From: Cornelia Huck <cornelia.huck@de.ibm.com>
To: Marcel Holtmann <marcel@holtmann.org>
Cc: Greg KH <greg@kroah.com>,
linux-kernel@vger.kernel.org, Greg Kroah-Hartman <gregkh@suse.de>
Subject: Re: [PATCH 32/36] driver core: Introduce device_move(): move a device to a new parent.
Date: Mon, 8 Jan 2007 14:21:48 +0100 [thread overview]
Message-ID: <20070108142148.675a0976@gondolin.boeblingen.de.ibm.com> (raw)
In-Reply-To: <1165332371.2756.23.camel@localhost>
On Tue, 05 Dec 2006 16:26:11 +0100,
Marcel Holtmann <marcel@holtmann.org> wrote:
[sorry about the late reply, but I've been on vacation & offline]
> I was checking why device_move() fails and it seems that the check for
> is_registered is the problem here.
>
> if (!device_is_registered(dev)) {
> error = -EINVAL;
> goto out;
> }
>
> The ACL link has been attached to the Bluetooth bus, but for some reason
> it still thinks that it is unregistered. Is this check really needed. I
> think it should be possible to also move devices that are not part of a
> bus, yet. And removing that check makes it work for me.
Hm, device_is_registered() is always false for devices not belonging to
a bus. I'll remove that check.
> > > > > And shouldn't device_move(dev, NULL) re-attach it to the virtual device
> > > > > tree instead of failing?
> > > >
> > > > Yes, that would be good to have.
> > >
> > > Cornelia, please fix this, because otherwise we can't detach a device
> > > from its parent. Storing the current virtual parent looks racy to me.
> >
> > You can always restore the previous "virtual" parent from the
> > information given to you in the device itself. That is what the code
> > does when it first registers the device.
> >
> > And yes, I too think it should be fixed.
>
> My knowledge of the driver model is still limited. Can you fix that
> quickly. This is really needed.
I'm currently working on a patch. Sorry for the delay, I hope I can get
it out today.
--
Cornelia Huck
Linux for zSeries Developer
Tel.: +49-7031-16-4837, Mail: cornelia.huck@de.ibm.com
prev parent reply other threads:[~2007-01-08 13:20 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-01 23:16 [GIT PATCH] Driver core patches for 2.6.19 Greg KH
2006-12-01 23:21 ` [PATCH 1/36] Driver core: add notification of bus events Greg KH
2006-12-01 23:21 ` [PATCH 2/36] Driver core: fix "driver" symlink timing Greg KH
2006-12-01 23:21 ` [PATCH 3/36] Driver Core: Move virtual_device_parent() to core.c Greg KH
2006-12-01 23:21 ` [PATCH 4/36] CONFIG_SYSFS_DEPRECATED Greg KH
2006-12-01 23:21 ` [PATCH 5/36] Driver core: make old versions of udev work properly Greg KH
2006-12-01 23:21 ` [PATCH 6/36] CONFIG_SYSFS_DEPRECATED - bus symlinks Greg KH
2006-12-01 23:21 ` [PATCH 7/36] CONFIG_SYSFS_DEPRECATED - device symlinks Greg KH
2006-12-01 23:21 ` [PATCH 8/36] CONFIG_SYSFS_DEPRECATED - PHYSDEV* uevent variables Greg KH
2006-12-01 23:21 ` [PATCH 9/36] CONFIG_SYSFS_DEPRECATED - class symlinks Greg KH
2006-12-01 23:21 ` [PATCH 10/36] Driver core: convert vt code to use struct device Greg KH
2006-12-01 23:21 ` [PATCH 11/36] Driver core: convert vc " Greg KH
2006-12-01 23:21 ` [PATCH 12/36] Driver core: change misc class_devices to be real devices Greg KH
2006-12-01 23:21 ` [PATCH 13/36] Driver core: convert tty core to use struct device Greg KH
2006-12-01 23:21 ` [PATCH 14/36] Driver core: convert raw device code " Greg KH
2006-12-01 23:21 ` [PATCH 15/36] I2C: convert i2c-dev to use struct device instead of struct class_device Greg KH
2006-12-01 23:21 ` [PATCH 16/36] Driver core: convert msr code to use struct device Greg KH
2006-12-01 23:21 ` [PATCH 17/36] Driver core: convert cpuid " Greg KH
2006-12-01 23:21 ` [PATCH 18/36] Driver core: convert PPP " Greg KH
2006-12-01 23:21 ` [PATCH 19/36] Driver core: convert ppdev " Greg KH
2006-12-01 23:21 ` [PATCH 20/36] Driver core: convert mmc " Greg KH
2006-12-01 23:21 ` [PATCH 21/36] Driver core: convert firmware " Greg KH
2006-12-01 23:21 ` [PATCH 22/36] Driver core: convert fb " Greg KH
2006-12-01 23:21 ` [PATCH 23/36] Driver core: change mem class_devices to be real devices Greg KH
2006-12-01 23:21 ` [PATCH 24/36] Driver core: convert sound core to use struct device Greg KH
2006-12-01 23:21 ` [PATCH 25/36] Driver core: add dev_archdata to " Greg KH
2006-12-01 23:21 ` [PATCH 26/36] ACPI: Change ACPI to use dev_archdata instead of firmware_data Greg KH
2006-12-01 23:21 ` [PATCH 27/36] Driver core: Call platform_notify_remove later Greg KH
2006-12-01 23:21 ` [PATCH 28/36] cpu topology: consider sysfs_create_group return value Greg KH
2006-12-01 23:21 ` [PATCH 29/36] sysfs: sysfs_write_file() writes zero terminated data Greg KH
2006-12-01 23:22 ` [PATCH 30/36] driver core: Introduce device_find_child() Greg KH
2006-12-01 23:22 ` [PATCH 31/36] Driver core: make drivers/base/core.c:setup_parent() static Greg KH
2006-12-01 23:22 ` [PATCH 32/36] driver core: Introduce device_move(): move a device to a new parent Greg KH
2006-12-01 23:22 ` [PATCH 33/36] driver core: Use klist_remove() in device_move() Greg KH
2006-12-01 23:22 ` [PATCH 34/36] Driver core: platform_driver_probe(), can save codespace Greg KH
2006-12-01 23:22 ` [PATCH 35/36] Documentation/driver-model/platform.txt update/rewrite Greg KH
2006-12-01 23:22 ` [PATCH 36/36] Driver core: show drivers in /sys/module/ Greg KH
2006-12-03 16:26 ` [PATCH 32/36] driver core: Introduce device_move(): move a device to a new parent Marcel Holtmann
2006-12-04 19:58 ` Greg KH
2006-12-04 21:15 ` Marcel Holtmann
2006-12-04 23:05 ` Greg KH
2006-12-05 15:26 ` Marcel Holtmann
2006-12-06 5:58 ` Greg KH
2006-12-06 8:29 ` Marcel Holtmann
2006-12-06 9:03 ` Martin Schwidefsky
2007-01-08 13:21 ` Cornelia Huck [this message]
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