linux-kernel - Re: [PATCH] perf tools: return errcode in cs_etm__process_auxtrace

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Date:   Mon, 18 Mar 2019 14:15:18 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Yue Haibing <yuehaibing@...wei.com>
Cc:     mathieu.poirier@...aro.org, suzuki.poulose@....com,
        peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] perf tools: return errcode in
 cs_etm__process_auxtrace_info

Em Fri, Mar 15, 2019 at 10:26:49AM +0800, Yue Haibing escreveu:
> From: YueHaibing <yuehaibing@...wei.com>
> 
> 'err' is set in err path, but it's not returned to callers.
> Also fix a pass zero to PTR_ERR issue.

Next time please submit two patches, one for the PTR_ERR and another for
not throwing away the err = -E!INVAL and returning just -EINVAL, I'm
doing it this time.
 
 - Arnaldo

> Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  tools/perf/util/cs-etm.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 1108049..111f33c 100644
> --- a/tools/perf/util/cs-etm.c
> +++ b/tools/perf/util/cs-etm.c
> @@ -1908,7 +1908,7 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>  
>  		/* Something went wrong, no need to continue */
>  		if (!inode) {
> -			err = PTR_ERR(inode);
> +			err = -ENOMEM;
>  			goto err_free_metadata;
>  		}
>  
> @@ -2023,5 +2023,5 @@ int cs_etm__process_auxtrace_info(union perf_event *event,
>  err_free_hdr:
>  	zfree(&hdr);
>  
> -	return -EINVAL;
> +	return err;
>  }
> -- 
> 2.7.0
> 

-- 

- Arnaldo