[alsa-devel] [PATCH 1/2] ASoC: Add BUG() assertion if max98088_get_channel returns -EINVAL

Mark Brown broonie at opensource.wolfsonmicro.com
Thu Sep 29 12:34:13 CEST 2011

On Thu, Sep 29, 2011 at 09:15:03AM +1000, Ryan Mallon wrote:
> On 29/09/11 00:01, Axel Lin wrote:
> > The callers use the return value of max98088_get_channel as array index to
> > access max98088->dai[] array.
> > Add BUG() assertion for out of bound access of max98088->dai[] array.

> BUG() is pretty heavy handed for a driver. Why not fix the problem
> properly in the callers?

There's nothing constructive that any of the callers can do with an
error code - it's a clear bug in something (probably the driver) if we
get called for a bad control.  Simply returning an error code isn't
terribly helpful, it's very obscure what's gone wrong and why.  We at
least need a log message.

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