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| author | Imre Deak <imre.deak@intel.com> | 2014-10-24 20:29:10 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-10-27 18:42:26 +0100 |
| commit | 94fb823fcb4892614f57e59601bb9d4920f24711 (patch) | |
| tree | 3e7ea9191719304aeb6daff1be69a94b907aa7a0 /kernel/power | |
| parent | 246ef766743618a7cab059d6c4993270075b173e (diff) | |
| download | linux-94fb823fcb4892614f57e59601bb9d4920f24711.tar.gz | |
PM / Sleep: fix recovery during resuming from hibernation
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> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
| -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 a9dfa79b6bab..1f35a3478f3c 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -502,8 +502,14 @@ 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(); resume_console(); pm_restore_console(); |