diff options
| -rw-r--r-- | drivers/usb/gadget/function/f_cdev.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/f_cdev.c b/drivers/usb/gadget/function/f_cdev.c index 0a9a3afd72dd..b22ea656367e 100644 --- a/drivers/usb/gadget/function/f_cdev.c +++ b/drivers/usb/gadget/function/f_cdev.c @@ -529,6 +529,14 @@ static int usb_cser_notify(struct f_cdev *port, u8 type, u16 value, const unsigned len = sizeof(*notify) + length; void *buf; int status; + unsigned long flags; + + spin_lock_irqsave(&port->port_lock, flags); + if (!port->is_connected) { + spin_unlock_irqrestore(&port->port_lock, flags); + pr_debug("%s: port disconnected\n", __func__); + return -ENODEV; + } req = port->port_usb.notify_req; port->port_usb.notify_req = NULL; @@ -544,7 +552,9 @@ static int usb_cser_notify(struct f_cdev *port, u8 type, u16 value, notify->wValue = cpu_to_le16(value); notify->wIndex = cpu_to_le16(port->port_usb.data_id); notify->wLength = cpu_to_le16(length); + /* 2 byte data copy */ memcpy(buf, data, length); + spin_unlock_irqrestore(&port->port_lock, flags); status = usb_ep_queue(ep, req, GFP_ATOMIC); if (status < 0) { |