linux-kernel - Re: [PATCH v2 1/2] perf cs-etm: Remove errnoeous ERR_PTR() usage in cs_etm__process_auxtrace

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Date:   Thu, 21 Mar 2019 10:42:54 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Yue Haibing <yuehaibing@...wei.com>,
        Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     "Suzuki K. Poulose" <suzuki.poulose@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 1/2] perf cs-etm: Remove errnoeous ERR_PTR() usage in cs_etm__process_auxtrace_info

On Wed, 20 Mar 2019 at 20:31, Yue Haibing <yuehaibing@...wei.com> wrote:
>
> From: YueHaibing <yuehaibing@...wei.com>
>
> intlist__findnew() doesn't uses ERR_PTR() as a return mechanism
> so its callers shouldn't try to extract the error using PTR_ERR(
> ret) from intlist__findnew(), make cs_etm__process_auxtrace_info
> return -ENOMEM instead.
>
> Fixes: cd8bfd8c973e ("perf tools: Add processing of coresight metadata")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
>  tools/perf/util/cs-etm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 1108049..fd7f1da 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;
>                 }
>
> --
> 2.7.0

Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>

Arnaldo, please consider adding to your tally.

>
>