linux-kernel - Re: [patch 2.6.21-rc5-git 1/2] fix hotplug for legacy platform drivers

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Date:	Mon, 2 Apr 2007 13:17:22 -0700
From:	David Brownell <david-b@...bell.net>
To:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>
Cc:	"Greg KH" <gregkh@...e.de>,
	"Linux Kernel list" <linux-kernel@...r.kernel.org>,
	"Andres Salomon" <dilinger@...ian.org>
Subject: Re: [patch 2.6.21-rc5-git 1/2] fix hotplug for legacy platform drivers

On Monday 02 April 2007 1:10 pm, Dmitry Torokhov wrote:
> On 3/31/07, David Brownell <david-b@...bell.net> wrote:
> > @@ -349,6 +360,13 @@ EXPORT_SYMBOL_GPL(platform_device_unregi
> >  *     memory allocated for the device allows drivers using such devices
> >  *     to be unloaded iwithout waiting for the last reference to the device
> >  *     to be dropped.
> > + *
> > + *     This interface is primarily intended for use with legacy drivers
> > + *     which probe hardware directly.  Because such drivers create device
> > + *     nodes themselves, rather than letting system infrastructure handle
> > + *     such device enumeration tasks, they don't fully conform to the Linux
> > + *     driver model.  In particular, when such drivers are built as modules,
> > + *     they can't be "hotplugged".
> >  */
> >  struct platform_device *platform_device_register_simple(char *name, unsigned int id,
> 
> I find this comment misleading. Many of these drivers do not create
> any devices (as in /dev/xxx) but rather create underlying hardware
> abstraction objects.

When I refresh this patch, I'll make it say "create sysfs device nodes" to
make clear which type of device node (not the /dev/ kind) it's referring to.

- Dave
-
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