linux-kernel - Re: [PATCH] fs/partitions/check.c: add

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Date:	Mon, 30 Jul 2007 18:49:04 +0800
From:	Eugene Teo <eugeneteo@...nel.sg>
To:	Cornelia Huck <cornelia.huck@...ibm.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fs/partitions/check.c: add_partition() warning fixes
 (take 2)

Cornelia Huck wrote:
> On Mon, 30 Jul 2007 17:47:55 +0800,
> Eugene Teo <eugeneteo@...nel.sg> wrote:
> 
>> +err_out_del_link:
>> +	sysfs_remove_link(&p->kobj, "subsystem");
>> +err_out_del_kobj:
>> +	if (!disk->part_uevent_suppress)
>> +		kobject_uevent(&p->kobj, KOBJ_REMOVE);
>> +	kobject_put(&p->kobj);
>> +err_out:
>> +	kfree(p);
>>  }
> 
> No, this is wrong. You need to move the put behind err_out and remove
> the kfree. (The release function will take care of p.)

503 void kobject_put(struct kobject * kobj)
504 {
505         if (kobj)
506                 kref_put(&kobj->kref, kobject_release);
[...]
 52 int kref_put(struct kref *kref, void (*release)(struct kref *kref))
 53 {
[...]
 57         if (atomic_dec_and_test(&kref->refcount)) {
 58                 release(kref);
 59                 return 1;

Nod, thanks for your guidance.

Eugene
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