usb: hub: Don't wait for connect state at resume for powered-off ports

wait_for_connected() wait till a port change status to
USB_PORT_STAT_CONNECTION, but this is not possible if
the port is unpowered. The loop will only exit at timeout.

Such case take place if an over-current incident happen
while system is in S3. Then during resume wait_for_connected()
will wait 2s, which may be noticeable by the user.

Signed-off-by: Dominik Bozek <dominikx.bozek@intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index f6ea16e..9e79bcf 100644 (file)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3371,6 +3371,10 @@ static int wait_for_connected(struct usb_device *udev,
        while (delay_ms < 2000) {
                if (status || *portstatus & USB_PORT_STAT_CONNECTION)
                        break;
+               if (!port_is_power_on(hub, *portstatus)) {
+                       status = -ENODEV;
+                       break;
+               }
                msleep(20);
                delay_ms += 20;
                status = hub_port_status(hub, *port1, portstatus, portchange);