linux-kernel - Re: [PATCH v4 2/5] perf config: Refactor the code using 'ret' variable in cmd

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Date:   Mon, 19 Jun 2017 15:34:03 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Taeung Song <treeze.taeung@...il.com>
Cc:     linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH v4 2/5] perf config: Refactor the code using 'ret'
 variable in cmd_config()

Em Sat, Jun 17, 2017 at 12:46:42PM +0900, Taeung Song escreveu:
> To simplify the code related to 'ret' variable in cmd_config(),
> initialize 'ret' with -1 instead of 0.

Thanks, applied.
 
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Namhyung Kim <namhyung@...nel.org>
> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
> ---
>  tools/perf/builtin-config.c | 30 +++++++++++++-----------------
>  1 file changed, 13 insertions(+), 17 deletions(-)
> 
> diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
> index bb1be79..ece4558 100644
> --- a/tools/perf/builtin-config.c
> +++ b/tools/perf/builtin-config.c
> @@ -156,7 +156,7 @@ static int parse_config_arg(char *arg, char **var, char **value)
>  
>  int cmd_config(int argc, const char **argv)
>  {
> -	int i, ret = 0;
> +	int i, ret = -1;
>  	struct perf_config_set *set;
>  	char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));
>  	const char *config_filename;
> @@ -186,10 +186,8 @@ int cmd_config(int argc, const char **argv)
>  	 * because of reinitializing with options config file location.
>  	 */
>  	set = perf_config_set__new();
> -	if (!set) {
> -		ret = -1;
> +	if (!set)
>  		goto out_err;
> -	}
>  
>  	switch (actions) {
>  	case ACTION_LIST:
> @@ -197,10 +195,11 @@ int cmd_config(int argc, const char **argv)
>  			pr_err("Error: takes no arguments\n");
>  			parse_options_usage(config_usage, config_options, "l", 1);
>  		} else {
> -			ret = show_config(set);
> -			if (ret < 0)
> +			if (show_config(set) < 0) {
>  				pr_err("Nothing configured, "
>  				       "please check your %s \n", config_filename);
> +				goto out_err;
> +			}
>  		}
>  		break;
>  	default:
> @@ -215,38 +214,35 @@ int cmd_config(int argc, const char **argv)
>  
>  			if (!arg) {
>  				pr_err("%s: strdup failed\n", __func__);
> -				ret = -1;
> -				break;
> +				goto out_err;
>  			}
>  
>  			if (parse_config_arg(arg, &var, &value) < 0) {
>  				free(arg);
> -				ret = -1;
> -				break;
> +				goto out_err;
>  			}
>  
>  			if (value == NULL) {
> -				ret = show_spec_config(set, var);
> -				if (ret < 0) {
> +				if (show_spec_config(set, var) < 0) {
>  					pr_err("%s is not configured: %s\n",
>  					       var, config_filename);
>  					free(arg);
> -					break;
> +					goto out_err;
>  				}
>  			} else {
> -				ret = set_config(set, config_filename, var, value);
> -				if (ret < 0) {
> +				if (set_config(set, config_filename, var, value) < 0) {
>  					pr_err("Failed to set '%s=%s' on %s\n",
>  					       var, value, config_filename);
>  					free(arg);
> -					break;
> +					goto out_err;
>  				}
>  			}
>  			free(arg);
>  		}
>  	}
>  
> -	perf_config_set__delete(set);
> +	ret = 0;
>  out_err:
> +	perf_config_set__delete(set);
>  	return ret;
>  }
> -- 
> 2.7.4