From: Jeffy Chen <jeffy.chen@rock-chips.com>
To: linux-kernel@vger.kernel.org
Cc: briannorris@chromium.org, heiko@sntech.de,
gregkh@linuxfoundation.org, dmitry.torokhov@gmail.com,
rjw@rjwysocki.net, dianders@chromium.org, tfiga@chromium.org,
broonie@kernel.org, seanpaul@chromium.org,
thierry.reding@gmail.com, Jeffy Chen <jeffy.chen@rock-chips.com>
Subject: [PATCH v3] driver core: Move device_links_purge() after bus_remove_device()
Date: Fri, 20 Oct 2017 09:23:16 +0800 [thread overview]
Message-ID: <20171020012316.30154-1-jeffy.chen@rock-chips.com> (raw)
The current ordering of code in device_del() triggers a WARN_ON()
in device_links_purge(), because of an unexpected link status.
The device_links_unbind_consumers() call in device_release_driver()
has to take place before device_links_purge() for the status of all
links to be correct, so move the device_links_purge() call in
device_del() after the invocation of bus_remove_device() which calls
device_release_driver().
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
Changes in v3:
Remove wrong signed-off-by.
Changes in v2:
Update commit message provided by Rafael.
drivers/base/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 12ebd055724c..2e683cdf4a08 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1958,7 +1958,6 @@ void device_del(struct device *dev)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_DEL_DEVICE, dev);
- device_links_purge(dev);
dpm_sysfs_remove(dev);
if (parent)
klist_del(&dev->p->knode_parent);
@@ -1986,6 +1985,7 @@ void device_del(struct device *dev)
device_pm_remove(dev);
driver_deferred_probe_del(dev);
device_remove_properties(dev);
+ device_links_purge(dev);
/* Notify the platform of the removal, in case they
* need to do anything...
--
2.11.0
next reply other threads:[~2017-10-20 1:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-20 1:23 Jeffy Chen [this message]
2017-10-20 1:22 ` [PATCH v3] driver core: Move device_links_purge() after bus_remove_device() Rafael J. Wysocki
2017-10-20 6:22 ` Greg KH
2017-10-20 11:17 ` Rafael J. Wysocki
2017-10-20 12:01 ` jeffy
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