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Commit 859ba6e3 authored by Dmitry Shmidt's avatar Dmitry Shmidt Committed by Asutosh Das
Browse files

mmc: Fix pm_notifier obeying deferred resume 

Do not resume if deferred resume is enabled.
Only resume when a request is received.

Change-Id: I1eae7dffec97d34b066bb5738c84a7e5a82f68d7
Git-commit: ac9ac6f26904c94e8aec47cab6936dd241c2eb66
Git-repo: git://git-android.quicinc.com/kernel/msm-3.10


Signed-off-by: default avatarDmitry Shmidt <dimitrysh@google.com>
[asutoshd@codeaurora.org: merge conflicts resolved]
Signed-off-by: default avatarAsutosh Das <asutoshd@codeaurora.org>
parent 80e49510

drivers/mmc/core/bus.c

+1 −1
Original line number Diff line number Diff line
@@ -179,7 +179,7 @@ static int mmc_bus_resume(struct device *dev) 
	struct mmc_host *host = card->host;

	int ret;



	if (host->bus_resume_flags & MMC_BUSRESUME_MANUAL_RESUME) {

	if (mmc_bus_manual_resume(host)) {

		host->bus_resume_flags |= MMC_BUSRESUME_NEEDS_RESUME;

		goto skip_full_resume;

	}

drivers/mmc/core/core.c

+14 −0
Original line number Diff line number Diff line
@@ -2759,11 +2759,17 @@ 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;



	pr_debug("%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 && host->card) {

		mmc_power_up(host, host->card->ocr);
@@ -3985,6 +3991,10 @@ int mmc_pm_notify(struct notifier_block *notify_block, 
	case PM_SUSPEND_PREPARE:

	case PM_RESTORE_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);
@@ -4013,6 +4023,10 @@ int mmc_pm_notify(struct notifier_block *notify_block, 


		spin_lock_irqsave(&host->lock, flags);

		host->rescan_disable = 0;

		if (mmc_bus_manual_resume(host)) {

			spin_unlock_irqrestore(&host->lock, flags);

			break;

		}

		spin_unlock_irqrestore(&host->lock, flags);

		_mmc_detect_change(host, 0, false);

include/linux/mmc/host.h

+2 −0
Original line number Diff line number Diff line
@@ -606,6 +606,8 @@ static inline void *mmc_cmdq_private(struct mmc_host *host) 
#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)

{