diff options
Diffstat (limited to 'drivers/usb/gadget/function/u_serial.c')
| -rw-r--r-- | drivers/usb/gadget/function/u_serial.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c index 99c486264..a91fe6476 100644 --- a/drivers/usb/gadget/function/u_serial.c +++ b/drivers/usb/gadget/function/u_serial.c @@ -375,10 +375,15 @@ __acquires(&port->port_lock) */ { struct list_head *pool = &port->write_pool; - struct usb_ep *in = port->port_usb->in; + struct usb_ep *in; int status = 0; bool do_tty_wake = false; + if (!port->port_usb) + return status; + + in = port->port_usb->in; + while (!port->write_busy && !list_empty(pool)) { struct usb_request *req; int len; @@ -907,7 +912,6 @@ static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count) { struct gs_port *port = tty->driver_data; unsigned long flags; - int status; pr_vdebug("gs_write: ttyGS%d (%p) writing %d bytes\n", port->port_num, tty, count); @@ -917,7 +921,7 @@ static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count) count = gs_buf_put(&port->port_write_buf, buf, count); /* treat count == 0 as flush_chars() */ if (port->port_usb) - status = gs_start_tx(port); + gs_start_tx(port); spin_unlock_irqrestore(&port->port_lock, flags); return count; |