linux-kernel - Re: [PATCH] Applying inappropriate ioctl operation on socket should return ENOTTY

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Message-ID: <BANLkTikLUssAMHBkPmwKFZja6OMDih_DKQ@mail.gmail.com>
Date:	Thu, 28 Apr 2011 16:49:31 +0800
From:	Lifeng Sun <lifongsun@...il.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] Applying inappropriate ioctl operation on socket should
 return ENOTTY

On Wed, Apr 27, 2011 at 8:09 PM, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
>> diff --git a/drivers/char/viotape.c b/drivers/char/viotape.c
>> index ad6e64a..a427d40 100644
>> --- a/drivers/char/viotape.c
>> +++ b/drivers/char/viotape.c
>> @@ -529,7 +529,7 @@ static int viotap_ioctl(struct inode *inode, struct file *file,
>>
>>       down(&reqSem);
>>
>> -     ret = -EINVAL;
>> +     ret = -ENOTTY;
>
> Again this messes up the returns because code assumes the initial
> default.

> The original code also has bugs too (wrong error off
> copy_*_user() again)

It seems alright.

- Lifeng
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