/*
* linux/sound/cs42l56.h -- Platform data for CS42L56
*
* Copyright (c) 2014 Cirrus Logic Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __CS42L56_H
#define __CS42L56_H
struct cs42l56_platform_data {
/* GPIO for Reset */
unsigned int gpio_nreset;
/* MICBIAS Level. Check datasheet Pg48 */
unsigned int micbias_lvl;
/* Analog Input 1A Reference 0=Single 1=Pseudo-Differential */
unsigned int ain1a_ref_cfg;
/* Analog Input 2A Reference 0=Single 1=Pseudo-Differential */
unsigned int ain2a_ref_cfg;
/* Analog Input 1B Reference 0=Single 1=Pseudo-Differential */
unsigned int ain1b_ref_cfg;
/* Analog Input 2B Reference 0=Single 1=Pseudo-Differential */
unsigned int ain2b_ref_cfg;
/* Charge Pump Freq. Check datasheet Pg62 */
unsigned int chgfreq;
/* HighPass Filter Right Channel Corner Frequency */
unsigned int hpfb_freq;
/* HighPass Filter Left Channel Corner Frequency */
unsigned int hpfa_freq;
/* Adaptive Power Control for LO/HP */
unsigned int adaptive_pwr;
};
#endif /* __CS42L56_H */
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+