linux-kernel - Re: [PATCH] regulator: pwm: Don't warn on probe deferral

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 24 Feb 2020 16:58:59 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH] regulator: pwm: Don't warn on probe deferral

On Mon, Feb 24, 2020 at 02:40:48PM +0000, Jon Hunter wrote:
> Deferred probe is an expected return value for devm_pwm_get(). Given
> that the driver deals with it properly, there's no need to output a
> warning that may potentially confuse users.

>  		ret = PTR_ERR(drvdata->pwm);
> -		dev_err(&pdev->dev, "Failed to get PWM: %d\n", ret);
> +		if (ret != -EPROBE_DEFER)
> +			dev_err(&pdev->dev, "Failed to get PWM: %d\n", ret);

This then means that there's no way for users to determine why the
driver has failed to instantiate which can be frustrating.  It'd be
better to at least have some dev_dbg() output when deferring so that
there's something for people to go on without having to instrument the
code.

Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)