linux-kernel - Re: [PATCH v4 4/6] drivers: leds: Add the iEi WT61P803 PUZZLE LED driver

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20201007112756.GD12224@duo.ucw.cz>
Date:   Wed, 7 Oct 2020 13:27:56 +0200
From:   Pavel Machek <pavel@....cz>
To:     Luka Kovacic <luka.kovacic@...tura.hr>
Cc:     linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        linux-leds@...r.kernel.org, lee.jones@...aro.org, dmurphy@...com,
        robh+dt@...nel.org, jdelvare@...e.com, linux@...ck-us.net,
        marek.behun@....cz, luka.perkov@...tura.hr, robert.marko@...tura.hr
Subject: Re: [PATCH v4 4/6] drivers: leds: Add the iEi WT61P803 PUZZLE LED
 driver

Hi!

> Add support for the iEi WT61P803 PUZZLE LED driver.
> Currently only the front panel power LED is supported.
> 
> This driver depends on the iEi WT61P803 PUZZLE MFD driver.

> +static int iei_wt61p803_puzzle_led_brightness_set_blocking(struct led_classdev *cdev,
> +							   enum led_brightness brightness)
> +{
> +	struct iei_wt61p803_puzzle_led *priv = cdev_to_iei_wt61p803_puzzle_led(cdev);
> +	unsigned char *resp_buf = priv->response_buffer;
> +	unsigned char led_power_cmd[5] = {
> +		IEI_WT61P803_PUZZLE_CMD_HEADER_START,
> +		IEI_WT61P803_PUZZLE_CMD_LED,
> +		IEI_WT61P803_PUZZLE_CMD_LED_POWER,
> +		(char)IEI_LED_OFF
> +	};
> +	size_t reply_size;
> +
> +	mutex_lock(&priv->lock);
> +	if (brightness == LED_OFF) {
> +		led_power_cmd[3] = (char)IEI_LED_OFF;
> +		priv->led_power_state = LED_OFF;
> +	} else {
> +		led_power_cmd[3] = (char)IEI_LED_ON;
> +		priv->led_power_state = LED_ON;
> +	}
> +	mutex_unlock(&priv->lock);

Are you sure you need the mutex?

> +	ret = devm_led_classdev_register_ext(dev, &priv->cdev, &init_data);
> +	if (ret) {
> +		dev_err(dev, "Could not register LED\n");
> +		goto err_child_node;
> +	}
> +	return 0;
> +err_child_node:
> +	fwnode_handle_put(child);
> +	return ret;
> +}

Is the fwnode_handle_put(child); missing in non-error path somewhere?

> +MODULE_LICENSE("GPL");

Make sure this is consistent with file header. GPLv2+, if you can.

Best regards,

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

Download attachment "signature.asc" of type "application/pgp-signature" (196 bytes)