linux-kernel - Re: [PATCH 2/2] selftest: rtc: Check if could access /dev/rtc0 before testing

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Date: Thu, 20 Jun 2024 21:37:46 +0200
From: Alexandre Belloni <alexandre.belloni@...tlin.com>
To: Joseph Jang <jjang@...dia.com>
Cc: shuah@...nel.org, avagin@...gle.com, amir73il@...il.com,
	brauner@...nel.org, mochs@...dia.com, kobak@...dia.com,
	linux-kernel@...r.kernel.org, linux-rtc@...r.kernel.org,
	linux-kselftest@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH 2/2] selftest: rtc: Check if could access /dev/rtc0
 before testing

On 23/05/2024 18:38:07-0700, Joseph Jang wrote:
> The rtctest requires the read permission on /dev/rtc0. The rtctest will
> be skipped if the /dev/rtc0 is not readable.
> 
> Reviewed-by: Koba Ko <kobak@...dia.com>
> Reviewed-by: Matthew R. Ochs <mochs@...dia.com>
> Signed-off-by: Joseph Jang <jjang@...dia.com>

Acked-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

> ---
>  tools/testing/selftests/rtc/rtctest.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c
> index 2b12497eb30d..d104f5326cf4 100644
> --- a/tools/testing/selftests/rtc/rtctest.c
> +++ b/tools/testing/selftests/rtc/rtctest.c
> @@ -483,6 +483,8 @@ __constructor_order_last(void)
>  
>  int main(int argc, char **argv)
>  {
> +	int ret = -1;
> +
>  	switch (argc) {
>  	case 2:
>  		rtc_file = argv[1];
> @@ -494,5 +496,12 @@ int main(int argc, char **argv)
>  		return 1;
>  	}
>  
> -	return test_harness_run(argc, argv);
> +	/* Run the test if rtc_file is accessible */
> +	if (access(rtc_file, R_OK) == 0)
> +		ret = test_harness_run(argc, argv);
> +	else
> +		ksft_exit_skip("[SKIP]: Cannot access rtc file %s - Exiting\n",
> +						rtc_file);
> +
> +	return ret;
>  }
> -- 
> 2.34.1
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com