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| author | Rolf Eike Beer <eike-kernel@sf-tec.de> | 2006-09-29 02:00:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-29 09:18:16 -0700 |
| commit | 3e26a423e78c1bb1ebd29c49d4ae4ccbbacd861b (patch) | |
| tree | 9ef489f3ec27e1d4325ac2a2ed9f0f0031e63ef7 /drivers/char/raw.c | |
| parent | 416bc51292f977b43b010c6dd937522b90062390 (diff) | |
| download | lwn-3e26a423e78c1bb1ebd29c49d4ae4ccbbacd861b.tar.gz lwn-3e26a423e78c1bb1ebd29c49d4ae4ccbbacd861b.zip | |
[PATCH] Return better error codes if drivers/char/raw.c module init fails
Currently this module just returns 1 if anything on module init fails. Store
the error code of the different function calls and return their error on
problems.
Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
[ Fixed to not unregister twice on error ]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char/raw.c')
| -rw-r--r-- | drivers/char/raw.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/char/raw.c b/drivers/char/raw.c index 579868af4a54..c596a08c07b3 100644 --- a/drivers/char/raw.c +++ b/drivers/char/raw.c @@ -288,31 +288,34 @@ static struct cdev raw_cdev = { static int __init raw_init(void) { dev_t dev = MKDEV(RAW_MAJOR, 0); + int ret; - if (register_chrdev_region(dev, MAX_RAW_MINORS, "raw")) + ret = register_chrdev_region(dev, MAX_RAW_MINORS, "raw"); + if (ret) goto error; cdev_init(&raw_cdev, &raw_fops); - if (cdev_add(&raw_cdev, dev, MAX_RAW_MINORS)) { + ret = cdev_add(&raw_cdev, dev, MAX_RAW_MINORS); + if (ret) { kobject_put(&raw_cdev.kobj); - unregister_chrdev_region(dev, MAX_RAW_MINORS); - goto error; + goto error_region; } raw_class = class_create(THIS_MODULE, "raw"); if (IS_ERR(raw_class)) { printk(KERN_ERR "Error creating raw class.\n"); cdev_del(&raw_cdev); - unregister_chrdev_region(dev, MAX_RAW_MINORS); - goto error; + ret = PTR_ERR(raw_class); + goto error_region; } class_device_create(raw_class, NULL, MKDEV(RAW_MAJOR, 0), NULL, "rawctl"); return 0; +error_region: + unregister_chrdev_region(dev, MAX_RAW_MINORS); error: - printk(KERN_ERR "error register raw device\n"); - return 1; + return ret; } static void __exit raw_exit(void) |