linux-kernel - Re: [<PATCH v1> 6/9] mmc: sdhci-msm: Ignore data timeout error for R1B commands

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Message-ID: <20191218083407.GD1554871@kroah.com>
Date:   Wed, 18 Dec 2019 09:34:07 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     "Bao D. Nguyen" <nguyenb@...eaurora.org>
Cc:     ulf.hansson@...aro.org, robh+dt@...nel.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        asutoshd@...eaurora.org, cang@...eaurora.org,
        Sahitya Tummala <stummala@...eaurora.org>
Subject: Re: [<PATCH v1> 6/9] mmc: sdhci-msm: Ignore data timeout error for
 R1B commands

On Mon, Dec 16, 2019 at 06:50:39PM -0800, Bao D. Nguyen wrote:
> From: Sahitya Tummala <stummala@...eaurora.org>
> 
> Ignore data timeout error for R1B commands as there will be no
> data associated and the busy timeout value for these commands
> could be lager than the maximum timeout value that controller
> can handle.
> 
> Signed-off-by: Sahitya Tummala <stummala@...eaurora.org>
> Signed-off-by: Bao D. Nguyen <nguyenb@...eaurora.org>
> ---
>  drivers/mmc/host/sdhci.c | 15 +++++++++------
>  drivers/mmc/host/sdhci.h |  7 +++++++
>  2 files changed, 16 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index c04e1ac..0a05d74 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -2925,12 +2925,6 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
>  		 * above in sdhci_cmd_irq().
>  		 */
>  		if (data_cmd && (data_cmd->flags & MMC_RSP_BUSY)) {
> -			if (intmask & SDHCI_INT_DATA_TIMEOUT) {
> -				host->data_cmd = NULL;
> -				data_cmd->error = -ETIMEDOUT;
> -				__sdhci_finish_mrq(host, data_cmd->mrq);
> -				return;
> -			}
>  			if (intmask & SDHCI_INT_DATA_END) {
>  				host->data_cmd = NULL;
>  				/*
> @@ -2944,6 +2938,15 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
>  				__sdhci_finish_mrq(host, data_cmd->mrq);
>  				return;
>  			}
> +			if (host->quirks2 &
> +				SDHCI_QUIRK2_IGNORE_DATATOUT_FOR_R1BCMD)
> +				return;
> +			if (intmask & SDHCI_INT_DATA_TIMEOUT) {
> +				host->data_cmd = NULL;
> +				data_cmd->error = -ETIMEDOUT;
> +				__sdhci_finish_mrq(host, data_cmd->mrq);
> +				return;
> +			}
>  		}
>  
>  		/*
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index 0ed3e0e..1a88f74 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -482,6 +482,13 @@ struct sdhci_host {
>   * block count.
>   */
>  #define SDHCI_QUIRK2_USE_32BIT_BLK_CNT			(1<<18)
> +/*
> + * Ignore data timeout error for R1B commands as there will be no
> + * data associated and the busy timeout value for these commands
> + * could be lager than the maximum timeout value that controller
> + * can handle.
> + */
> +#define SDHCI_QUIRK2_IGNORE_DATATOUT_FOR_R1BCMD         (1<<19)

No tabs?

And what about using BIT(19) instead?

thanks,

greg k-h