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| author | Grygorii Strashko <Grygorii.Strashko@linaro.org> | 2015-04-23 13:43:43 +0300 |
|---|---|---|
| committer | Zefan Li <lizefan@huawei.com> | 2015-09-18 09:20:35 +0800 |
| commit | df48a548aef381a3fe0cffcdcd3f6566a94df8ce (patch) | |
| tree | 93bec194a869d055086ea1a20a5ea0df66659219 | |
| parent | 5a16f737a02021d4d766246dc064814e573c505e (diff) | |
| download | lwn-df48a548aef381a3fe0cffcdcd3f6566a94df8ce.tar.gz lwn-df48a548aef381a3fe0cffcdcd3f6566a94df8ce.zip | |
mmc: core: add missing pm event in mmc_pm_notify to fix hib restore
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>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: Zefan Li <lizefan@huawei.com>
| -rw-r--r-- | drivers/mmc/core/core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index ba821fe70bca..eef126126478 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2370,6 +2370,7 @@ 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; |