[PATCH] pcmcia: CM4000, CM4040 Driver fixes

Using this patch, Omnikey CardMan 4000 and 4040 devices automatically
get their device nodes created by udev.

Also, we now check for (and handle) failure of pcmcia_register_driver()

Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

1 files changed, 20 insertions, 3 deletions

diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
index 46eb371bf17e..466e33bab029 100644
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ b/drivers/char/pcmcia/cm4040_cs.c
@@ -3,12 +3,13 @@
  *
  * (c) 2000-2004 Omnikey AG (http://www.omnikey.com/)
  *
- * (C) 2005 Harald Welte <laforge@gnumonks.org>
+ * (C) 2005-2006 Harald Welte <laforge@gnumonks.org>
  *      - add support for poll()
  *      - driver cleanup
  *      - add waitqueues
  *      - adhere to linux kernel coding style and policies
  *      - support 2.6.13 "new style" pcmcia interface
+ *      - add class interface for udev device creation
  *
  * The device basically is a USB CCID compliant device that has been
  * attached to an I/O-Mapped FIFO.
@@ -53,7 +54,7 @@ module_param(pc_debug, int, 0600);
 #endif
 
 static char *version =
-"OMNIKEY CardMan 4040 v1.1.0gm4 - All bugs added by Harald Welte";
+"OMNIKEY CardMan 4040 v1.1.0gm5 - All bugs added by Harald Welte";
 
 #define CCID_DRIVER_BULK_DEFAULT_TIMEOUT        (150*HZ)
 #define CCID_DRIVER_ASYNC_POWERUP_TIMEOUT       (35*HZ)
@@ -67,6 +68,7 @@ static char *version =
 static void reader_release(dev_link_t *link);
 
 static int major;
+static struct class *cmx_class;
 
 #define         BS_READABLE     0x01
 #define         BS_WRITABLE     0x02
@@ -696,6 +698,9 @@ static int reader_attach(struct pcmcia_device *p_dev)
         link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
         reader_config(link, i);
 
+        class_device_create(cmx_class, NULL, MKDEV(major, i), NULL,
+                            "cmx%d", i);
+
         return 0;
 }
 
@@ -721,6 +726,8 @@ static void reader_detach(struct pcmcia_device *p_dev)
         dev_table[devno] = NULL;
         kfree(dev);
 
+        class_device_destroy(cmx_class, MKDEV(major, devno));
+
         return;
 }
 
@@ -755,8 +762,17 @@ static struct pcmcia_driver reader_driver = {
 
 static int __init cm4040_init(void)
 {
+        int rc;
+
         printk(KERN_INFO "%s\n", version);
-        pcmcia_register_driver(&reader_driver);
+        cmx_class = class_create(THIS_MODULE, "cardman_4040");
+        if (!cmx_class)
+                return -1;
+
+        rc = pcmcia_register_driver(&reader_driver);
+        if (rc < 0)
+                return rc;
+
         major = register_chrdev(0, DEVICE_NAME, &reader_fops);
         if (major < 0) {
                 printk(KERN_WARNING MODULE_NAME
@@ -771,6 +787,7 @@ static void __exit cm4040_exit(void)
         printk(KERN_INFO MODULE_NAME ": unloading\n");
         pcmcia_unregister_driver(&reader_driver);
         unregister_chrdev(major, DEVICE_NAME);
+        class_destroy(cmx_class);
 }
 
 module_init(cm4040_init);