Re: [PATCH] staging: greybus: audio_helper: remove unused and wrong debugfs usage
From: Johan Hovold
Date: Tue Sep 13 2022 - 09:06:59 EST
On Fri, Sep 02, 2022 at 04:37:15PM +0200, Greg Kroah-Hartman wrote:
> In the greybus audio_helper code, the debugfs file for the dapm has the
> potential to be removed and memory will be leaked. There is also the
> very real potential for this code to remove ALL debugfs entries from the
> system, and it seems like this is what will really happen if this code
> ever runs. This all is very wrong as the greybus audio driver did not
> create this debugfs file, the sound core did and controls the lifespan
> of it.
Yeah, this looks very broken indeed.
> So remove all of the debugfs logic from the audio_helper code as there's
> no way it could be correct. If this really is needed, it can come back
> with a fixup for the incorrect usage of the debugfs_lookup() call which
> is what caused this to be noticed at all.
> Cc: Johan Hovold <johan@xxxxxxxxxx>
> Cc: Alex Elder <elder@xxxxxxxxxx>
> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: greybus-dev@xxxxxxxxxxxxxxxx
> Cc: linux-staging@xxxxxxxxxxxxxxx
> Cc: stable <stable@xxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
I know this has already been applied, but still:
Acked-by: Johan Hovold <johan@xxxxxxxxxx>