linux-kernel - Re: [-mm Patch] net/bluetooth/hidp/core.c: Make hidp_setup

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Message-ID: <20070924023833.GA2442@hacking>
Date:	Mon, 24 Sep 2007 10:38:33 +0800
From:	WANG Cong <xiyou.wangcong@...il.com>
To:	roel <12o3l@...cali.nl>
Cc:	WANG Cong <xiyou.wangcong@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, marcel@...tmann.org,
	bluez-devel@...ts.sf.net, maxk@...lcomm.com
Subject: Re: [-mm Patch] net/bluetooth/hidp/core.c: Make hidp_setup_input()
	return int

On Mon, Sep 24, 2007 at 12:13:22AM +0200, roel wrote:
>WANG Cong wrote:
>> This patch does the following things:
>> 
>> - Make hidp_setup_input() return int to indicate errors.
>> - Check its return value to handle errors.
>> 
>> Signed-off-by: WANG Cong <xiyou.wangcong@...il.com>
>> 
>> ---
>>  net/bluetooth/hidp/core.c |    7 ++++---
>>  1 file changed, 4 insertions(+), 3 deletions(-)
>> 
>> Index: linux-2.6.23-rc6-mm1/net/bluetooth/hidp/core.c
>> ===================================================================
>> --- linux-2.6.23-rc6-mm1.orig/net/bluetooth/hidp/core.c
>> +++ linux-2.6.23-rc6-mm1/net/bluetooth/hidp/core.c
>> @@ -625,7 +625,7 @@ static struct device *hidp_get_device(st
>>  	return conn ? &conn->dev : NULL;
>>  }
>>  
>> -static inline void hidp_setup_input(struct hidp_session *session, struct hidp_connadd_req *req)
>> +static inline int hidp_setup_input(struct hidp_session *session, struct hidp_connadd_req *req)
>>  {
>>  	struct input_dev *input = session->input;
>>  	int i;
>> @@ -669,7 +669,7 @@ static inline void hidp_setup_input(stru
>>  
>>  	input->event = hidp_input_event;
>>  
>> -	input_register_device(input);
>> +	return input_register_device(input);
>>  }
>>  
>>  static int hidp_open(struct hid_device *hid)
>> @@ -823,7 +823,8 @@ int hidp_add_connection(struct hidp_conn
>>  	session->idle_to = req->idle_to;
>>  
>>  	if (session->input)
>> -		hidp_setup_input(session, req);
>> +		if ((err = (hidp_setup_input(session, req))))
>> +			goto failed;
>
>This is confusing, why not just do
>
>	if (session->input) {
>		err = hidp_setup_input(session, req);
>		if (err)
>			goto failed;
>	}

Yes, you are right. Thanks. I will resend this patch. ;)

-- 
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."

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