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mmc: sdhci-msm: pervent access to suspended controller 

commit f8def10f73 upstream.

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: 67e6db113c ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mantas Pucka 2024-03-21 14:30:01 +00:00 committed by Greg Kroah-Hartman
parent e60502b907
commit a957ea5aa3
1 changed files with 15 additions and 1 deletions
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16
drivers/mmc/host/sdhci-msm.c
View File

@ -2831,6 +2831,11 @@ 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);
@ -2845,6 +2850,7 @@ 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),
@ -2863,7 +2869,15 @@ 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 = {