Patch "mmc: core: add missing pm event in mmc_pm_notify to fix hib restore" has been added to the 3.14-stable tree

Patch "mmc: core: add missing pm event in mmc_pm_notify to fix hib restore" has been added to the 3.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

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

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mmc-core-add-missing-pm-event-in-mmc_pm_notify-to-fix-hib-restore.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 184af16b09360d6273fd6160e6ff7f8e2482ef23 Mon Sep 17 00:00:00 2001
From: Grygorii Strashko <Grygorii.Strashko@linaro.org>
Date: Thu, 23 Apr 2015 13:43:43 +0300
Subject: mmc: core: add missing pm event in mmc_pm_notify to fix hib restore

From: Grygorii Strashko <Grygorii.Strashko@linaro.org>

commit 184af16b09360d6273fd6160e6ff7f8e2482ef23 upstream.

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: 4c2ef25fe0b8 (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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mmc/core/core.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2657,6 +2657,7 @@ int mmc_pm_notify(struct notifier_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);


Patches currently in stable-queue which might be from Grygorii.Strashko@linaro.org are

queue-3.14/mmc-core-add-missing-pm-event-in-mmc_pm_notify-to-fix-hib-restore.patch