Messages in this thread | | | From | Jonathan Woithe <> | Subject | Re: [PATCH] fujitsu-laptop: driver [un]registration fixes | Date | Tue, 22 Dec 2009 09:02:40 +1030 (CST) |
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Hi Dmitry
> On Wed, Jul 29, 2009 at 10:15:33PM +0200, Bartlomiej Zolnierkiewicz wrote: > > @@ -722,22 +722,22 @@ static int acpi_fujitsu_add(struct acpi_ > > > > return result; > > > > -end: > > +err_unregister_input_dev: > > + input_unregister_device(input); > > err_free_input_dev: > > input_free_device(input); > > err_stop: > > Just noticed it scanning ACPI list. You must not use input_free_device() > after calling input_unregister_device() since unregister likely drops the > last reference to the device and it will get freed by input core.
So what's the correct way to deal with that in this case? Something like
-end: +err_unregister_input_dev: + input_unregister_device(input); + goto err_stop; err_free_input_dev: input_free_device(input); err_stop:
(with a short comment to explain the goto) would circumvent the problem but it looks ugly (at least to my eyes - I've never really liked "goto"s :-) ).
> For polled input devices you need to use both unregister and free though > because polled device structure is not refcounted (but underlying input > device is).
This isn't a polled input device AFAIK so this doesn't apply here, right?
Regards jonathan
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