USB: suspend support for usb serial
this implements generic support for suspend/resume for usb serial.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 4f8282a..b90ef3f 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -69,6 +69,7 @@
.shutdown = usb_serial_generic_shutdown,
.throttle = usb_serial_generic_throttle,
.unthrottle = usb_serial_generic_unthrottle,
+ .resume = usb_serial_generic_resume,
};
static int generic_probe(struct usb_interface *interface,
@@ -169,6 +170,23 @@
}
}
+int usb_serial_generic_resume(struct usb_serial *serial)
+{
+ struct usb_serial_port *port;
+ int i, c = 0, r;
+
+ for (i = 0; i < serial->num_ports; i++) {
+ port = serial->port[i];
+ if (port->open_count && port->read_urb) {
+ r = usb_submit_urb(port->read_urb, GFP_NOIO);
+ if (r < 0)
+ c++;
+ }
+ }
+
+ return c ? -EIO : 0;
+}
+
void usb_serial_generic_close (struct usb_serial_port *port, struct file * filp)
{
dbg("%s - port %d", __FUNCTION__, port->number);