/** * suspend_devices_and_enter - Suspend devices and enter system sleep state. * @state: System sleep state to enter. */ int suspend_devices_and_enter(suspend_state_t state) { int error; bool wakeup = false; if (need_suspend_ops(state) && !suspend_ops) return -ENOSYS; trace_machine_suspend(state); if (need_suspend_ops(state) && suspend_ops->begin) { error = suspend_ops->begin(state); if (error) goto Close; } else if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->begin) { error = freeze_ops->begin(); if (error) goto Close; } suspend_console(); ftrace_stop(); suspend_test_start(); error = dpm_suspend_start(PMSG_SUSPEND); if (error) { printk(KERN_ERR "PM: Some devices failed to suspend\n"); log_suspend_abort_reason("Some devices failed to suspend"); goto Recover_platform; } suspend_test_finish("suspend devices"); if (suspend_test(TEST_DEVICES)) goto Recover_platform; do { error = suspend_enter(state, &wakeup); } while (!error && !wakeup && need_suspend_ops(state) && platform_suspend_again()); Resume_devices: suspend_test_start(); dpm_resume_end(PMSG_RESUME); suspend_test_finish("resume devices"); ftrace_start(); resume_console(); Close: if (need_suspend_ops(state) && suspend_ops->end) suspend_ops->end(); else if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->end) freeze_ops->end(); trace_machine_suspend(PWR_EVENT_EXIT); return error; Recover_platform: if (need_suspend_ops(state) && suspend_ops->recover) suspend_ops->recover(); goto Resume_devices; }
/** * suspend_devices_and_enter - Suspend devices and enter system sleep state. * @state: System sleep state to enter. */ int suspend_devices_and_enter(suspend_state_t state) { int error; bool wakeup = false; if (!sleep_state_supported(state)) return -ENOSYS; pm_suspend_target_state = state; error = platform_suspend_begin(state); if (error) goto Close; suspend_console(); suspend_test_start(); error = dpm_suspend_start(PMSG_SUSPEND); if (error) { pr_err("Some devices failed to suspend, or early wake event detected\n"); goto Recover_platform; } suspend_test_finish("suspend devices"); if (suspend_test(TEST_DEVICES)) goto Recover_platform; do { error = suspend_enter(state, &wakeup); } while (!error && !wakeup && platform_suspend_again(state)); Resume_devices: suspend_test_start(); dpm_resume_end(PMSG_RESUME); suspend_test_finish("resume devices"); trace_suspend_resume(TPS("resume_console"), state, true); resume_console(); trace_suspend_resume(TPS("resume_console"), state, false); Close: platform_resume_end(state); pm_suspend_target_state = PM_SUSPEND_ON; return error; Recover_platform: platform_recover(state); goto Resume_devices; }