From 73e487fdb75f8abf230968dbf73a3dc3b16808d3 Mon Sep 17 00:00:00 2001 From: Guennadi Liakhovetski Date: Tue, 25 Apr 2006 07:46:17 +0200 Subject: [PATCH] USB console: fix disconnection issues Prevent sending further output to a USB-serial console after the dongle is disconnected, take care not to leak kref. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/console.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) (limited to 'drivers/usb/serial/console.c') diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c index fc4a0f731d9..f3404e10afb 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; + } } -- cgit v1.2.3-70-g09d2