2024-03-19 16:24:19

by Liming Sun

Subject: [PATCH v1 1/1] sdhci-of-dwcmshc: disable PM runtime in dwcmshc_remove()

This commit disables PM runtime in dwcmshc_remove() to avoid the
error message below when reloading the sdhci-of-dwcmshc.ko

sdhci-dwcmshc MLNXBF30:00: Unbalanced pm_runtime_enable!

Fixes: 48fe8fadbe5e ("mmc: sdhci-of-dwcmshc: Add runtime PM operations")
Reviewed-by: David Thompson <[email protected]>
Signed-off-by: Liming Sun <[email protected]>
---
drivers/mmc/host/sdhci-of-dwcmshc.c | 28 +++++++++++++++++-----------
1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
index ab4b964d4058..1d8f5a76096a 100644
--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
@@ -999,6 +999,17 @@ static int dwcmshc_probe(struct platform_device *pdev)
return err;
}

+static void dwcmshc_disable_card_clk(struct sdhci_host *host)
+{
+ u16 ctrl;
+
+ ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+ if (ctrl & SDHCI_CLOCK_CARD_EN) {
+ ctrl &= ~SDHCI_CLOCK_CARD_EN;
+ sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
+ }
+}
+
static void dwcmshc_remove(struct platform_device *pdev)
{
struct sdhci_host *host = platform_get_drvdata(pdev);
@@ -1006,8 +1017,14 @@ static void dwcmshc_remove(struct platform_device *pdev)
struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
struct rk35xx_priv *rk_priv = priv->priv;

+ pm_runtime_get_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+ pm_runtime_put_noidle(&pdev->dev);
+
sdhci_remove_host(host, 0);

+ dwcmshc_disable_card_clk(host);
+
clk_disable_unprepare(pltfm_host->clk);
clk_disable_unprepare(priv->bus_clk);
if (rk_priv)
@@ -1099,17 +1116,6 @@ static void dwcmshc_enable_card_clk(struct sdhci_host *host)
}
}

-static void dwcmshc_disable_card_clk(struct sdhci_host *host)
-{
- u16 ctrl;
-
- ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
- if (ctrl & SDHCI_CLOCK_CARD_EN) {
- ctrl &= ~SDHCI_CLOCK_CARD_EN;
- sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
- }
-}
-
static int dwcmshc_runtime_suspend(struct device *dev)
{
struct sdhci_host *host = dev_get_drvdata(dev);
--
2.30.1

2024-03-21 11:47:08

by Adrian Hunter

Subject: Re: [PATCH v1 1/1] sdhci-of-dwcmshc: disable PM runtime in dwcmshc_remove()

On 19/03/24 18:16, Liming Sun wrote:
> This commit disables PM runtime in dwcmshc_remove() to avoid the
> error message below when reloading the sdhci-of-dwcmshc.ko
>
> sdhci-dwcmshc MLNXBF30:00: Unbalanced pm_runtime_enable!
>
> Fixes: 48fe8fadbe5e ("mmc: sdhci-of-dwcmshc: Add runtime PM operations")
> Reviewed-by: David Thompson <[email protected]>
> Signed-off-by: Liming Sun <[email protected]>

