Re: [Consult] Why need we call device_remove_file() firstly beforecall device_unregister() ?

From: Ming Lei
Date: Sat May 18 2013 - 07:06:31 EST


On Fri, May 17, 2013 at 1:43 PM, Chen Gang <gang.chen@xxxxxxxxxxx> wrote:
> Hello All:
> I searched 'arch/*' and 'drivers/*' sub-directory, all of them are 'obey
> this rule', even in device_unregister() itself, it also firstly calls
> device_remove_file(), then call kobject_del().
> But after read the related code (fs/sysfs/*, drivers/base/core.c), it
> seems kobject_del() -> sysfs_remove_dir() which will release all related
> things (can instead of device_remove_file()).
> So in fact, we need not call device_remove_file() before call
> device_unregister(), is it correct ?

Looks it is correct but it is a bit implicit.

Ming Lei
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