linux-kernel - Re: [PATCH -next] perf bench: fix return value check in do_run_multi

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Date:   Thu, 3 Sep 2020 15:53:01 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     peterz@...radead.org, mingo@...hat.com, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, irogers@...gle.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] perf bench: fix return value check in
 do_run_multi_threaded()

Em Wed, Sep 02, 2020 at 10:05:26PM +0800, YueHaibing escreveu:
> In case of error, the function perf_session__new() returns ERR_PTR()
> and never returns NULL. The NULL test in the return value check
> should be replaced with IS_ERR()
> 
> Fixes: 13edc237200c ("perf bench: Add a multi-threaded synthesize benchmark")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>

Thanks, applied, kudos for adding the Fixes: tag, appreciated!

- Arnaldo


> ---
>  tools/perf/bench/synthesize.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/bench/synthesize.c b/tools/perf/bench/synthesize.c
> index 8d624aea1c5e..e39daa609db2 100644
> --- a/tools/perf/bench/synthesize.c
> +++ b/tools/perf/bench/synthesize.c
> @@ -162,8 +162,8 @@ static int do_run_multi_threaded(struct target *target,
>  	init_stats(&event_stats);
>  	for (i = 0; i < multi_iterations; i++) {
>  		session = perf_session__new(NULL, false, NULL);
> -		if (!session)
> -			return -ENOMEM;
> +		if (IS_ERR(session)) {
> +			return PTR_ERR(session);
>  
>  		atomic_set(&event_count, 0);
>  		gettimeofday(&start, NULL);
> -- 
> 2.17.1
> 
> 

-- 

- Arnaldo