USB: serial: visor: fix crash on detecting device without write_urbs
[pandora-kernel.git] / drivers / usb / serial / siemens_mpi.c
1 /*
2  * Siemens USB-MPI Serial USB driver
3  *
4  * Copyright (C) 2005 Thomas Hergenhahn <thomas.hergenhahn@suse.de>
5  * Copyright (C) 2005,2008 Greg Kroah-Hartman <gregkh@suse.de>
6  *
7  *      This program is free software; you can redistribute it and/or
8  *      modify it under the terms of the GNU General Public License version
9  *      2 as published by the Free Software Foundation.
10  */
11
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/tty.h>
15 #include <linux/module.h>
16 #include <linux/usb.h>
17 #include <linux/usb/serial.h>
18
19 /* Version Information */
20 #define DRIVER_VERSION "Version 0.1 09/26/2005"
21 #define DRIVER_AUTHOR "Thomas Hergenhahn@web.de http://libnodave.sf.net"
22 #define DRIVER_DESC "Driver for Siemens USB/MPI adapter"
23
24
25 static const struct usb_device_id id_table[] = {
26         /* Vendor and product id for 6ES7-972-0CB20-0XA0 */
27         { USB_DEVICE(0x908, 0x0004) },
28         { },
29 };
30 MODULE_DEVICE_TABLE(usb, id_table);
31
32 static struct usb_driver siemens_usb_mpi_driver = {
33         .name =         "siemens_mpi",
34         .probe =        usb_serial_probe,
35         .disconnect =   usb_serial_disconnect,
36         .id_table =     id_table,
37 };
38
39 static struct usb_serial_driver siemens_usb_mpi_device = {
40         .driver = {
41                 .owner =        THIS_MODULE,
42                 .name =         "siemens_mpi",
43         },
44         .id_table =             id_table,
45         .usb_driver =           &siemens_usb_mpi_driver,
46         .num_ports =            1,
47 };
48
49 static int __init siemens_usb_mpi_init(void)
50 {
51         int retval;
52
53         retval = usb_serial_register(&siemens_usb_mpi_device);
54         if (retval)
55                 goto failed_usb_serial_register;
56         retval = usb_register(&siemens_usb_mpi_driver);
57         if (retval)
58                 goto failed_usb_register;
59         printk(KERN_INFO DRIVER_DESC "\n");
60         printk(KERN_INFO DRIVER_VERSION " " DRIVER_AUTHOR "\n");
61         return retval;
62 failed_usb_register:
63         usb_serial_deregister(&siemens_usb_mpi_device);
64 failed_usb_serial_register:
65         return retval;
66 }
67
68 static void __exit siemens_usb_mpi_exit(void)
69 {
70         usb_deregister(&siemens_usb_mpi_driver);
71         usb_serial_deregister(&siemens_usb_mpi_device);
72 }
73
74 module_init(siemens_usb_mpi_init);
75 module_exit(siemens_usb_mpi_exit);
76 MODULE_AUTHOR(DRIVER_AUTHOR);
77 MODULE_DESCRIPTION(DRIVER_DESC);
78 MODULE_LICENSE("GPL");