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path: root/drivers/staging/comedi/comedi_fops.c
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Diffstat (limited to 'drivers/staging/comedi/comedi_fops.c')
-rw-r--r--drivers/staging/comedi/comedi_fops.c42
1 files changed, 22 insertions, 20 deletions
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index f191c2a75732..ca11be21f64b 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -2881,29 +2881,25 @@ static int __init comedi_init(void)
retval = register_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
COMEDI_NUM_MINORS, "comedi");
if (retval)
- return -EIO;
+ return retval;
+
cdev_init(&comedi_cdev, &comedi_fops);
comedi_cdev.owner = THIS_MODULE;
retval = kobject_set_name(&comedi_cdev.kobj, "comedi");
- if (retval) {
- unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
- COMEDI_NUM_MINORS);
- return retval;
- }
+ if (retval)
+ goto out_unregister_chrdev_region;
+
+ retval = cdev_add(&comedi_cdev, MKDEV(COMEDI_MAJOR, 0),
+ COMEDI_NUM_MINORS);
+ if (retval)
+ goto out_unregister_chrdev_region;
- if (cdev_add(&comedi_cdev, MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS)) {
- unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
- COMEDI_NUM_MINORS);
- return -EIO;
- }
comedi_class = class_create(THIS_MODULE, "comedi");
if (IS_ERR(comedi_class)) {
+ retval = PTR_ERR(comedi_class);
pr_err("failed to create class\n");
- cdev_del(&comedi_cdev);
- unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
- COMEDI_NUM_MINORS);
- return PTR_ERR(comedi_class);
+ goto out_cdev_del;
}
comedi_class->dev_groups = comedi_dev_groups;
@@ -2914,11 +2910,8 @@ static int __init comedi_init(void)
dev = comedi_alloc_board_minor(NULL);
if (IS_ERR(dev)) {
- comedi_cleanup_board_minors();
- cdev_del(&comedi_cdev);
- unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0),
- COMEDI_NUM_MINORS);
- return PTR_ERR(dev);
+ retval = PTR_ERR(dev);
+ goto out_cleanup_board_minors;
}
/* comedi_alloc_board_minor() locked the mutex */
mutex_unlock(&dev->mutex);
@@ -2928,6 +2921,15 @@ static int __init comedi_init(void)
comedi_proc_init();
return 0;
+
+out_cleanup_board_minors:
+ comedi_cleanup_board_minors();
+ class_destroy(comedi_class);
+out_cdev_del:
+ cdev_del(&comedi_cdev);
+out_unregister_chrdev_region:
+ unregister_chrdev_region(MKDEV(COMEDI_MAJOR, 0), COMEDI_NUM_MINORS);
+ return retval;
}
module_init(comedi_init);