linux-kernel - Re: [PATCH] staging: goldfish_audio.c: sparse warning of incorrect type

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Message-ID: <20140901093514.GE5122@mwanda>
Date:	Mon, 1 Sep 2014 12:35:14 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: goldfish_audio.c: sparse warning of incorrect
 type

On Sun, Aug 31, 2014 at 09:46:22PM +0530, Sudip Mukherjee wrote:
> @@ -133,9 +134,15 @@ static ssize_t goldfish_audio_read(struct file *fp, char __user *buf,
>  						AUDIO_READ_BUFFER_AVAILABLE);
>  
>  		/* copy data to user space */
> -		if (copy_to_user(buf, data->read_buffer, length))
> +		buffer = kzalloc(length, GFP_KERNEL);
> +		if (buffer == NULL)
> +			return -ENOMEM;
> +		memcpy_fromio(buffer, data->read_buffer, length);
> +		if (copy_to_user((void __user *)buf, buffer, length)) {
                                 ^^^^^^^^^^^^^^^
This cast shouldn't be needed.

regards,
dan carpenter

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