From: Greg KH <gregkh@linuxfoundation.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: [GIT PULL] Driver core fixes for 5.7-rc7 - take 2
Date: Sun, 24 May 2020 17:38:54 +0200 [thread overview]
Message-ID: <20200524153854.GA5120@kroah.com> (raw)
In-Reply-To: <20200524150018.GB11262@kroah.com>
On Sun, May 24, 2020 at 05:00:18PM +0200, Greg KH wrote:
> On Sat, May 23, 2020 at 11:14:28AM -0700, Linus Torvalds wrote:
> > On Sat, May 23, 2020 at 8:29 AM Greg KH <gregkh@linuxfoundation.org> wrote:
> > >
> > > The kobject patch that was originally in here has now been reverted, as
> > > Guenter reported boot problems with it on some of his systems.
> >
> > Hmm. That original patch looks obviously buggy: in kobject_cleanup()
> > it would end up doing "kobject_put(parent)" regardless of whether it
> > had actually done __kobject_del() or not.
> >
> > That _could_ have been intentional, but considering the commit
> > message, it clearly wasn't in this case. It might be worth re-trying
> > to the commit, just with that fixed.
>
> Turns out that wasn't the real problem here, the culprit is the
> lib/test_printf.c code trying to tear down a kobject tree from the
> parent down to the children (i.e. in the backwards order).
The fix for this is now posted here:
https://lore.kernel.org/lkml/20200524153041.2361-1-gregkh@linuxfoundation.org/
along with a kobject change to emit the remove uevent when the object is
removed from sysfs (and still has a valid parent pointer), and not some
unspecified time in the future.
Let's see if people find this a better solution, and if so, I'll send it
to you later in the week.
thanks,
greg k-h
next prev parent reply other threads:[~2020-05-24 15:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-23 13:17 [GIT PULL] Driver core fixes for 5.7-rc7 Greg KH
2020-05-23 14:05 ` Greg KH
2020-05-23 15:29 ` [GIT PULL] Driver core fixes for 5.7-rc7 - take 2 Greg KH
2020-05-23 18:14 ` Linus Torvalds
2020-05-24 15:00 ` Greg KH
2020-05-24 15:38 ` Greg KH [this message]
2020-05-24 15:42 ` Sasha Levin
2020-05-25 7:33 ` Greg KH
2020-05-24 17:05 ` Linus Torvalds
2020-05-24 19:45 ` Sasha Levin
2020-05-24 21:12 ` Sasha Levin
2020-05-24 22:28 ` Linus Torvalds
2020-05-24 22:24 ` Linus Torvalds
2020-05-25 7:40 ` Greg KH
2020-05-23 18:30 ` pr-tracker-bot
2020-05-23 18:30 ` [GIT PULL] Driver core fixes for 5.7-rc7 pr-tracker-bot
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