linux-kernel - Re: [PATCH v2] staging: media: atomisp: Fix error path in lm3554

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Date:   Fri, 4 Sep 2020 09:35:07 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Alex Dewar <alex.dewar90@...il.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alan Cox <alan@...ux.intel.com>, linux-media@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] staging: media: atomisp: Fix error path in
 lm3554_probe()

On Thu, Sep 03, 2020 at 07:24:51PM +0100, Alex Dewar wrote:
> +
> +	ret = atomisp_register_i2c_module(&flash->sd, NULL, LED_FLASH);
> +	if (!ret)
> +		return 0;

Ugh!!!  This is a a special case of the "success handling instead of
failure handling" anti-pattern where the last condition in the function
is different.  I just fixed a bug caused by this on Wed.

https://www.spinics.net/lists/netdev/msg680226.html

But it doesn't cause any problems here so whatever...

Reviewed-by: Dan Carpenter <dan.carpenter@...cle.com>

regards,
dan carpenter