Re: [patch] fbdev: ssd1307fb: potential ERR_PTR dereference

[Tomi Valkeinen <tomi.valkeinen@ti.com>]

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On 23/05/15 20:32, Dan Carpenter wrote:
> The error handling got shifted down a few lines from where it was
> supposed to be for some reason.
> 
> Fixes: a14a7ba8cb0f ('fbdev: ssd1307fb: add backlight controls for setting the contrast')
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> 
> diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
> index 8fc224c..9c28a77 100644
> --- a/drivers/video/fbdev/ssd1307fb.c
> +++ b/drivers/video/fbdev/ssd1307fb.c
> @@ -655,15 +655,16 @@ static int ssd1307fb_probe(struct i2c_client *client,
>  	snprintf(bl_name, sizeof(bl_name), "ssd1307fb%d", info->node);
>  	bl = backlight_device_register(bl_name, &client->dev, par,
>  				       &ssd1307fb_bl_ops, NULL);
> -	bl->props.brightness = par->contrast;
> -	bl->props.max_brightness = MAX_CONTRAST;
> -	info->bl_dev = bl;
> -
>  	if (IS_ERR(bl)) {
>  		dev_err(&client->dev, "unable to register backlight device: %ld\n",
>  			PTR_ERR(bl));
>  		goto bl_init_error;
>  	}
> +
> +	bl->props.brightness = par->contrast;
> +	bl->props.max_brightness = MAX_CONTRAST;
> +	info->bl_dev = bl;
> +
>  	dev_info(&client->dev, "fb%d: %s framebuffer device registered, using %d bytes of video memory\n", info->node, info->fix.id, vmem_size);
>  
>  	return 0;
> 

Thanks, queued for 4.2.

 Tomi


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