linux-kernel - Re: [PATCH] mmc: host: sdhci-sprd: Fix the missing pm_runtime_put

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Date:   Mon, 15 Jul 2019 14:26:33 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Baolin Wang <baolin.wang@...aro.org>, ulf.hansson@...aro.org,
        zhang.lyra@...il.com, orsonzhai@...il.com
Cc:     vincent.guittot@...aro.org, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mmc: host: sdhci-sprd: Fix the missing
 pm_runtime_put_noidle()

On 15/07/19 1:00 PM, Baolin Wang wrote:
> When the SD host controller tries to probe again due to the derferred
> probe mechanism, it will always keep the SD host device as runtime
> resume state due to missing the runtime put operation in error path
> last time.
> 
> Thus add the pm_runtime_put_noidle() in error path to make the PM runtime
> counter balance, which can make the SD host device's PM runtime work well.
> 
> Signed-off-by: Baolin Wang <baolin.wang@...aro.org>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  drivers/mmc/host/sdhci-sprd.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
> index 6ee340a..603a5d9 100644
> --- a/drivers/mmc/host/sdhci-sprd.c
> +++ b/drivers/mmc/host/sdhci-sprd.c
> @@ -624,6 +624,7 @@ static int sdhci_sprd_probe(struct platform_device *pdev)
>  	sdhci_cleanup_host(host);
>  
>  pm_runtime_disable:
> +	pm_runtime_put_noidle(&pdev->dev);
>  	pm_runtime_disable(&pdev->dev);
>  	pm_runtime_set_suspended(&pdev->dev);
>  
>