diff options
Diffstat (limited to 'drivers/usb/serial/usb-serial.c')
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index a84216464ca0..c6f69c0f0eb4 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -21,6 +21,7 @@ #include <linux/errno.h> #include <linux/init.h> #include <linux/slab.h> +#include <linux/smp_lock.h> #include <linux/tty.h> #include <linux/tty_driver.h> #include <linux/tty_flip.h> @@ -213,14 +214,13 @@ static int serial_open (struct tty_struct *tty, struct file *filp) goto bailout_port_put; } - ++port->port.count; - /* set up our port structure making the tty driver * remember our port object, and us it */ tty->driver_data = port; tty_port_tty_set(&port->port, tty); - if (port->port.count == 1) { + /* If the console is attached, the device is already open */ + if (!port->port.count && !port->console) { /* lock this module before we call it * this may fail, which means we must bail out, @@ -238,12 +238,16 @@ static int serial_open (struct tty_struct *tty, struct file *filp) if (retval) goto bailout_module_put; + ++port->port.count; + /* only call the device specific open if this * is the first time the port is opened */ retval = serial->type->open(tty, port, filp); if (retval) goto bailout_interface_put; mutex_unlock(&serial->disc_mutex); + } else { + ++port->port.count; } mutex_unlock(&port->mutex); /* Now do the correct tty layer semantics */ |