Return-Path: From: Ed Tomlinson To: Dmitry Torokhov Subject: Re: [PATCH 0/2] Provide a driver for the Apple Magic Mouse - opps Date: Mon, 15 Feb 2010 07:42:45 -0500 Cc: Jiri Kosina , Michael Poole , linux-input@vger.kernel.org, Marcel Holtmann , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org References: <201002140922.42014.edt@aei.ca> <20100215071145.GA9135@core.coreip.homeip.net> In-Reply-To: <20100215071145.GA9135@core.coreip.homeip.net> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Message-Id: <201002150742.46242.edt@aei.ca> List-ID: On Monday 15 February 2010 02:11:46 Dmitry Torokhov wrote: > On Sun, Feb 14, 2010 at 09:22:41AM -0500, Ed Tomlinson wrote: > > On Sunday 14 February 2010 03:03:44 Dmitry Torokhov wrote: > > > On Sat, Feb 13, 2010 at 02:29:29PM -0500, Ed Tomlinson wrote: > > > > On Wednesday 10 February 2010 08:57:37 Jiri Kosina wrote: > > > > > On Tue, 9 Feb 2010, Michael Poole wrote: > > > > > > > > > > > I think this patch is ready for real review. The Magic Mouse requires > > > > > > that a driver send an unlock Report(Feature) command, similar to the > > > > > > Wacom wireless tablet and Sixaxis controller quirks. This turns on an > > > > > > Input Report that isn't published in the input Report descriptor that > > > > > > contains touch data (and usually overrides the normal motion and click > > > > > > Report). > > > > > > > > > > > > Because the mouse has only one switch and no scroll wheel, the driver > > > > > > (under control of parameters) emulates a middle button and scroll wheel. > > > > > > User space could also ignore and/or re-synthesize those events based on > > > > > > the reported events. > > > > > > > > > > > > The first patch exports hid_register_report() so the driver can turn on > > > > > > the multitouch report. The second patch adds the device ID and the > > > > > > driver. Some user-space tools to talk to the mouse directly (that is, > > > > > > when it is not associated with the host's HIDP stack) are at > > > > > > http://github.com/entrope/linux-magicmouse . > > > > > > > > > > I have applied the driver into apple_magic_mouse branch and merged this > > > > > branch into for-next, so it should appear in the upcoming linux-next. > > > > > > > > > > > This driver (or the hid changes) can triggers an opps. What I did was > > > > start X. Turn on the magic mouse. It connected on input7&8. Then I > > > > powered it off and on. This time it conneced on input9&10. Then I > > > > exited X and got the opps. Note my X does not hotplug the magic > > > > mouse. I've also included a trace of the udev events that generated > > > > the log below (if there was a remove after X stopped it would not be > > > > included). To my eyes it looks like we leak an input device (there is > > > > not a remove event for input8). > > > > > > > > > > Indeed, we seem to be missing call to input_unregister_device() in > > > magicmouse_remove(). > > > > How does this look? With this udevadm shows input8 being removed and > > there is no more opps. > > Almost... you need to do hid_hw_stop() first and only then unregister > input device, Otherwise if you unload the module while moving the mouse > it is likely to still oops.