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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-21 02:07:54 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-07-24 23:53:44 +0200 |
| commit | 8e6bcd9f7eac47104ce6c5d82c554c9b244b38e1 (patch) | |
| tree | 74a789ae4c8825bb513a1a8e75c6613dbace2208 /kernel/power | |
| parent | PM / timekeeping: Print debug messages when requested (diff) | |
| download | linux-8e6bcd9f7eac47104ce6c5d82c554c9b244b38e1.tar.xz linux-8e6bcd9f7eac47104ce6c5d82c554c9b244b38e1.zip | |
PM / s2idle: Rearrange the main suspend-to-idle loop
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 <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/power.h | 4 | ||||
| -rw-r--r-- | kernel/power/suspend.c | 26 |
2 files changed, 17 insertions, 13 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h index 7fdc40d31b7d..6e3ac6a73d65 100644 --- a/kernel/power/power.h +++ b/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) diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 18cdb1596d27..0c61713b6e5c 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -108,7 +108,13 @@ 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) @@ -122,7 +128,7 @@ 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"); } @@ -379,6 +385,11 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) 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"); @@ -391,17 +402,6 @@ static int suspend_enter(suspend_state_t state, bool *wakeup) 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; |