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mmc: Fix pm_notifier obeying deferred resume

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Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
This commit is contained in:
Dmitry Shmidt
2010-10-14 15:20:21 -07:00
committed by Colin Cross
parent 1fb6e37f9d
commit 759378a80b
2 changed files with 16 additions and 1 deletions
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16
drivers/mmc/core/core.c
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@@ -1102,11 +1102,17 @@ static inline void mmc_bus_put(struct mmc_host *host)
int mmc_resume_bus(struct mmc_host *host)
{
unsigned long flags;
if (!mmc_bus_needs_resume(host))
return -EINVAL;
printk("%s: Starting deferred resume\n", mmc_hostname(host));
spin_lock_irqsave(&host->lock, flags);
host->bus_resume_flags &= ~MMC_BUSRESUME_NEEDS_RESUME;
host->rescan_disable = 0;
spin_unlock_irqrestore(&host->lock, flags);
mmc_bus_get(host);
if (host->bus_ops && !host->bus_dead) {
mmc_power_up(host);
@@ -1839,7 +1845,7 @@ int mmc_resume_host(struct mmc_host *host)
int err = 0;
mmc_bus_get(host);
if (host->bus_resume_flags & MMC_BUSRESUME_MANUAL_RESUME) {
if (mmc_bus_manual_resume(host)) {
host->bus_resume_flags |= MMC_BUSRESUME_NEEDS_RESUME;
mmc_bus_put(host);
return 0;
@@ -1895,6 +1901,10 @@ int mmc_pm_notify(struct notifier_block *notify_block,
case PM_SUSPEND_PREPARE:
spin_lock_irqsave(&host->lock, flags);
if (mmc_bus_needs_resume(host)) {
spin_unlock_irqrestore(&host->lock, flags);
break;
}
host->rescan_disable = 1;
spin_unlock_irqrestore(&host->lock, flags);
cancel_delayed_work_sync(&host->detect);
@@ -1917,6 +1927,10 @@ int mmc_pm_notify(struct notifier_block *notify_block,
case PM_POST_RESTORE:
spin_lock_irqsave(&host->lock, flags);
if (mmc_bus_manual_resume(host)) {
spin_unlock_irqrestore(&host->lock, flags);
break;
}
host->rescan_disable = 0;
spin_unlock_irqrestore(&host->lock, flags);
mmc_detect_change(host, 0);

1
include/linux/mmc/host.h
View File

@@ -321,6 +321,7 @@ static inline void *mmc_priv(struct mmc_host *host)
#define mmc_classdev(x) (&(x)->class_dev)
#define mmc_hostname(x) (dev_name(&(x)->class_dev))
#define mmc_bus_needs_resume(host) ((host)->bus_resume_flags & MMC_BUSRESUME_NEEDS_RESUME)
#define mmc_bus_manual_resume(host) ((host)->bus_resume_flags & MMC_BUSRESUME_MANUAL_RESUME)
static inline void mmc_set_bus_resume_policy(struct mmc_host *host, int manual)
{