cgroup: don't online subsystems before cgroup_name/path() are operational

While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out
cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems
before the new cgroup is associated with it kernfs_node.  This is fine
for cgroup proper but cgroup_name/path() depend on the associated
kernfs_node and if a subsystem makes the new cgroup_subsys_state
visible, which they're allowed to after onlining, it can lead to NULL
dereference.

The current code performs cgroup creation and subsystem onlining in
cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems
visible afterwards.  There's no reason to online the subsystems early
and we can simply drop cgroup_apply_control_enable() call from
cgroup_create() so that the subsystems are onlined and made visible at
the same time.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") 
Cc: stable@vger.kernel.org # v4.6+

path: root/sound/soc/adi/Kconfig

config SND_SOC_ADI
	tristate "Audio support for Analog Devices reference designs"
	depends on MICROBLAZE || ARCH_ZYNQ || COMPILE_TEST
	help
	  Audio support for various reference designs by Analog Devices.

config SND_SOC_ADI_AXI_I2S
	tristate "AXI-I2S support"
	depends on SND_SOC_ADI
	select SND_SOC_GENERIC_DMAENGINE_PCM
	select REGMAP_MMIO
	help
	  ASoC driver for the Analog Devices AXI-I2S softcore peripheral.

config SND_SOC_ADI_AXI_SPDIF
	tristate "AXI-SPDIF support"
	depends on SND_SOC_ADI
	select SND_SOC_GENERIC_DMAENGINE_PCM
	select REGMAP_MMIO
	help
	  ASoC driver for the Analog Devices AXI-SPDIF softcore peripheral.