linux-kernel - Re: [PATCH 4.19 066/206] soundwire: slave: dont init debugfs on device registration error

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Message-ID: <20200623211102.GB4401@amd>
Date:   Tue, 23 Jun 2020 23:11:03 +0200
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Guennadi Liakhovetski <guennadi.liakhovetski@...ux.intel.com>,
        Vinod Koul <vkoul@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 4.19 066/206] soundwire: slave: dont init debugfs on
 device registration error

Hi!

> [ Upstream commit 8893ab5e8ee5d7c12e0fc1dca4a309475064473d ]
> 
> The error handling flow seems incorrect, there is no reason to try and
> add debugfs support if the device registration did not
> succeed. Return on error.

> +++ b/drivers/soundwire/slave.c
> @@ -55,6 +55,8 @@ static int sdw_slave_add(struct sdw_bus *bus,
>  		list_del(&slave->node);
>  		mutex_unlock(&bus->bus_lock);
>  		put_device(&slave->dev);
> +
> +		return ret;
>  	}
>  
>  	return ret;

Mainline is significantly different here; this patch does not make
sense in v4.19 -- as it does not do anything.

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

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