diff options
| author | Imre Deak <imre.deak@intel.com> | 2014-10-24 20:29:10 +0300 |
|---|---|---|
| committer | Zefan Li <lizefan@huawei.com> | 2015-02-02 17:05:05 +0800 |
| commit | 358105b826419ac319ad05b398d40a31c52de90d (patch) | |
| tree | c2edf4a478a37b1c5d2bb97af8fd5cf88d479f40 | |
| parent | b1a76f1c42ec736247cd9a789d67532f7f2a1d31 (diff) | |
PM / Sleep: fix recovery during resuming from hibernation
commit 94fb823fcb4892614f57e59601bb9d4920f24711 upstream.
If a device's dev_pm_ops::freeze callback fails during the QUIESCE
phase, we don't rollback things correctly calling the thaw and complete
callbacks. This could leave some devices in a suspended state in case of
an error during resuming from hibernation.
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Zefan Li <lizefan@huawei.com>
| -rw-r--r-- | kernel/power/hibernate.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 52a18173c845..dd875cbe0d1a 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -486,8 +486,14 @@ int hibernation_restore(int platform_mode) error = dpm_suspend_start(PMSG_QUIESCE); if (!error) { error = resume_target_kernel(platform_mode); - dpm_resume_end(PMSG_RECOVER); + /* + * The above should either succeed and jump to the new kernel, + * or return with an error. Otherwise things are just + * undefined, so let's be paranoid. + */ + BUG_ON(!error); } + dpm_resume_end(PMSG_RECOVER); pm_restore_gfp_mask(); ftrace_start(); resume_console(); |