[alsa-devel] [PATCH] Fix debugfs_create_dir's error checking method for sound/soc/

[Mark Brown]

On Fri, Oct 17, 2008 at 09:04:55PM +0800, Zhaolei wrote:

> debugfs_create_dir() returns NULL if an error occurs, returns -ENODEV
> when debugfs is not enabled in the kernel.

...

>  	asoc_debugfs = debugfs_create_dir("asoc", NULL);
> -	if (!IS_ERR(asoc_debugfs))
> +	if (!IS_ERR(asoc_debugfs) && asoc_debugfs)
>  		debugfs_create_u32("dapm_pop_time", 0744, asoc_debugfs,
>  				   &pop_time);

Hrmpf.  This looks like something that should be fixed in debugfs -
using both error reporting strategies is rather unhelpful and we're
actually loosing information in the case where debugfs is built.  I'll
send a patch and see what people thing.

Still in the meantime,

Acked-by: Mark Brown <broonie at opensource.wolfsonmicro.com>