linux-kernel - Re: [PATCH V2] mmc: tegra: add sdhci tegra suspend and resume

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Message-ID: <20190403084922.GE5238@ulmo>
Date:   Wed, 3 Apr 2019 10:49:22 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Sowjanya Komatineni <skomatineni@...dia.com>
Cc:     adrian.hunter@...el.com, ulf.hansson@...aro.org,
        jonathanh@...dia.com, anrao@...dia.com, talho@...dia.com,
        bbiswas@...dia.com, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org
Subject: Re: [PATCH V2] mmc: tegra: add sdhci tegra suspend and resume

On Tue, Apr 02, 2019 at 10:37:21AM -0700, Sowjanya Komatineni wrote:
> This patch adds suspend and resume PM ops for tegra SDHCI.
> 
> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
> ---
>  drivers/mmc/host/sdhci-tegra.c | 56 +++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 55 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
> index eafaaefab4a6..6c91926a012c 100644
> --- a/drivers/mmc/host/sdhci-tegra.c
> +++ b/drivers/mmc/host/sdhci-tegra.c
> @@ -1611,11 +1611,65 @@ static int sdhci_tegra_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +#ifdef CONFIG_PM_SLEEP
> +static int sdhci_tegra_suspend(struct device *dev)
> +{
> +	struct sdhci_host *host = dev_get_drvdata(dev);
> +	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> +	int ret;
> +
> +	if (host->mmc->caps2 & MMC_CAP2_CQE) {
> +		ret = cqhci_suspend(host->mmc);
> +		if (ret)
> +			return ret;
> +	}
> +
> +	ret = sdhci_suspend_host(host);
> +	if (ret)
> +		return ret;

I didn't spot this earlier, but I think we'd need cqhci_resume() here in
case of failure.

With that fixed:

Acked-by: Thierry Reding <treding@...dia.com>

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