From: Rafael J. Wysocki <[email protected]> As a preparation for subsequent changes, rearrange the core suspend-to-idle code by moving the initial invocation of dpm_suspend_noirq() into s2idle_loop().
This also causes debug messages from that code to appear in a less confusing order. Signed-off-by: Rafael J. Wysocki <[email protected]> --- kernel/power/power.h | 4 ++++ kernel/power/suspend.c | 26 +++++++++++++------------- 2 files changed, 17 insertions(+), 13 deletions(-) Index: linux-pm/kernel/power/suspend.c =================================================================== --- linux-pm.orig/kernel/power/suspend.c +++ linux-pm/kernel/power/suspend.c @@ -106,7 +106,13 @@ static void s2idle_loop(void) { pm_pr_dbg("suspend-to-idle\n"); - do { + while (!dpm_suspend_noirq(PMSG_SUSPEND)) { + /* + * Suspend-to-idle equals + * frozen processes + suspended devices + idle processors. + * Thus freeze_enter() should be called right after + * all devices have been suspended. + */ freeze_enter(); if (freeze_ops && freeze_ops->wake) @@ -120,7 +126,7 @@ static void s2idle_loop(void) break; pm_wakeup_clear(false); - } while (!dpm_suspend_noirq(PMSG_SUSPEND)); + } pm_pr_dbg("resume from suspend-to-idle\n"); } @@ -377,6 +383,11 @@ static int suspend_enter(suspend_state_t if (error) goto Devices_early_resume; + if (state == PM_SUSPEND_FREEZE && pm_test_level != TEST_PLATFORM) { + s2idle_loop(); + goto Platform_early_resume; + } + error = dpm_suspend_noirq(PMSG_SUSPEND); if (error) { pr_err("PM: noirq suspend of devices failed\n"); @@ -389,17 +400,6 @@ static int suspend_enter(suspend_state_t if (suspend_test(TEST_PLATFORM)) goto Platform_wake; - /* - * PM_SUSPEND_FREEZE equals - * frozen processes + suspended devices + idle processors. - * Thus we should invoke freeze_enter() soon after - * all the devices are suspended. - */ - if (state == PM_SUSPEND_FREEZE) { - s2idle_loop(); - goto Platform_early_resume; - } - error = disable_nonboot_cpus(); if (error || suspend_test(TEST_CPUS)) goto Enable_cpus; Index: linux-pm/kernel/power/power.h =================================================================== --- linux-pm.orig/kernel/power/power.h +++ linux-pm/kernel/power/power.h @@ -245,7 +245,11 @@ enum { #define TEST_FIRST TEST_NONE #define TEST_MAX (__TEST_AFTER_LAST - 1) +#ifdef CONFIG_PM_DEBUG extern int pm_test_level; +#else +#define pm_test_level (TEST_NONE) +#endif #ifdef CONFIG_SUSPEND_FREEZER static inline int suspend_freeze_processes(void)
