linux-kernel - Re: [PATCH v2] perf bpf-filter: Return -ENOMEM directly when pfi allocation fails

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Message-ID: <ZzvW7qjkVYWMSNP5@google.com>
Date: Mon, 18 Nov 2024 16:08:14 -0800
From: Namhyung Kim <namhyung@...nel.org>
To: Hao Ge <hao.ge@...ux.dev>
Cc: peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
	mark.rutland@....com, alexander.shishkin@...ux.intel.com,
	jolsa@...nel.org, irogers@...gle.com, adrian.hunter@...el.com,
	kan.liang@...ux.intel.com, linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
	Hao Ge <gehao@...inos.cn>
Subject: Re: [PATCH v2] perf bpf-filter: Return -ENOMEM directly when pfi
 allocation fails

On Wed, Nov 13, 2024 at 11:05:37AM +0800, Hao Ge wrote:
> From: Hao Ge <gehao@...inos.cn>
> 
> Directly return -ENOMEM when pfi allocation fails,
> instead of performing other operations on pfi.
> 
> Fixes: 0fe2b18ddc40 ("perf bpf-filter: Support multiple events properly")
> Signed-off-by: Hao Ge <gehao@...inos.cn>

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung

> ---
> v2: Replace -1 with -ENOMEM as per Arnaldo's reminder.
>     Update title and commit message due to code change
> ---
>  tools/perf/util/bpf-filter.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/util/bpf-filter.c b/tools/perf/util/bpf-filter.c
> index e87b6789eb9e..a4fdf6911ec1 100644
> --- a/tools/perf/util/bpf-filter.c
> +++ b/tools/perf/util/bpf-filter.c
> @@ -375,7 +375,7 @@ static int create_idx_hash(struct evsel *evsel, struct perf_bpf_filter_entry *en
>  	pfi = zalloc(sizeof(*pfi));
>  	if (pfi == NULL) {
>  		pr_err("Cannot save pinned filter index\n");
> -		goto err;
> +		return -ENOMEM;
>  	}
>  
>  	pfi->evsel = evsel;
> -- 
> 2.25.1
>