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Commit ca4383a3 authored by Johan Hovold's avatar Johan Hovold
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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: 1da177e4 ("Linux-2.6.12-rc2")
Reported-by: default avatarTakashi Iwai <tiwai@suse.de>
Cc: stable <stable@vger.kernel.org>	# v2.6.12
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Acked-by: default avatarGreg Kroah-Hartman <greg@kroah.com>
parent 07fdfc5e

drivers/usb/serial/bus.c

+10 −1
Original line number Diff line number Diff line
@@ -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);