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mmc: sdhci: Fix to handle MMC_POWER_UNDEFINED 

Since commit c2c24819b2 ("mmc: core: Don't power off the card when
starting the host"), the power state can still be MMC_POWER_UNDEFINED after
mmc_start_host() is called. That can trigger a warning in SDHCI during
runtime resume as it tries to restore the I/O state. Handle
MMC_POWER_UNDEFINED simply by not updating the I/O state in that case.

Fixes: c2c24819b2 ("mmc: core: Don't power off the card when starting the host")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2016-12-19 15:33:11 +02:00 committed by Ulf Hansson
parent 5b311c1519
commit 84ec048ba1
1 changed files with 19 additions and 14 deletions
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33
drivers/mmc/host/sdhci.c
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@ -1576,6 +1576,9 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
unsigned long flags;
u8 ctrl;
if (ios->power_mode == MMC_POWER_UNDEFINED)
return;
spin_lock_irqsave(&host->lock, flags);
if (host->flags & SDHCI_DEVICE_DEAD) {
@ -2938,23 +2941,25 @@ int sdhci_runtime_resume_host(struct sdhci_host *host)
sdhci_init(host, 0);
/* Force clock and power re-program */
host->pwr = 0;
host->clock = 0;
mmc->ops->start_signal_voltage_switch(mmc, &mmc->ios);
mmc->ops->set_ios(mmc, &mmc->ios);
if (mmc->ios.power_mode != MMC_POWER_UNDEFINED) {
/* Force clock and power re-program */
host->pwr = 0;
host->clock = 0;
mmc->ops->start_signal_voltage_switch(mmc, &mmc->ios);
mmc->ops->set_ios(mmc, &mmc->ios);
if ((host_flags & SDHCI_PV_ENABLED) &&
!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) {
spin_lock_irqsave(&host->lock, flags);
sdhci_enable_preset_value(host, true);
spin_unlock_irqrestore(&host->lock, flags);
if ((host_flags & SDHCI_PV_ENABLED) &&
!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN)) {
spin_lock_irqsave(&host->lock, flags);
sdhci_enable_preset_value(host, true);
spin_unlock_irqrestore(&host->lock, flags);
}
if ((mmc->caps2 & MMC_CAP2_HS400_ES) &&
mmc->ops->hs400_enhanced_strobe)
mmc->ops->hs400_enhanced_strobe(mmc, &mmc->ios);
}
if ((mmc->caps2 & MMC_CAP2_HS400_ES) &&
mmc->ops->hs400_enhanced_strobe)
mmc->ops->hs400_enhanced_strobe(mmc, &mmc->ios);
spin_lock_irqsave(&host->lock, flags);
host->runtime_suspended = false;