# Re: \[PATCH\] Added backlight driver for Acer Aspire 4736

- From: Joe Perches \<joe@perches.com\>
- Date: 2012-03-12 23:07:59 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2012/03/3834503
- Thread: https://ratatoskr.run/linux-fbdev/2012/03/3834316/t.md

```text
On Mon, 2012-03-12 at 23:12 -0400, Pradeep Subrahmanion wrote:
> Hi ,

Hello yourself.

Just some trivial comments:

> diff --git a/drivers/video/backlight/acer4736_bl.c b/drivers/video/backlight/acer4736_bl.c
[]
Please add
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
before any include

> +static int update_brightness(struct backlight_device *bd)
> +{
> +	u8 intensity = bd->props.brightness;
> +	if (intensity > max_brightness) {
> +		printk(KERN_INFO "Acer4736_bl: Invalid parameter. Maximum value is %d"
> +		, max_brightness);

Beginning a line with a comma is not at all common and
should be avoided.  printks need newline terminations,
and this would be better as pr_info.  Maybe:

		pr_info("Invalid parameter %u: Maximum allowed value: %u\n",
			intensity, max_brightness);

> +	printk(KERN_INFO "Loading Acer 4736 backlight driver\n");

	pr_info("Loading backlight driver\n");



```