diff options
| -rw-r--r-- | drivers/tty/serial/8250/8250_omap.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 3ef65cbd2478..c68e2b3a1634 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -1234,7 +1234,16 @@ static int omap8250_probe(struct platform_device *pdev) device_init_wakeup(&pdev->dev, true); pm_runtime_use_autosuspend(&pdev->dev); - pm_runtime_set_autosuspend_delay(&pdev->dev, -1); + + /* + * Disable runtime PM until autosuspend delay unless specifically + * enabled by the user via sysfs. This is the historic way to + * prevent an unsafe default policy with lossy characters on wake-up. + * For serdev devices this is not needed, the policy can be managed by + * the serdev driver. + */ + if (!of_get_available_child_count(pdev->dev.of_node)) + pm_runtime_set_autosuspend_delay(&pdev->dev, -1); pm_runtime_irq_safe(&pdev->dev); pm_runtime_enable(&pdev->dev); |