[PATCH 1/14] PM: Fix error code paths executed after failing syscore_suspend()

[Rafael J. Wysocki]

From: Rafael J. Wysocki <r...@sisk.pl>

If syscore_suspend() fails in suspend_enter(), create_image() or
resume_target_kernel(), it is necessary to call sysdev_resume(),
because sysdev_suspend() has been called already and succeeded
and we are going to abort the transition.

Signed-off-by: Rafael J. Wysocki <r...@sisk.pl>
---
 kernel/power/hibernate.c |   10 ++++++++--
 kernel/power/suspend.c   |    5 ++++-
 2 files changed, 12 insertions(+), 3 deletions(-)

Index: linux-2.6/kernel/power/suspend.c
===================================================================
--- linux-2.6.orig/kernel/power/suspend.c
+++ linux-2.6/kernel/power/suspend.c
@@ -164,8 +164,11 @@ static int suspend_enter(suspend_state_t
        BUG_ON(!irqs_disabled());
 
        error = sysdev_suspend(PMSG_SUSPEND);
-       if (!error)
+       if (!error) {
                error = syscore_suspend();
+               if (error)
+                       sysdev_resume();
+       }
        if (!error) {
                if (!(suspend_test(TEST_CORE) || pm_wakeup_pending())) {
                        error = suspend_ops->enter(state);
Index: linux-2.6/kernel/power/hibernate.c
===================================================================
--- linux-2.6.orig/kernel/power/hibernate.c
+++ linux-2.6/kernel/power/hibernate.c
@@ -273,8 +273,11 @@ static int create_image(int platform_mod
        local_irq_disable();
 
        error = sysdev_suspend(PMSG_FREEZE);
-       if (!error)
+       if (!error) {
                error = syscore_suspend();
+               if (error)
+                       sysdev_resume();
+       }
        if (error) {
                printk(KERN_ERR "PM: Some system devices failed to power down, "
                        "aborting hibernation\n");
@@ -407,8 +410,11 @@ static int resume_target_kernel(bool pla
        local_irq_disable();
 
        error = sysdev_suspend(PMSG_QUIESCE);
-       if (!error)
+       if (!error) {
                error = syscore_suspend();
+               if (error)
+                       sysdev_resume();
+       }
        if (error)
                goto Enable_irqs;
 

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