Messages in this thread | | | Date | Thu, 29 Sep 2011 21:28:39 +1000 | From | Ryan Mallon <> | Subject | Re: [PATCH 1/2] ASoC: Add BUG() assertion if max98088_get_channel returns -EINVAL |
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On 29/09/11 20:34, Mark Brown wrote: > 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.
Yeah, it can basically only happen if there is a mismatch between the kcontrol definition and the get_channel function in the driver. Would you be happy with adding a:
dev_err(codec->dev, "Bad kcontrol channel name\n");
and then returning the error? It doesn't seem worth panicking the whole driver/system for a bug like this.
~Ryan
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