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| author | Imre Deak <imre.deak@intel.com> | 2014-10-24 20:29:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-14 08:48:00 -0800 |
| commit | 1eaaef74ada050d820e5dd2132a56fd3c66b1549 (patch) | |
| tree | b65aee25a072493d4e2ef1865f9ae471d4e8f376 | |
| parent | a88f5eaa6802026c97ebe34c2b961d60ad9c5bfa (diff) | |
| download | lwn-1eaaef74ada050d820e5dd2132a56fd3c66b1549.tar.gz lwn-1eaaef74ada050d820e5dd2132a56fd3c66b1549.zip | |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 b26f5f1e773e..1634dc6e2fe7 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -491,8 +491,14 @@ 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(); |