From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xiao Yang <yangx.jy@cn.fujitsu.com>
Date: Fri, 18 Mar 2016 17:18:34 +0800
Subject: [LTP] [PATCH] input: add kernel version check
In-Reply-To: <20160222111826.GA5704@rei.lan>
References: <1455874725-31499-1-git-send-email-yangx.jy@cn.fujitsu.com>
 <20160222111826.GA5704@rei.lan>
Message-ID: <56EBC7EA.1000703@cn.fujitsu.com>
List-Id: <ltp.lists.linux.it>
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
To: ltp@lists.linux.it

于 2016/02/22 19:18, Cyril Hrubis 写道:
> Hi!
>> In this test case, the functionality of input has been improved by
>> following patch:
>> 'commit 4369c64c79a2 ("Input: Send events one packet at a time")'.
>> So it's not appropriate for testing on kernels that are lower than
>> 3.7.0 anymore.
> Are you sure that you have pointed out right commit? The commit
> description does not seem relevant.
>
> Also can you please describe why the testcases fail before 3.7.0 and
> how? Does kernel send empty sync events?
>
Hi!
When we run input04 on RHEL 5.11GA and 6.7GA, it still fails. It gives 
error message like this:

input04 0 TINFO : Found uinput dev at /dev/uinput
input04 0 TINFO : Unexpected ev type=0 code=0 value=0
input04 1 TFAIL : input04.c:65: Data received /dev/inputX

This failure is because kernel sends empty events. i.e
If we only send EV_SYN to input device, nothing should be received in 
/dev/input/eventX.
Actually, data is received in /dev/input/eventX. This investigation 
shows that it may be
improved by following patch:
'commit 4369c64c79a2 ("Input: Send events one packet at a time")'.

Do you think so ?

Regards,
Xiao Yang