linux-kernel - Re: sysfs/udev broken in latest git?

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Date:	Tue, 24 Jul 2007 10:03:14 +0200
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	Greg KH <gregkh@...e.de>
Cc:	Simon Arlott <simon@...e.lp0.eu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: sysfs/udev broken in latest git?

On Tue, 24 Jul 2007 00:25:40 -0700,
Greg KH <gregkh@...e.de> wrote:

> On Tue, Jul 24, 2007 at 07:39:38AM +0100, Simon Arlott wrote:
> > The following commit appears to break some of my udev rules (I don't 
> > have the time to finish the bisect right now, but there's only four 
> > changes showing in "git bisect visualize" - this one is tagged 
> > bisect/bad, and the other three are docs/docs/unrelated).
> > 
> > Neither of these symlinks get created by udev on kernels marked bad 
> > (see bisect log below):
> > 
> > ACTION=="add", \
> >         KERNEL=="event*", \
> >         SUBSYSTEM=="input", \
> >         SYSFS{description}=="i8042 KBD port", \
> >         NAME="input/%k", \
> >         SYMLINK="input/i8042-kbd", \
> >         MODE="0640", \
> >         GROUP="event"
> > 
> > ACTION=="add", \
> >         KERNEL=="event*", \
> >         SUBSYSTEM=="input", \
> >         SYSFS{manufacturer}=="Logitech", \
> >         SYSFS{product}=="USB-PS/2 Optical Mouse", \
> >         NAME="input/%k", \
> >         SYMLINK="input/logitech-mouse", \
> >         MODE="0640", \
> >         GROUP="event"

> Ugh, I thought this was all fixed up properly :(

I thought this as well :(

But I'm a bit confused: The patch in git has

+       /* only bus-device parents get a "device"-link */
+       if (dev->parent && dev->parent->bus) {
+               error = sysfs_create_link(&dev->kobj, &dev->parent->kobj,
+                                         "device");

and

-               if (parent) {
-                       sysfs_create_link(&dev->kobj, &dev->parent->kobj,
-                                                       "device");

which really look like two different things. (My original patch didn't
have the check for the parent's bus.) Don't know what happened here :(

(Simon: Do the links reappear if you change
	if (dev->parent && dev->parent->bus)
to
	if (dev->parent)
in device_add_class_symlinks()?)
-
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