From f8def10f73a516b771051a2f70f2f0446902cb4f Mon Sep 17 00:00:00 2001
From: Mantas Pucka <mantas@8devices.com>
Date: Thu, 21 Mar 2024 14:30:01 +0000
Subject: [PATCH] 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: stable@vger.kernel.org
Fixes: 67e6db113c90 ("mmc: sdhci-msm: Add pm_runtime and system PM support")
Signed-off-by: Mantas Pucka <mantas@8devices.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20240321-sdhci-mmc-suspend-v1-1-fbc555a64400@8devices.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
drivers/mmc/host/sdhci-msm.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 668e0aceeebac..e113b99a3eab5 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -2694,6 +2694,11 @@ static __maybe_unused int sdhci_msm_runtime_suspend(struct device *dev)
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);
@@ -2708,6 +2713,7 @@ static __maybe_unused int sdhci_msm_runtime_resume(struct device *dev)
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),
@@ -2726,7 +2732,15 @@ static __maybe_unused int sdhci_msm_runtime_resume(struct device *dev)
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 = {
--
2.30.2