Commit 184af16b authored Apr 23, 2015 by Grygorii Strashko Committed by Ulf Hansson May 04, 2015

mmc: core: add missing pm event in mmc_pm_notify to fix hib restore

The PM_RESTORE_PREPARE is not handled now in mmc_pm_notify(),
as result mmc_rescan() could be scheduled and executed at
late hibernation restore stages when MMC device is suspended
already - which, in turn, will lead to system crash on TI dra7-evm board:

WARNING: CPU: 0 PID: 3188 at drivers/bus/omap_l3_noc.c:148 l3_interrupt_handler+0x258/0x374()
44000000.ocp:L3 Custom Error: MASTER MPU TARGET L4_PER1_P3 (Idle): Data Access in User mode during Functional access

Hence, add missed PM_RESTORE_PREPARE PM event in mmc_pm_notify().

Fixes: 4c2ef25f (mmc: fix all hangs related to mmc/sd card...)
Signed-off-by: Grygorii Strashko <Grygorii.Strashko@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

parent 5ebe6afa

drivers/mmc/core/core.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2651,6 +2651,7 @@ int mmc_pm_notify(struct notifier_block *notify_block,
		switch (mode) {
		case PM_HIBERNATION_PREPARE:
		case PM_SUSPEND_PREPARE:
		case PM_RESTORE_PREPARE:
		spin_lock_irqsave(&host->lock, flags);
		host->rescan_disable = 1;
		spin_unlock_irqrestore(&host->lock, flags);

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