diff options
| -rw-r--r-- | drivers/usb/serial/console.c | 17 | ||||
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 16 | ||||
| -rw-r--r-- | drivers/usb/serial/usb-serial.h | 3 |
3 files changed, 29 insertions, 7 deletions
diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c index fc4a0f731d91..f3404e10afb4 100644 --- a/drivers/usb/serial/console.c +++ b/drivers/usb/serial/console.c @@ -202,7 +202,7 @@ static void usb_console_write(struct console *co, const char *buf, unsigned coun struct usb_serial *serial; int retval = -ENODEV; - if (!port) + if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) return; serial = port->serial; @@ -255,6 +255,14 @@ static struct console usbcons = { .index = -1, }; +void usb_serial_console_disconnect(struct usb_serial *serial) +{ + if (serial && serial->port && serial->port[0] && serial->port[0] == usbcons_info.port) { + usb_serial_console_exit(); + usb_serial_put(serial); + } +} + void usb_serial_console_init (int serial_debug, int minor) { debug = serial_debug; @@ -280,6 +288,11 @@ void usb_serial_console_init (int serial_debug, int minor) void usb_serial_console_exit (void) { - unregister_console(&usbcons); + if (usbcons_info.port) { + unregister_console(&usbcons); + if (usbcons_info.port->open_count) + usbcons_info.port->open_count--; + usbcons_info.port = NULL; + } } diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index de9111d97a58..92200f05b531 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -168,6 +168,11 @@ static void destroy_serial(struct kref *kref) kfree (serial); } +void usb_serial_put(struct usb_serial *serial) +{ + kref_put(&serial->kref, destroy_serial); +} + /***************************************************************************** * Driver tty interface functions *****************************************************************************/ @@ -232,7 +237,7 @@ bailout_mutex_unlock: port->open_count = 0; mutex_unlock(&port->mutex); bailout_kref_put: - kref_put(&serial->kref, destroy_serial); + usb_serial_put(serial); return retval; } @@ -268,7 +273,7 @@ static void serial_close(struct tty_struct *tty, struct file * filp) } mutex_unlock(&port->mutex); - kref_put(&port->serial->kref, destroy_serial); + usb_serial_put(port->serial); } static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count) @@ -276,7 +281,7 @@ static int serial_write (struct tty_struct * tty, const unsigned char *buf, int struct usb_serial_port *port = tty->driver_data; int retval = -EINVAL; - if (!port) + if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED) goto exit; dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count); @@ -473,7 +478,7 @@ static int serial_read_proc (char *page, char **start, off_t off, int count, int begin += length; length = 0; } - kref_put(&serial->kref, destroy_serial); + usb_serial_put(serial); } *eof = 1; done: @@ -985,6 +990,7 @@ void usb_serial_disconnect(struct usb_interface *interface) struct device *dev = &interface->dev; struct usb_serial_port *port; + usb_serial_console_disconnect(serial); dbg ("%s", __FUNCTION__); usb_set_intfdata (interface, NULL); @@ -996,7 +1002,7 @@ void usb_serial_disconnect(struct usb_interface *interface) } /* let the last holder of this object * cause it to be cleaned up */ - kref_put(&serial->kref, destroy_serial); + usb_serial_put(serial); } dev_info(dev, "device disconnected\n"); } diff --git a/drivers/usb/serial/usb-serial.h b/drivers/usb/serial/usb-serial.h index dc89d8710460..c07ece3fef1d 100644 --- a/drivers/usb/serial/usb-serial.h +++ b/drivers/usb/serial/usb-serial.h @@ -248,13 +248,16 @@ extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit); #ifdef CONFIG_USB_SERIAL_CONSOLE extern void usb_serial_console_init (int debug, int minor); extern void usb_serial_console_exit (void); +extern void usb_serial_console_disconnect(struct usb_serial *serial); #else static inline void usb_serial_console_init (int debug, int minor) { } static inline void usb_serial_console_exit (void) { } +static inline void usb_serial_console_disconnect(struct usb_serial *serial) {} #endif /* Functions needed by other parts of the usbserial core */ extern struct usb_serial *usb_serial_get_by_index (unsigned int minor); +extern void usb_serial_put(struct usb_serial *serial); extern int usb_serial_generic_open (struct usb_serial_port *port, struct file *filp); extern int usb_serial_generic_write (struct usb_serial_port *port, const unsigned char *buf, int count); extern void usb_serial_generic_close (struct usb_serial_port *port, struct file *filp); |