linux-kernel - Re: [PATCH] Fix V8 device information issue

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Date:   Fri, 10 Mar 2017 19:46:40 +0100
From:   Pali Rohár <pali.rohar@...il.com>
To:     Masaki Ota <012nexus@...il.com>
Cc:     dmitry.torokhov@...il.com, linux-kernel@...lsd.com,
        nick.m.fletcher@...il.com, joseph.salisbury@...onical.com,
        ben@...rt-cactus.org, mhocko@...e.com, rydberg@...math.org,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        masaki.ota@...alps.com
Subject: Re: [PATCH] Fix V8 device information issue

Hi! I have just two notes:

On Friday 10 March 2017 07:41:47 Masaki Ota wrote:
...
> +		x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
> +		y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
...
> +		priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
> +		priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
> +
> +	} else {
...
> +		x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
> +		y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
> +
> +		priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
> +		priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */

Looks like above 4 lines are same in both if { } and else { } blocks.
So it can be moved outside of if blocks.

> +	}
>  	return 0;
>  }
>  
> @@ -2490,7 +2515,10 @@ static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
>  {
>  	unsigned char is_btnless;
>  
> -	is_btnless = (otp[1][1] >> 3) & 0x01;
> +	if (priv->dev_id[2] == 0x28)

This check "dev_id[2] == 0x28" is used on more places. What about
introducing some flag or some boolean macro? Check "dev_id[2] == 0x28"
is magical does not say anything what it is doing...

-- 
Pali Rohár
pali.rohar@...il.com

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