From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH v1 5/5] driver-core: add driver asynchronous probe support
Date: Mon, 29 Sep 2014 17:26:01 -0400
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Cc: gregkh@linuxfoundation.org,
	"Luis R. Rodriguez" <mcgrof@do-not-panic.com>,
	dmitry.torokhov@gmail.com, tiwai@suse.de, arjan@linux.intel.com,
	teg@jklm.no, rmilasan@suse.com, werner@suse.com, oleg@redhat.com,
	hare@suse.com, bpoirier@suse.de, santosh@chelsio.com,
	pmladek@suse.cz, dbueso@suse.com, linux-kernel@vger.kernel.org,
	Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
	Joseph Salisbury <joseph.salisbury@canonical.com>,
	Kay Sievers <kay@vrfy.org>,
	One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
	Tim Gardner <tim.gardner@canonical.com>,
	Pierre Fersing <pierre-fersing@pierref.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Nagalakshmi Nandigama <nagalakshmi.nandigama@avagotech.com>,
	Praveen Krishnamoorthy <praveen.krishnamoorthy@avagotech.com>,
	Sreekanth Reddy <sreekanth.reddy@avagotech.com>,
	Abhijit Mahajan <abhijit.mahajan@avagotech.com>,
	Casey Leedom <leedom@che
To: "Luis R. Rodriguez" <mcgrof@suse.com>
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Hello, Luis.

On Mon, Sep 29, 2014 at 11:22:08PM +0200, Luis R. Rodriguez wrote:
> > > +	/* For now lets avoid stupid bug reports */
> > > +	if (!strcmp(bus->name, "pci") ||
> > > +	    !strcmp(bus->name, "pci_express") ||
> > > +	    !strcmp(bus->name, "hid") ||
> > > +	    !strcmp(bus->name, "sdio") ||
> > > +	    !strcmp(bus->name, "gameport") ||
> > > +	    !strcmp(bus->name, "mmc") ||
> > > +	    !strcmp(bus->name, "i2c") ||
> > > +	    !strcmp(bus->name, "platform") ||
> > > +	    !strcmp(bus->name, "usb"))
> > > +		return true;
> > 
> > Ugh... things like this tend to become permanent.  Do we really need
> > this?  And how are we gonna find out what's broken why w/o bug
> > reports?
> 
> Yeah... well we have two options, one is have something like this to
> at least make it generally useful or remove this and let folks who
> care start fixing async for all modules. The downside to removing
> this is it makes async probe pretty much useless on most systems
> right now, it would mean systemd would have to probably consider
> the list above if they wanted to start using this without expecting
> systems to not work.

So, I'd much prefer blacklist approach if something like this is a
necessity.  That way, we'd at least know what doesn't work.

Thanks.

-- 
tejun