linux/drivers/base
Dan Williams c23106d427 drivers/base: Introduce kill_device()
commit 00289cd876 upstream.

The libnvdimm subsystem arranges for devices to be destroyed as a result
of a sysfs operation. Since device_unregister() cannot be called from
an actively running sysfs attribute of the same device libnvdimm
arranges for device_unregister() to be performed in an out-of-line async
context.

The driver core maintains a 'dead' state for coordinating its own racing
async registration / de-registration requests. Rather than add local
'dead' state tracking infrastructure to libnvdimm device objects, export
the existing state tracking via a new kill_device() helper.

The kill_device() helper simply marks the device as dead, i.e. that it
is on its way to device_del(), or returns that the device was already
dead. This can be used in advance of calling device_unregister() for
subsystems like libnvdimm that might need to handle multiple user
threads racing to delete a device.

This refactoring does not change any behavior, but it is a pre-requisite
for follow-on fixes and therefore marked for -stable.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Fixes: 4d88a97aa9 ("libnvdimm, nvdimm: dimm driver and base libnvdimm device-driver...")
Cc: <stable@vger.kernel.org>
Tested-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/156341207332.292348.14959761496009347574.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-08-09 17:52:28 +02:00
..
firmware_loader firmware: improve LSM/IMA security behaviour 2019-07-21 09:03:03 +02:00
power
regmap regmap: fix bulk writes on paged registers 2019-07-26 09:14:06 +02:00
test
arch_topology.c
attribute_container.c
base.h driver core: Establish order of operations for device_add and device_del via bitflag 2019-08-09 17:52:28 +02:00
bus.c
cacheinfo.c drivers: base: cacheinfo: Ensure cpu hotplug work is done before Intel RDT 2019-07-21 09:03:03 +02:00
class.c
component.c
container.c
core.c drivers/base: Introduce kill_device() 2019-08-09 17:52:28 +02:00
cpu.c
dd.c driver core: Establish order of operations for device_add and device_del via bitflag 2019-08-09 17:52:28 +02:00
devcon.c
devcoredump.c
devres.c
devtmpfs.c
driver.c
firmware.c
hypervisor.c
init.c
isa.c
Kconfig
Makefile
map.c
memory.c
module.c
node.c
pinctrl.c
platform-msi.c
platform.c
property.c
soc.c
syscore.c
topology.c
transport_class.c