From ca4383a3947a83286bc9b9c598a1f55e867871d7 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 18 Feb 2015 10:34:51 +0700 Subject: [PATCH] USB: serial: fix tty-device error handling at probe Add missing error handling when registering the tty device at port probe. This avoids trying to remove an uninitialised character device when the port device is removed. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: Takashi Iwai Cc: stable # v2.6.12 Signed-off-by: Johan Hovold Acked-by: Greg Kroah-Hartman --- drivers/usb/serial/bus.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c index 5d8d86666b90..6f91eb9ae81a 100644 --- a/drivers/usb/serial/bus.c +++ b/drivers/usb/serial/bus.c @@ -51,6 +51,7 @@ static int usb_serial_device_probe(struct device *dev) { struct usb_serial_driver *driver; struct usb_serial_port *port; + struct device *tty_dev; int retval = 0; int minor; @@ -80,7 +81,15 @@ static int usb_serial_device_probe(struct device *dev) } minor = port->minor; - tty_register_device(usb_serial_tty_driver, minor, dev); + tty_dev = tty_register_device(usb_serial_tty_driver, minor, dev); + if (IS_ERR(tty_dev)) { + retval = PTR_ERR(tty_dev); + device_remove_file(dev, &dev_attr_port_number); + if (driver->port_remove) + driver->port_remove(port); + goto exit_with_autopm; + } + dev_info(&port->serial->dev->dev, "%s converter now attached to ttyUSB%d\n", driver->description, minor); -- 2.20.1