Return-Path: Date: Fri, 8 Jun 2012 19:01:31 +0300 From: Ido Yariv To: linux-bluetooth@vger.kernel.org Subject: Re: [PATCH] attrib-server: Fix multiple channels detaching mix-up Message-ID: <20120608160131.GA11275@NoteStation> References: <1338322808-15503-1-git-send-email-ido@wizery.com> <20120530073701.GB6539@x220> <20120530183227.GA16709@WorkStation.localnet> <20120606091758.GA12782@WorkStation.localnet> <20120607154417.GC25119@x220.docomointertouch.net> <20120608153944.GA28852@x220.docomointertouch.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20120608153944.GA28852@x220.docomointertouch.net> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: Hi Johan, On Fri, Jun 08, 2012 at 11:39:44PM +0800, Johan Hedberg wrote: > Hi Ido, > > On Thu, Jun 07, 2012, Johan Hedberg wrote: > > Hi Ido, > > > > On Wed, Jun 06, 2012, Ido Yariv wrote: > > > On Wed, May 30, 2012 at 09:32:27PM +0300, Ido Yariv wrote: > > > > From 78254bb099f80ad38e10075fbb73a4d990217630 Mon Sep 17 00:00:00 2001 > > > > From: Ido Yariv > > > > Date: Tue, 29 May 2012 21:11:16 +0300 > > > > Subject: [PATCH v2] attrib-server: Fix multiple channels detaching mix-up > > > > > > > > The identifier returned by g_attrib_register is not unique across > > > > different channels. Since attrib_channel_detach assumes this identifier > > > > to be unique, it may end up detaching the wrong channel when a device > > > > disconnects. > > > > > > > > Fix this by using the channel's pointer as a unique identifier for > > > > detaching the channel. The identifier returned from g_attrib_register > > > > will still be used to find the relevant event structure. > > > > > > Any thoughts about this one? > > > > I don't really like the idea of returning a pointer (even though an > > opaque one) to code that shouldn't have access to data behind that > > pointer. Could we instead just make this really simple by removing > > attrib->next_evt_id and adding a static guint variable into the > > g_attrib_register function? > > Since I haven't heard back from you and we're way overdue with the 4.100 > release I went ahead and pushed this simplified solution. Sorry for the delayed response - I was on a trans-atlantic flight. This was actually the first revision of this patch. I submitted this version, to avoid static variables. In terms of functionality, I'm OK with both solutions. Thanks, Ido.