mmc: sdhci-msm: pervent access to suspended controller

Generic sdhci code registers LED device and uses host->runtime_suspended
flag to protect access to it. The sdhci-msm driver doesn't set this flag,
which causes a crash when LED is accessed while controller is runtime
suspended. Fix this by setting the flag correctly.

Cc: [e-mail]
Fixes: 67e6db113c90 ("mmc: sdhci-msm: Add pm_runtime and system PM support")
Signed-off-by: Mantas Pucka <[e-mail]>
Acked-by: Adrian Hunter <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/sdhci-msm.c

···
 	struct sdhci_host *host = dev_get_drvdata(dev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	host->runtime_suspended = true;
+	spin_unlock_irqrestore(&host->lock, flags);
 
 	/* Drop the performance vote */
 	dev_pm_opp_set_rate(dev, 0);
···
 	struct sdhci_host *host = dev_get_drvdata(dev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
+	unsigned long flags;
 	int ret;
 
 	ret = clk_bulk_prepare_enable(ARRAY_SIZE(msm_host->bulk_clks),
···
 
 	dev_pm_opp_set_rate(dev, msm_host->clk_rate);
 
-	return sdhci_msm_ice_resume(msm_host);
+	ret = sdhci_msm_ice_resume(msm_host);
+	if (ret)
+		return ret;
+
+	spin_lock_irqsave(&host->lock, flags);
+	host->runtime_suspended = false;
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	return ret;
 }
 
 static const struct dev_pm_ops sdhci_msm_pm_ops = {