lines during tuning
> + * operation, data error or data complete interrupts
> + * might still arrive. Mark this request as a failure
> + * but still wait for the data interrupt
> + */
> + if (intmask & SDHCI_INT_TIMEOUT)
CMD_ERR_MASK doesn't have SDHCI_INT_TIMEOUT. So this will never be true.
Thanks
Kishon
