staging: ozwpan: udev support

Register ozmo_wpan class with sysfs & support for udev
to create device node.

Signed-off-by: Rupesh Gujare <rgujare@ozmodevices.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/ozwpan/ozcdev.c b/drivers/staging/ozwpan/ozcdev.c
index 27325f74ecdc3dd4faf0110a36d993ed09f98365..929756abf02c007554be5218af356779d4593100 100644 (file)
--- a/drivers/staging/ozwpan/ozcdev.c
+++ b/drivers/staging/ozwpan/ozcdev.c
@@ -330,10 +330,12 @@ const struct file_operations oz_fops = {
 int oz_cdev_register(void)
 {
        int err;
+       struct class *cl;
+       struct device *dev;
        memset(&g_cdev, 0, sizeof(g_cdev));
        err = alloc_chrdev_region(&g_cdev.devnum, 0, 1, "ozwpan");
        if (err < 0)
-               return err;
+               goto out3;
        oz_trace("Alloc dev number %d:%d\n", MAJOR(g_cdev.devnum),
                        MINOR(g_cdev.devnum));
        cdev_init(&g_cdev.cdev, &oz_fops);
@@ -342,7 +344,27 @@ int oz_cdev_register(void)
        spin_lock_init(&g_cdev.lock);
        init_waitqueue_head(&g_cdev.rdq);
        err = cdev_add(&g_cdev.cdev, g_cdev.devnum, 1);
+       if (err < 0) {
+               oz_trace("Failed to add cdev\n");
+               goto out2;
+       }
+       cl = class_create(THIS_MODULE, "ozmo_wpan");
+       if (IS_ERR(cl)) {
+               oz_trace("Failed to register ozmo_wpan class\n");
+               goto out1;
+       }
+       dev = device_create(cl, NULL, g_cdev.devnum, NULL, "ozwpan");
+       if (IS_ERR(dev)) {
+               oz_trace("Failed to create sysfs entry for cdev\n");
+               goto out1;
+       }
        return 0;
+out1:
+       cdev_del(&g_cdev.cdev);
+out2:
+       unregister_chrdev_region(g_cdev.devnum, 1);
+out3:
+       return err;
 }
 /*------------------------------------------------------------------------------
  * Context: process