sdhci-of-dwcmshc: disable PM runtime in dwcmshc_remove()

JIRA: https://issues.redhat.com/browse/RHEL-45234

commit 0374930
Author: Liming Sun <limings@nvidia.com>
Date: Tue, 19 Mar 2024 12:16:16 -0400

    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: 48fe8fa ("mmc: sdhci-of-dwcmshc: Add runtime PM operations")
    Reviewed-by: David Thompson <davthompson@nvidia.com>
    Signed-off-by: Liming Sun <limings@nvidia.com>
    Acked-by: Adrian Hunter <adrian.hunter@intel.com>
    Cc: stable@vger.kernel.org
    Link: https://lore.kernel.org/r/b9155963ffb12d18375002bf9ac9a3f98b727fc8.1710854108.git.limings@nvidia.com
    Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Signed-off-by: Luiz Capitulino <luizcap@redhat.com>

Author: luiz-cap

drivers/mmc/host/sdhci-of-dwcmshc.c

@@ -584,15 +584,32 @@ 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);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	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)
@@ -684,17 +701,6 @@ 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);