Re: [PATCH] staging: bcm2835-audio: Disconnect and free vchi_instance on module_exit()

Greg Kroah-Hartman
2018-04-24T07:16:18Z

On Tue, Apr 24, 2018 at 02:35:50AM +0200, Kirill Marinushkin wrote:
> On 04/23/18 15:50, Greg Kroah-Hartman wrote:
> > On Tue, Apr 17, 2018 at 07:00:28AM +0200, Kirill Marinushkin wrote:
> >> In the current implementation, vchi_instance is inited during the first
> >> call of bcm2835_audio_open_connection(), and is never freed. It causes a
> >> memory leak when the module `snd_bcm2835` is removed.
> >>
> >> Here is how this commit fixes it:
> >>
> >> * the VCHI context (including vchi_instance) is created once in the
> >> platform's devres
> >> * the VCHI context is allocated and connected once during module_init()
> >> * all created bcm2835_chips have a pointer to this VCHI context
> >> * bcm2835_audio_open_connection() can access the VCHI context through the
> >> associated bcm2835_chip
> >> * the VCHI context is disconnected and freed once during module_exit()
> >>
> >> After this commit is applied, I don't see other issues with the module's
> >> init/exit, so I also remove the associated TODO task.
> >>
> >> Steps to reproduce the memory leak before this commit:
> > <snip>
> >
> > Patch dropped due to kbuild complaints.
> >
> > Please fix up and resend.
> >
> > thanks,
> >
> > greg k-h
>
> Hello Greg,
>
> Due to which complains of kbuild is the patch dropped?
> I would like to fix the complains, but I don't see any errors or warnings on my
> side.
> Are you sure that the kbuild test robot did it's job correctly? The log says:
>
> >> it may well be a FALSE warning
>
> Please show me what is wrong in my patch.

I have no idea as the patch is long gone from my queue now. If you
think all is fine, please resend it and I will be glad to review it
again.

thanks,

greg k-h