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

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Message-Id: <1190617751.5133.88.camel@aeonflux.holtmann.net>
Date:	Mon, 24 Sep 2007 09:09:11 +0200
From:	Marcel Holtmann <marcel@...tmann.org>
To:	roel <12o3l@...cali.nl>
Cc:	WANG Cong <xiyou.wangcong@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, bluez-devel@...ts.sf.net,
	maxk@...lcomm.com
Subject: Re: [-mm Patch] net/bluetooth/hidp/core.c: Make hidp_setup_input()
	return int

Hi,

> > 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;
> 	}

lets use "if (err < 0)" and I am okay with that patch.

Regards

Marcel


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