[alsa-devel] [PATCH v3 1/4] ASoc: kirkwood: simplify probe error

[Jean-Francois Moine]

On Sat, 3 Aug 2013 13:46:52 +0100
Russell King - ARM Linux <linux at arm.linux.org.uk> wrote:

> On Wed, Jul 31, 2013 at 08:17:39AM +0200, Jean-Francois Moine wrote:
> > The function kirkwood_i2s_dev_remove() may be used when probe fails.
> 
> Looking at this deeper, I'm not happy with this.
	[snip]
> What this means is that if snd_soc_register_component() fails, we end
> up calling snd_soc_unregister_component().  This may be fine with the
> way snd_soc_unregister_component() is currently implemented, but you're
> making the assumption that it's fine to call snd_soc_unregister_component()
> for a device which hasn't been registered.  Technically, this is a
> layering violation, which makes this change fragile if the behaviour
> of snd_soc_unregister_component() changes in the future.
> 
> For the sake of two calls in the error path, I don't think the benefits
> of this patch outweigh the risk.

You are right, but if snd_soc_unregister_component() could be
officially used safely with no previous call to
snd_soc_register_component(), this would simplify error handling in
other drivers too...

-- 
Ken ar c'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/