int acpi_register_lps0_dev(struct acpi_s2idle_dev_ops *arg)
{
+ unsigned int sleep_flags;
+
if (!lps0_device_handle || sleep_no_lps0)
return -ENODEV;
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
list_add(&arg->list_node, &lps0_s2idle_devops_head);
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
return 0;
}
void acpi_unregister_lps0_dev(struct acpi_s2idle_dev_ops *arg)
{
+ unsigned int sleep_flags;
+
if (!lps0_device_handle || sleep_no_lps0)
return;
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
list_del(&arg->list_node);
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
}
EXPORT_SYMBOL_GPL(acpi_unregister_lps0_dev);
spi_dv_device(struct scsi_device *sdev)
{
struct scsi_target *starget = sdev->sdev_target;
- u8 *buffer;
const int len = SPI_MAX_ECHO_BUFFER_SIZE*2;
+ unsigned int sleep_flags;
+ u8 *buffer;
/*
* Because this function and the power management code both call
* while suspend or resume is in progress. Hence the
* lock/unlock_system_sleep() calls.
*/
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
if (scsi_autopm_get_device(sdev))
goto unlock_system_sleep;
scsi_autopm_put_device(sdev);
unlock_system_sleep:
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
}
EXPORT_SYMBOL(spi_dv_device);
extern void pm_wakep_autosleep_enabled(bool set);
extern void pm_print_active_wakeup_sources(void);
-extern void lock_system_sleep(void);
-extern void unlock_system_sleep(void);
+extern unsigned int lock_system_sleep(void);
+extern void unlock_system_sleep(unsigned int);
#else /* !CONFIG_PM_SLEEP */
static inline void pm_wakeup_clear(bool reset) {}
static inline void pm_system_irq_wakeup(unsigned int irq_number) {}
-static inline void lock_system_sleep(void) {}
-static inline void unlock_system_sleep(void) {}
+static inline unsigned int lock_system_sleep(void) { return 0; }
+static inline void unlock_system_sleep(unsigned int flags) {}
#endif /* !CONFIG_PM_SLEEP */
*/
void hibernation_set_ops(const struct platform_hibernation_ops *ops)
{
+ unsigned int sleep_flags;
+
if (ops && !(ops->begin && ops->end && ops->pre_snapshot
&& ops->prepare && ops->finish && ops->enter && ops->pre_restore
&& ops->restore_cleanup && ops->leave)) {
WARN_ON(1);
return;
}
- lock_system_sleep();
+
+ sleep_flags = lock_system_sleep();
+
hibernation_ops = ops;
if (ops)
hibernation_mode = HIBERNATION_PLATFORM;
else if (hibernation_mode == HIBERNATION_PLATFORM)
hibernation_mode = HIBERNATION_SHUTDOWN;
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
}
EXPORT_SYMBOL_GPL(hibernation_set_ops);
int hibernate(void)
{
bool snapshot_test = false;
+ unsigned int sleep_flags;
int error;
if (!hibernation_available()) {
return -EPERM;
}
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
/* The snapshot device should not be opened while we're running */
if (!hibernate_acquire()) {
error = -EBUSY;
pm_restore_console();
hibernate_release();
Unlock:
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
pr_info("hibernation exit\n");
return error;
*/
int hibernate_quiet_exec(int (*func)(void *data), void *data)
{
+ unsigned int sleep_flags;
int error;
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
if (!hibernate_acquire()) {
error = -EBUSY;
hibernate_release();
unlock:
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
return error;
}
static ssize_t disk_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t n)
{
+ int mode = HIBERNATION_INVALID;
+ unsigned int sleep_flags;
int error = 0;
- int i;
int len;
char *p;
- int mode = HIBERNATION_INVALID;
+ int i;
if (!hibernation_available())
return -EPERM;
p = memchr(buf, '\n', n);
len = p ? p - buf : n;
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
for (i = HIBERNATION_FIRST; i <= HIBERNATION_MAX; i++) {
if (len == strlen(hibernation_modes[i])
&& !strncmp(buf, hibernation_modes[i], len)) {
if (!error)
pm_pr_dbg("Hibernation mode set to '%s'\n",
hibernation_modes[mode]);
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
return error ? error : n;
}
static ssize_t resume_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t n)
{
- dev_t res;
+ unsigned int sleep_flags;
int len = n;
char *name;
+ dev_t res;
if (len && buf[len-1] == '\n')
len--;
if (!res)
return -EINVAL;
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
swsusp_resume_device = res;
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
+
pm_pr_dbg("Configured hibernation resume from disk to %u\n",
swsusp_resume_device);
noresume = 0;
#ifdef CONFIG_PM_SLEEP
-void lock_system_sleep(void)
+unsigned int lock_system_sleep(void)
{
+ unsigned int flags = current->flags;
current->flags |= PF_FREEZER_SKIP;
mutex_lock(&system_transition_mutex);
+ return flags;
}
EXPORT_SYMBOL_GPL(lock_system_sleep);
-void unlock_system_sleep(void)
+void unlock_system_sleep(unsigned int flags)
{
/*
* Don't use freezer_count() because we don't want the call to
* Which means, if we use try_to_freeze() here, it would make them
* enter the refrigerator, thus causing hibernation to lockup.
