USB: serial: use generic method if no alternative is provided in usb serial layer

This patch makes use of the generic method if a serial driver provides
no implementation. This simplifies implementing suspend/resume support
in serial drivers.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index c6aaa6d..18f9408 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1085,12 +1085,15 @@ EXPORT_SYMBOL(usb_serial_suspend);
 int usb_serial_resume(struct usb_interface *intf)
 {
        struct usb_serial *serial = usb_get_intfdata(intf);
+       int rv;
 
        serial->suspending = 0;
        if (serial->type->resume)
-               return serial->type->resume(serial);
+               rv = serial->type->resume(serial);
+       else
+               rv = usb_serial_generic_resume(serial);
 
-       return 0;
+       return rv;
 }
 EXPORT_SYMBOL(usb_serial_resume);