At the momemnt the usb-port driver has only runime_pm hooks. Suspending the port and turn off the VBUS supply should be triggered by the hub device suspend callback usb_port_suspend() which calls the pm_runtime_put_sync() if all pre-conditions are meet. This mechanism don't work correctly due to the global PM behaviour, for more information see [1]. According [1] I added the suspend/resume callbacks for the port device to fix this. [1] https://www.spinics.net/lists/linux-usb/msg190537.html Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx> --- Hi, this v2 contains the fixes Reported-by: kbuild test robot <lkp@xxxxxxxxx> Regards, Marco Changes: - init retval to zero - keep CONFIG_PM due to do_remote_wakeup availability - adapt commit message drivers/usb/core/hub.c | 13 ------------- drivers/usb/core/port.c | 35 ++++++++++++++++++++++++++++++----- 2 files changed, 30 insertions(+), 18 deletions(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 3405b146edc9..c294484e478d 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3323,10 +3323,6 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg) usb_set_device_state(udev, USB_STATE_SUSPENDED); } - if (status == 0 && !udev->do_remote_wakeup && udev->persist_enabled - && test_and_clear_bit(port1, hub->child_usage_bits)) - pm_runtime_put_sync(&port_dev->dev); - usb_mark_last_busy(hub->hdev); usb_unlock_port(port_dev); @@ -3514,15 +3510,6 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) int status; u16 portchange, portstatus; - if (!test_and_set_bit(port1, hub->child_usage_bits)) { - status = pm_runtime_get_sync(&port_dev->dev); - if (status < 0) { - dev_dbg(&udev->dev, "can't resume usb port, status %d\n", - status); - return status; - } - } - usb_lock_port(port_dev); /* Skip the initial Clear-Suspend step for a remote wakeup */ diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c index bbbb35fa639f..13f130b67efe 100644 --- a/drivers/usb/core/port.c +++ b/drivers/usb/core/port.c @@ -283,7 +283,34 @@ static int usb_port_runtime_suspend(struct device *dev) return retval; } -#endif + +static int __maybe_unused _usb_port_suspend(struct device *dev) +{ + struct usb_port *port_dev = to_usb_port(dev); + struct usb_device *udev = port_dev->child; + int retval = 0; + + if (!udev->do_remote_wakeup && udev->persist_enabled) + retval = usb_port_runtime_suspend(dev); + + /* Do not force the user to enable the power-off feature */ + if (retval && retval != -EAGAIN) + return retval; + + return 0; +} + +static int __maybe_unused _usb_port_resume(struct device *dev) +{ + struct usb_port *port_dev = to_usb_port(dev); + struct usb_device *udev = port_dev->child; + + if (!udev->do_remote_wakeup && udev->persist_enabled) + return usb_port_runtime_resume(dev); + + return 0; +} +#endif /* CONFIG_PM */ static void usb_port_shutdown(struct device *dev) { @@ -294,10 +321,8 @@ static void usb_port_shutdown(struct device *dev) } static const struct dev_pm_ops usb_port_pm_ops = { -#ifdef CONFIG_PM - .runtime_suspend = usb_port_runtime_suspend, - .runtime_resume = usb_port_runtime_resume, -#endif + SET_SYSTEM_SLEEP_PM_OPS(_usb_port_suspend, _usb_port_resume) + SET_RUNTIME_PM_OPS(usb_port_runtime_suspend, usb_port_runtime_resume, NULL) }; struct device_type usb_port_device_type = { -- 2.20.1
