4.14-stable review patch. If anyone has any objections, please let me know.
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From: Jeffy Chen jeffy.chen@rock-chips.com
commit 2ec16150179888b81717d1d3ce84e634f4736af2 upstream.
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().
Fixes: 9ed9895370ae (driver core: Functional dependencies tracking support) Signed-off-by: Jeffy Chen jeffy.chen@rock-chips.com Reviewed-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/base/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -1973,7 +1973,6 @@ 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); @@ -2001,6 +2000,7 @@ 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...