diff options
| -rw-r--r-- | drivers/usb/gadget/function/u_serial.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c index bea936a6678b..e0b77946f013 100644 --- a/drivers/usb/gadget/function/u_serial.c +++ b/drivers/usb/gadget/function/u_serial.c @@ -1258,6 +1258,9 @@ static ssize_t debug_read_status(struct file *file, char __user *ubuf, int ret; int result = 0; + if (!ui_dev) + return -EINVAL; + tty = ui_dev->port.tty; gser = ui_dev->port_usb; @@ -1307,6 +1310,9 @@ static ssize_t debug_write_reset(struct file *file, const char __user *buf, struct gs_port *ui_dev = file->private_data; unsigned long flags; + if (!ui_dev) + return -EINVAL; + spin_lock_irqsave(&ui_dev->port_lock, flags); ui_dev->nbytes_from_host = ui_dev->nbytes_to_tty = ui_dev->nbytes_from_tty = ui_dev->nbytes_to_host = 0; @@ -1336,6 +1342,9 @@ static void usb_debugfs_init(struct gs_port *ui_dev, int port_num) { char buf[48]; + if (!ui_dev) + return; + snprintf(buf, 48, "usb_serial%d", port_num); gs_dent = debugfs_create_dir(buf, 0); if (!gs_dent || IS_ERR(gs_dent)) |