1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index 172713556393..21cbaa0fb96b 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -175,14 +175,14 @@ int usb_serial_generic_write(struct usb_serial_port *port, const unsigned char *
 
         /* only do something if we have a bulk out endpoint */
         if (serial->num_bulk_out) {
-                spin_lock(&port->lock);
+                spin_lock_bh(&port->lock);
                 if (port->write_urb_busy) {
-                        spin_unlock(&port->lock);
+                        spin_unlock_bh(&port->lock);
                         dbg("%s - already writing", __FUNCTION__);
                         return 0;
                 }
                 port->write_urb_busy = 1;
-                spin_unlock(&port->lock);
+                spin_unlock_bh(&port->lock);
 
                 count = (count > port->bulk_out_size) ? port->bulk_out_size : count;