1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index ddde5fb13f6b..5f7d3193d355 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -223,7 +223,7 @@ int usb_serial_generic_write_room (struct usb_serial_port *port)
         dbg("%s - port %d", __FUNCTION__, port->number);
 
         if (serial->num_bulk_out) {
-                if (port->write_urb_busy)
+                if (!(port->write_urb_busy))
                         room = port->bulk_out_size;
         }