From 94fb823fcb4892614f57e59601bb9d4920f24711 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Fri, 24 Oct 2014 20:29:10 +0300 Subject: 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 Cc: All applicable Signed-off-by: Rafael J. Wysocki --- kernel/power/hibernate.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) 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(); -- cgit v1.2.3-58-ga151