linux-kernel - Re: [PATCH] Staging: dt3155: Remove copy_to_user for ioctl's DT3155

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Message-ID: <4C46A85C.2090608@gmail.com>
Date:	Wed, 21 Jul 2010 09:57:16 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	devel@...verdev.osuosl.org, ss@....gov.au, gregkh@...e.de
Subject: Re: [PATCH] Staging: dt3155: Remove copy_to_user for ioctl's DT3155_{STOP|START}

On 07/21/2010 02:57 AM, H Hartley Sweeten wrote:
> The ioctl's DT3155_STOP and DT3155_START are defined with the macro
> _IO indicating that they have no parameters. They should not be using
> copy_to_user to return data to user space.

This is not a reason for removing them. You should check what real users
do/expect and base your reasoning on the top of that.

So could you investigate that?

regards,
-- 
js
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