*/
- current->flags &= ~PF_FREEZER_SKIP;
+ if (!(flags & PF_FREEZER_SKIP))
+ current->flags &= ~PF_FREEZER_SKIP;
mutex_unlock(&system_transition_mutex);
}
EXPORT_SYMBOL_GPL(unlock_system_sleep);
static ssize_t pm_test_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t n)
{
+ unsigned int sleep_flags;
const char * const *s;
+ int error = -EINVAL;
int level;
char *p;
int len;
- int error = -EINVAL;
p = memchr(buf, '\n', n);
len = p ? p - buf : n;
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
level = TEST_FIRST;
for (s = &pm_tests[level]; level <= TEST_MAX; s++, level++)
break;
}
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
return error ? error : n;
}
void s2idle_set_ops(const struct platform_s2idle_ops *ops)
{
- lock_system_sleep();
+ unsigned int sleep_flags;
+
+ sleep_flags = lock_system_sleep();
s2idle_ops = ops;
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
}
static void s2idle_begin(void)
*/
void suspend_set_ops(const struct platform_suspend_ops *ops)
{
- lock_system_sleep();
+ unsigned int sleep_flags;
+
+ sleep_flags = lock_system_sleep();
suspend_ops = ops;
mem_sleep_current = PM_SUSPEND_MEM;
}
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
}
EXPORT_SYMBOL_GPL(suspend_set_ops);
static int snapshot_open(struct inode *inode, struct file *filp)
{
struct snapshot_data *data;
+ unsigned int sleep_flags;
int error;
if (!hibernation_available())
return -EPERM;
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
if (!hibernate_acquire()) {
error = -EBUSY;
data->dev = 0;
Unlock:
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
return error;
}
static int snapshot_release(struct inode *inode, struct file *filp)
{
struct snapshot_data *data;
+ unsigned int sleep_flags;
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
swsusp_free();
data = filp->private_data;
PM_POST_HIBERNATION : PM_POST_RESTORE);
hibernate_release();
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
return 0;
}
static ssize_t snapshot_read(struct file *filp, char __user *buf,
size_t count, loff_t *offp)
{
+ loff_t pg_offp = *offp & ~PAGE_MASK;
struct snapshot_data *data;
+ unsigned int sleep_flags;
ssize_t res;
- loff_t pg_offp = *offp & ~PAGE_MASK;
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
data = filp->private_data;
if (!data->ready) {
*offp += res;
Unlock:
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
return res;
}
static ssize_t snapshot_write(struct file *filp, const char __user *buf,
size_t count, loff_t *offp)
{
+ loff_t pg_offp = *offp & ~PAGE_MASK;
struct snapshot_data *data;
+ unsigned long sleep_flags;
ssize_t res;
- loff_t pg_offp = *offp & ~PAGE_MASK;
if (need_wait) {
wait_for_device_probe();
need_wait = false;
}
- lock_system_sleep();
+ sleep_flags = lock_system_sleep();
data = filp->private_data;
if (res > 0)
*offp += res;
unlock:
- unlock_system_sleep();
+ unlock_system_sleep(sleep_flags);
return res;
}