Acked-by: Adrian Hunter <[email protected]>

> ---
> drivers/mmc/host/sdhci-of-dwcmshc.c | 28 +++++++++++++++++-----------
> 1 file changed, 17 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
> index ab4b964d4058..1d8f5a76096a 100644
> --- a/drivers/mmc/host/sdhci-of-dwcmshc.c
> +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
> @@ -999,6 +999,17 @@ static int dwcmshc_probe(struct platform_device *pdev)
> return err;
> }
>
> +static void dwcmshc_disable_card_clk(struct sdhci_host *host)
> +{
> + u16 ctrl;
> +
> + ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
> + if (ctrl & SDHCI_CLOCK_CARD_EN) {
> + ctrl &= ~SDHCI_CLOCK_CARD_EN;
> + sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
> + }
> +}
> +
> static void dwcmshc_remove(struct platform_device *pdev)
> {
> struct sdhci_host *host = platform_get_drvdata(pdev);
> @@ -1006,8 +1017,14 @@ static void dwcmshc_remove(struct platform_device *pdev)
> struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
> struct rk35xx_priv *rk_priv = priv->priv;
>
> + pm_runtime_get_sync(&pdev->dev);
> + pm_runtime_disable(&pdev->dev);
> + pm_runtime_put_noidle(&pdev->dev);
> +
> sdhci_remove_host(host, 0);
>
> + dwcmshc_disable_card_clk(host);
> +
> clk_disable_unprepare(pltfm_host->clk);
> clk_disable_unprepare(priv->bus_clk);
> if (rk_priv)
> @@ -1099,17 +1116,6 @@ static void dwcmshc_enable_card_clk(struct sdhci_host *host)
> }
> }
>
> -static void dwcmshc_disable_card_clk(struct sdhci_host *host)
> -{
> - u16 ctrl;
> -
> - ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
> - if (ctrl & SDHCI_CLOCK_CARD_EN) {
> - ctrl &= ~SDHCI_CLOCK_CARD_EN;
> - sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
> - }
> -}
> -
> static int dwcmshc_runtime_suspend(struct device *dev)
> {
> struct sdhci_host *host = dev_get_drvdata(dev);

2024-03-25 16:05:42

by Ulf Hansson

Subject: Re: [PATCH v1 1/1] sdhci-of-dwcmshc: disable PM runtime in dwcmshc_remove()

On Tue, 19 Mar 2024 at 17:16, Liming Sun <[email protected]> wrote:
>
> This commit disables PM runtime in dwcmshc_remove() to avoid the
> error message below when reloading the sdhci-of-dwcmshc.ko
>
> sdhci-dwcmshc MLNXBF30:00: Unbalanced pm_runtime_enable!
>
> Fixes: 48fe8fadbe5e ("mmc: sdhci-of-dwcmshc: Add runtime PM operations")
> Reviewed-by: David Thompson <[email protected]>
> Signed-off-by: Liming Sun <[email protected]>

Applied for fixes and by adding a stable tag, thanks!

Kind regards
Uffe


> ---
> drivers/mmc/host/sdhci-of-dwcmshc.c | 28 +++++++++++++++++-----------
> 1 file changed, 17 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
> index ab4b964d4058..1d8f5a76096a 100644
> --- a/drivers/mmc/host/sdhci-of-dwcmshc.c
> +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
> @@ -999,6 +999,17 @@ static int dwcmshc_probe(struct platform_device *pdev)
> return err;
> }
>
> +static void dwcmshc_disable_card_clk(struct sdhci_host *host)
> +{
> + u16 ctrl;
> +
> + ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
> + if (ctrl & SDHCI_CLOCK_CARD_EN) {
> + ctrl &= ~SDHCI_CLOCK_CARD_EN;
> + sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
> + }
> +}
> +
> static void dwcmshc_remove(struct platform_device *pdev)
> {
> struct sdhci_host *host = platform_get_drvdata(pdev);
> @@ -1006,8 +1017,14 @@ static void dwcmshc_remove(struct platform_device *pdev)
> struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host);
> struct rk35xx_priv *rk_priv = priv->priv;
>
> + pm_runtime_get_sync(&pdev->dev);
> + pm_runtime_disable(&pdev->dev);
> + pm_runtime_put_noidle(&pdev->dev);
> +
> sdhci_remove_host(host, 0);
>
> + dwcmshc_disable_card_clk(host);
> +
> clk_disable_unprepare(pltfm_host->clk);
> clk_disable_unprepare(priv->bus_clk);
> if (rk_priv)
> @@ -1099,17 +1116,6 @@ static void dwcmshc_enable_card_clk(struct sdhci_host *host)
> }
> }
>
> -static void dwcmshc_disable_card_clk(struct sdhci_host *host)
> -{
> - u16 ctrl;
> -
> - ctrl = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
> - if (ctrl & SDHCI_CLOCK_CARD_EN) {
> - ctrl &= ~SDHCI_CLOCK_CARD_EN;
> - sdhci_writew(host, ctrl, SDHCI_CLOCK_CONTROL);
> - }
> -}
> -
> static int dwcmshc_runtime_suspend(struct device *dev)
> {
> struct sdhci_host *host = dev_get_drvdata(dev);
> --
> 2.30.1
>