Re: [PATCH] mISDN: use kstrdup() in dsp_pipeline_build

[Joe Perches <joe@perches.com>]

On Sat, 2015-10-10 at 02:32 -0700, Geliang Tang wrote:
> Use kstrdup instead of strlen-kmalloc-strcpy.

Not the same code.

Instead of returning early, a 0 length string will
now set pipeline->inuse to 0.

Maybe that's OK, but you should state why in the
commit log.

> diff --git a/drivers/isdn/mISDN/dsp_pipeline.c b/drivers/isdn/mISDN/dsp_pipeline.c
[]
> @@ -250,14 +250,9 @@ int dsp_pipeline_build(struct dsp_pipeline *pipeline, const char *cfg)
>  	if (!cfg)
>  		return 0;
>  
> -	len = strlen(cfg);
> -	if (!len)
> -		return 0;
> -
> -	dup = kmalloc(len + 1, GFP_ATOMIC);
> +	dup = kstrdup(cfg, GFP_ATOMIC);
>  	if (!dup)
>  		return 0;
> -	strcpy(dup, cfg);
>  	while ((tok = strsep(&dup, "|"))) {
>  		if (!strlen(tok))
>  			continue;