linux-kernel - Re: [PATCH] Input: cros_ec_keyb

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Date:	Mon, 25 Jul 2016 13:31:51 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Brian Norris <briannorris@...omium.org>
Cc:	Brian Norris <computersforpeace@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH] Input: cros_ec_keyb - cleanup use of dev

On Mon, Jul 25, 2016 at 11:43:48AM -0700, Brian Norris wrote:
> From: Douglas Anderson <dianders@...omium.org>
> 
> In cros_ec_keyb we stored "dev" in "struct cros_ec_keyb", but this was
> the EC's dev pointer and not the keyboard's.  Let's clean this up to
> make it the keyboard's dev pointer.  This could be useful in future
> patches but also has the nice effect of changing a few printouts to
> include the name of the keyboard device instead of the EC device, which
> seems more technically correct.

What is the difference in the output? Could you show old vs new example?

> 
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> Signed-off-by: Brian Norris <briannorris@...omium.org>
> ---
>  drivers/input/keyboard/cros_ec_keyb.c | 19 +++++++++----------
>  1 file changed, 9 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
> index 6e48616a3a88..ab1b50152b86 100644
> --- a/drivers/input/keyboard/cros_ec_keyb.c
> +++ b/drivers/input/keyboard/cros_ec_keyb.c
> @@ -186,7 +186,7 @@ static irqreturn_t cros_ec_keyb_irq(int irq, void *data)
>  	if (ret >= 0)
>  		cros_ec_keyb_process(ckdev, kb_state, ret);
>  	else
> -		dev_err(ec->dev, "failed to get keyboard state: %d\n", ret);
> +		dev_err(ckdev->dev, "failed to get keyboard state: %d\n", ret);
>  
>  	return IRQ_HANDLED;
>  }
> @@ -236,7 +236,7 @@ static void cros_ec_keyb_compute_valid_keys(struct cros_ec_keyb *ckdev)
>  static int cros_ec_keyb_probe(struct platform_device *pdev)
>  {
>  	struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
> -	struct device *dev = ec->dev;
> +	struct device *dev = &pdev->dev;
>  	struct cros_ec_keyb *ckdev;
>  	struct input_dev *idev;
>  	struct device_node *np;
> @@ -246,23 +246,22 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
>  	if (!np)
>  		return -ENODEV;
>  
> -	ckdev = devm_kzalloc(&pdev->dev, sizeof(*ckdev), GFP_KERNEL);
> +	ckdev = devm_kzalloc(dev, sizeof(*ckdev), GFP_KERNEL);
>  	if (!ckdev)
>  		return -ENOMEM;
> -	err = matrix_keypad_parse_of_params(&pdev->dev, &ckdev->rows,
> -					    &ckdev->cols);
> +	err = matrix_keypad_parse_of_params(dev, &ckdev->rows, &ckdev->cols);
>  	if (err)
>  		return err;
>  
> -	ckdev->valid_keys = devm_kzalloc(&pdev->dev, ckdev->cols, GFP_KERNEL);
> +	ckdev->valid_keys = devm_kzalloc(dev, ckdev->cols, GFP_KERNEL);
>  	if (!ckdev->valid_keys)
>  		return -ENOMEM;
>  
> -	ckdev->old_kb_state = devm_kzalloc(&pdev->dev, ckdev->cols, GFP_KERNEL);
> +	ckdev->old_kb_state = devm_kzalloc(dev, ckdev->cols, GFP_KERNEL);
>  	if (!ckdev->old_kb_state)
>  		return -ENOMEM;
>  
> -	idev = devm_input_allocate_device(&pdev->dev);
> +	idev = devm_input_allocate_device(dev);
>  	if (!idev)
>  		return -ENOMEM;
>  
> @@ -273,7 +272,7 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
>  
>  	ckdev->ec = ec;
>  	ckdev->dev = dev;
> -	dev_set_drvdata(&pdev->dev, ckdev);
> +	dev_set_drvdata(dev, ckdev);
>  
>  	idev->name = CROS_EC_DEV_NAME;
>  	idev->phys = ec->phys_name;
> @@ -282,7 +281,7 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
>  	idev->id.bustype = BUS_VIRTUAL;
>  	idev->id.version = 1;
>  	idev->id.product = 0;
> -	idev->dev.parent = &pdev->dev;
> +	idev->dev.parent = dev;
>  	idev->open = cros_ec_keyb_open;
>  	idev->close = cros_ec_keyb_close;
>  
> -- 
> 2.8.0.rc3.226.g39d4020
> 

-- 
Dmitry