linux-kernel - Re: Extended error reporting to user space?

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Message-ID: <20100216131722.GA4382@hack.private>
Date:	Tue, 16 Feb 2010 21:17:22 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	"Nikita V. Youshchenko" <yoush@...msu.su>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Extended error reporting to user space?

On Tue, Feb 16, 2010 at 02:23:55PM +0200, Alexey Dobriyan wrote:
>On Tue, Feb 16, 2010 at 2:20 PM, Nikita V. Youshchenko <yoush@...msu.su> wrote:
>> Unfortunately this -EINVAL is not really useful.
>
>There is no such thing.
>Driver can spit messages with printk() though.

Right, if errno is not enough, printk() is.

You could also use other interface to debug, but printk() is the
simplest.

Thanks.
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