Messages in this thread | | | Date | Fri, 18 Aug 2006 16:27:43 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH][CHAR] Return better error codes if drivers/char/raw.c module init fails |
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On Fri, 18 Aug 2006 09:18:30 +0200 Rolf Eike Beer <eike-kernel@sf-tec.de> wrote:
> 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. > > I'm not sure if this doesn't need even more cleanup, for example kobj_put() > is called only in one error case. >
You seem to be using kmail in funky-confuse-sylpheed mode. Inlined patches in plain-text emails are preferred, please.
> > diff --git a/drivers/char/raw.c b/drivers/char/raw.c > index 579868a..5938e6b 100644 > --- a/drivers/char/raw.c > +++ b/drivers/char/raw.c > @@ -288,31 +288,35 @@ 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) { > + printk(KERN_ERR "error register raw device\n"); > 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; > }
No, it's not obvious what that stray kobject_put() is doing in there.
<hunt, hunt>
http://kernel.org/git/?p=linux/kernel/git/torvalds/old-2.6-bkcvs.git;a=commitdiff;h=b8ff72d28c349bdb7ff5246e83aba384f45d8078
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