From mboxrd@z Thu Jan  1 00:00:00 1970
From: bjorn@mork.no (=?utf-8?Q?Bj=C3=B8rn_Mork?=)
Date: Tue, 27 May 2014 15:05:57 +0200
Subject: Simple Misc Driver - Problem with string copy to user
In-Reply-To: <CAJyon0vY-zKRNLqJsS94NNnkTzVq2iGirv_wgyrmfB7QtJROyw@mail.gmail.com>
	(Lucas Tanure's message of "Tue, 27 May 2014 10:03:47 -0300")
References: <CAJyon0uo=TH_rS-zx_nr2G-nJDLAiWGuc=MDc1aVo7y96grwng@mail.gmail.com>
	<87ppizgywj.fsf@nemi.mork.no>
	<CAJyon0vY-zKRNLqJsS94NNnkTzVq2iGirv_wgyrmfB7QtJROyw@mail.gmail.com>
Message-ID: <87lhtngymi.fsf@nemi.mork.no>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Lucas Tanure <tanure@linux.com> writes:

> So, My misc_drv_read returns 0, and it's ok. So why the command head didn't
> get the string ?

You told it that it got a string with length 0.  And that's what it printed.


Bj?rn