/** * suspend_devices_and_enter - suspend devices and enter the desired system sleep * state. * @state: state to enter */ int suspend_devices_and_enter(suspend_state_t state) { int error; if (!pm_ops) return -ENOSYS; if (pm_ops->set_target) { error = pm_ops->set_target(state); if (error) return error; } suspend_console(); error = device_suspend(PMSG_SUSPEND); if (error) { printk(KERN_ERR "Some devices failed to suspend\n"); goto Resume_console; } if (pm_ops->prepare) { error = pm_ops->prepare(state); if (error) goto Resume_devices; } error = disable_nonboot_cpus(); if (!error) suspend_enter(state); enable_nonboot_cpus(); pm_finish(state); Resume_devices: device_resume(); Resume_console: resume_console(); return error; }
static void s3c_pm_finish(void) { if (pm_finish) pm_finish(); s3c_pm_check_cleanup(); enable_hlt(); }
static void suspend_finish(suspend_state_t state) { enable_nonboot_cpus(); pm_finish(state); device_resume(); resume_console(); thaw_processes(); pm_restore_console(); }
static void s3c_pm_finish(void) { if (pm_finish) pm_finish(); s3c_pm_check_cleanup(); #if defined(CONFIG_MACH_P8LTE) \ || defined(CONFIG_MACH_U1_NA_SPR) enable_hlt(); #endif }
static int suspend_prepare(suspend_state_t state) { int error; unsigned int free_pages; if (!pm_ops || !pm_ops->enter) return -EPERM; pm_prepare_console(); if (freeze_processes()) { error = -EAGAIN; goto Thaw; } if ((free_pages = global_page_state(NR_FREE_PAGES)) < FREE_PAGE_NUMBER) { pr_debug("PM: free some memory\n"); shrink_all_memory(FREE_PAGE_NUMBER - free_pages); if (nr_free_pages() < FREE_PAGE_NUMBER) { error = -ENOMEM; printk(KERN_ERR "PM: No enough memory\n"); goto Thaw; } } if (pm_ops->prepare) { if ((error = pm_ops->prepare(state))) goto Thaw; } suspend_console(); error = device_suspend(PMSG_SUSPEND); if (error) { printk(KERN_ERR "Some devices failed to suspend\n"); goto Resume_devices; } error = disable_nonboot_cpus(); if (!error) return 0; enable_nonboot_cpus(); Resume_devices: pm_finish(state); device_resume(); resume_console(); Thaw: thaw_processes(); pm_restore_console(); return error; }