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Message-Id: <1432654896-28478-86-git-send-email-kamal@canonical.com>
Date: Tue, 26 May 2015 08:41:29 -0700
From: Kamal Mostafa <kamal@...onical.com>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
kernel-team@...ts.ubuntu.com
Cc: Grygorii Strashko <Grygorii.Strashko@...aro.org>,
Ulf Hansson <ulf.hansson@...aro.org>,
Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 85/92] mmc: core: add missing pm event in mmc_pm_notify to fix hib restore
3.19.8-ckt1 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Grygorii Strashko <Grygorii.Strashko@...aro.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@...aro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
drivers/mmc/core/core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 9584bff..113aaec 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2620,6 +2620,7 @@ 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);
--
1.9.1
--
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