linux-kernel - Re: [PATCH v4 6/6] Input: Add ChromeOS EC keyboard driver

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Message-ID: <20130216204954.GA22044@core.coreip.homeip.net>
Date:	Sat, 16 Feb 2013 12:49:54 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Simon Glass <sjg@...omium.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Luigi Semenzato <semenzato@...omium.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>, Felipe Balbi <balbi@...com>,
	Sourav Poddar <sourav.poddar@...com>,
	Tony Lindgren <tony@...mide.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Mike A. Chan" <mikechan@...gle.com>,
	Jun Nakajima <jun.nakajima@...el.com>,
	Tom Keel <thomas.keel@...el.com>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-input@...r.kernel.org
Subject: Re: [PATCH v4 6/6] Input: Add ChromeOS EC keyboard driver

Hi Simon,

On Fri, Feb 15, 2013 at 08:16:12PM -0800, Simon Glass wrote:
> +	for (row = 0; row < ckdev->rows; row++) {
> +		if (cros_ec_keyb_row_has_ghosting(ckdev, buf, row))
> +			return true;
> +	}

No need for curly braces here. I would not care if not for below.

> +
> +	return 0;
> +
> +fail_register:
> +	kfree(idev->keycode);

Sorry I did not notice this before, but idev->keycode is devm-managed,
so you either need to use devm_kfree() or just remove call to kfree()
and let it clean up automatically (which will happen if binding fails or
upon removal).

BTW, maybe you should move the whole driver to devm_*? We have
devm_kzalloc() for ckdev and you can use devm_input_allocate_device().
Then you can get rid of entire erro handling path and completely remove
the remove() method as well.
 
> +fail_matrix:
> +	input_free_device(idev);
> +fail_alloc_dev:
> +	kfree(ckdev);
> +	return err;
> +}
> +

Thanks.

-- 
Dmitry
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