linux-kernel - Re: [PATCH] mfd: wm831x: Remove redundant !pdata checks

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Date:   Mon, 22 May 2017 11:49:15 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
Cc:     patches@...nsource.wolfsonmicro.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mfd: wm831x: Remove redundant !pdata checks

On Mon, 15 May 2017, Charles Keepax wrote:

> Since a copy of the pdata was added into the core struct in
> commit f6dd8449cd50 ("mfd: wm831x: Add basic device tree binding")
> the pdata pointer in probe can no longer be NULL. As such remove
> the redundant checks for this case.
> 
> Signed-off-by: Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>
> ---
>  drivers/mfd/wm831x-core.c | 26 ++++++++++++--------------
>  1 file changed, 12 insertions(+), 14 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
> index 13a4c11..e70d35e 100644
> --- a/drivers/mfd/wm831x-core.c
> +++ b/drivers/mfd/wm831x-core.c
> @@ -1766,7 +1766,7 @@ int wm831x_device_init(struct wm831x *wm831x, int irq)
>  	}
>  	wm831x->locked = 1;
>  
> -	if (pdata && pdata->pre_init) {
> +	if (pdata->pre_init) {
>  		ret = pdata->pre_init(wm831x);
>  		if (ret != 0) {
>  			dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
> @@ -1774,19 +1774,17 @@ int wm831x_device_init(struct wm831x *wm831x, int irq)
>  		}
>  	}
>  
> -	if (pdata) {
> -		for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
> -			if (!pdata->gpio_defaults[i])
> -				continue;
> +	for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
> +		if (!pdata->gpio_defaults[i])
> +			continue;
>  
> -			wm831x_reg_write(wm831x,
> -					 WM831X_GPIO1_CONTROL + i,
> -					 pdata->gpio_defaults[i] & 0xffff);
> -		}
> +		wm831x_reg_write(wm831x,
> +				 WM831X_GPIO1_CONTROL + i,
> +				 pdata->gpio_defaults[i] & 0xffff);
>  	}
>  
>  	/* Multiply by 10 as we have many subdevices of the same type */
> -	if (pdata && pdata->wm831x_num)
> +	if (pdata->wm831x_num)
>  		wm831x_num = pdata->wm831x_num * 10;
>  	else
>  		wm831x_num = -1;
> @@ -1809,7 +1807,7 @@ int wm831x_device_init(struct wm831x *wm831x, int irq)
>  		ret = mfd_add_devices(wm831x->dev, wm831x_num,
>  				      wm8311_devs, ARRAY_SIZE(wm8311_devs),
>  				      NULL, 0, NULL);
> -		if (!pdata || !pdata->disable_touch)
> +		if (!pdata->disable_touch)
>  			mfd_add_devices(wm831x->dev, wm831x_num,
>  					touch_devs, ARRAY_SIZE(touch_devs),
>  					NULL, 0, NULL);
> @@ -1819,7 +1817,7 @@ int wm831x_device_init(struct wm831x *wm831x, int irq)
>  		ret = mfd_add_devices(wm831x->dev, wm831x_num,
>  				      wm8312_devs, ARRAY_SIZE(wm8312_devs),
>  				      NULL, 0, NULL);
> -		if (!pdata || !pdata->disable_touch)
> +		if (!pdata->disable_touch)
>  			mfd_add_devices(wm831x->dev, wm831x_num,
>  					touch_devs, ARRAY_SIZE(touch_devs),
>  					NULL, 0, NULL);
> @@ -1865,7 +1863,7 @@ int wm831x_device_init(struct wm831x *wm831x, int irq)
>  		dev_info(wm831x->dev, "32.768kHz clock disabled, no RTC\n");
>  	}
>  
> -	if (pdata && pdata->backlight) {
> +	if (pdata->backlight) {
>  		/* Treat errors as non-critical */
>  		ret = mfd_add_devices(wm831x->dev, wm831x_num, backlight_devs,
>  				      ARRAY_SIZE(backlight_devs), NULL,
> @@ -1877,7 +1875,7 @@ int wm831x_device_init(struct wm831x *wm831x, int irq)
>  
>  	wm831x_otp_init(wm831x);
>  
> -	if (pdata && pdata->post_init) {
> +	if (pdata->post_init) {
>  		ret = pdata->post_init(wm831x);
>  		if (ret != 0) {
>  			dev_err(wm831x->dev, "post_init() failed: %d\n", ret);

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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