Commit e98eac6f authored by Thomas Gleixner's avatar Thomas Gleixner

cpu/hotplug: Ignore pm_wakeup_pending() for disable_nonboot_cpus()

A recent change to freeze_secondary_cpus() which added an early abort if a
wakeup is pending missed the fact that the function is also invoked for
shutdown, reboot and kexec via disable_nonboot_cpus().

In case of disable_nonboot_cpus() the wakeup event needs to be ignored as
the purpose is to terminate the currently running kernel.

Add a 'suspend' argument which is only set when the freeze is in context of
a suspend operation. If not set then an eventually pending wakeup event is
ignored.

Fixes: a66d955e ("cpu/hotplug: Abort disabling secondary CPUs if wakeup is pending")
Reported-by: default avatarBoqun Feng <boqun.feng@gmail.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Pavankumar Kondeti <pkondeti@codeaurora.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/874kuaxdiz.fsf@nanos.tec.linutronix.de
parent 33c3736e
...@@ -144,12 +144,18 @@ static inline void get_online_cpus(void) { cpus_read_lock(); } ...@@ -144,12 +144,18 @@ static inline void get_online_cpus(void) { cpus_read_lock(); }
static inline void put_online_cpus(void) { cpus_read_unlock(); } static inline void put_online_cpus(void) { cpus_read_unlock(); }
#ifdef CONFIG_PM_SLEEP_SMP #ifdef CONFIG_PM_SLEEP_SMP
extern int freeze_secondary_cpus(int primary); int __freeze_secondary_cpus(int primary, bool suspend);
static inline int freeze_secondary_cpus(int primary)
{
return __freeze_secondary_cpus(primary, true);
}
static inline int disable_nonboot_cpus(void) static inline int disable_nonboot_cpus(void)
{ {
return freeze_secondary_cpus(0); return __freeze_secondary_cpus(0, false);
} }
extern void enable_nonboot_cpus(void);
void enable_nonboot_cpus(void);
static inline int suspend_disable_secondary_cpus(void) static inline int suspend_disable_secondary_cpus(void)
{ {
......
...@@ -1327,7 +1327,7 @@ void bringup_nonboot_cpus(unsigned int setup_max_cpus) ...@@ -1327,7 +1327,7 @@ void bringup_nonboot_cpus(unsigned int setup_max_cpus)
#ifdef CONFIG_PM_SLEEP_SMP #ifdef CONFIG_PM_SLEEP_SMP
static cpumask_var_t frozen_cpus; static cpumask_var_t frozen_cpus;
int freeze_secondary_cpus(int primary) int __freeze_secondary_cpus(int primary, bool suspend)
{ {
int cpu, error = 0; int cpu, error = 0;
...@@ -1352,7 +1352,7 @@ int freeze_secondary_cpus(int primary) ...@@ -1352,7 +1352,7 @@ int freeze_secondary_cpus(int primary)
if (cpu == primary) if (cpu == primary)
continue; continue;
if (pm_wakeup_pending()) { if (suspend && pm_wakeup_pending()) {
pr_info("Wakeup pending. Abort CPU freeze\n"); pr_info("Wakeup pending. Abort CPU freeze\n");
error = -EBUSY; error = -EBUSY;
break; break;
......
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