Messages in this thread | | | Subject | Re: [PATCH] kobject: make sure kobj->ktype is set before kobject_init | From | Kay Sievers <> | Date | Thu, 29 Nov 2007 20:51:23 +0100 |
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On Thu, 2007-11-29 at 14:05 -0500, Alan Stern wrote: > On Thu, 29 Nov 2007, Kay Sievers wrote: > > > Your error scenario confirmed my initial concern about suggesting > > kobject_put() to clean up an initialized kobject. > > > > We should probably make kobject_cleanup() free only the resources taken > > by kobject_init(), and use kobject_cleanup() instead of kobject_put()? > > My conclusion is different. We should make kobject_init() not consume > any resources at all; just initialize various fields. That way it > would be okay to call either kfree() or kobject_put() on an initialized > kobject. And then when something like device_register() fails, the > caller would know the proper thing to do would be to call the put() > routine, always. > > Of course, once the name has been assigned, only kobject_put() should > be used.
Now we just move the exactly the same problem from _init() to _set_name(). To free the name of an unregistered we would need to call _put() which free()'s the whole object again. :)
> There's another good reason for not assigning the name in > kobject_init(): Code that uses kobjects (like the driver core) doesn't > set the name until later.
That can be done at any stage, I guess. We will rip out the name in the struct device anyway.
Kay
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