diff options
Diffstat (limited to 'drivers/usb/serial/usb-serial.c')
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 071f86a59c0..9c36f0ece20 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -189,11 +189,15 @@ static int serial_open (struct tty_struct *tty, struct file * filp) portNumber = tty->index - serial->minor; port = serial->port[portNumber]; - if (!port) - return -ENODEV; + if (!port) { + retval = -ENODEV; + goto bailout_kref_put; + } - if (mutex_lock_interruptible(&port->mutex)) - return -ERESTARTSYS; + if (mutex_lock_interruptible(&port->mutex)) { + retval = -ERESTARTSYS; + goto bailout_kref_put; + } ++port->open_count; @@ -209,7 +213,7 @@ static int serial_open (struct tty_struct *tty, struct file * filp) * safe because we are called with BKL held */ if (!try_module_get(serial->type->driver.owner)) { retval = -ENODEV; - goto bailout_kref_put; + goto bailout_mutex_unlock; } /* only call the device specific open if this @@ -224,10 +228,11 @@ static int serial_open (struct tty_struct *tty, struct file * filp) bailout_module_put: module_put(serial->type->driver.owner); -bailout_kref_put: - kref_put(&serial->kref, destroy_serial); +bailout_mutex_unlock: port->open_count = 0; mutex_unlock(&port->mutex); +bailout_kref_put: + kref_put(&serial->kref, destroy_serial); return retval; } |