mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 04:02:20 +00:00
1b6a6fc528
It is possible when using ASoC that input_dev is unregistered while calling snd_jack_report, which causes NULL pointer dereference. In order to prevent this serialize access to input_dev using mutex lock. Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com> Link: https://lore.kernel.org/r/20220412091628.3056922-1-amadeuszx.slawinski@linux.intel.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#ifndef __SOUND_JACK_H
|
|
#define __SOUND_JACK_H
|
|
|
|
/*
|
|
* Jack abstraction layer
|
|
*
|
|
* Copyright 2008 Wolfson Microelectronics plc
|
|
*/
|
|
|
|
#include <sound/core.h>
|
|
|
|
struct input_dev;
|
|
|
|
/**
|
|
* enum snd_jack_types - Jack types which can be reported
|
|
* @SND_JACK_HEADPHONE: Headphone
|
|
* @SND_JACK_MICROPHONE: Microphone
|
|
* @SND_JACK_HEADSET: Headset
|
|
* @SND_JACK_LINEOUT: Line out
|
|
* @SND_JACK_MECHANICAL: Mechanical switch
|
|
* @SND_JACK_VIDEOOUT: Video out
|
|
* @SND_JACK_AVOUT: AV (Audio Video) out
|
|
* @SND_JACK_LINEIN: Line in
|
|
* @SND_JACK_BTN_0: Button 0
|
|
* @SND_JACK_BTN_1: Button 1
|
|
* @SND_JACK_BTN_2: Button 2
|
|
* @SND_JACK_BTN_3: Button 3
|
|
* @SND_JACK_BTN_4: Button 4
|
|
* @SND_JACK_BTN_5: Button 5
|
|
*
|
|
* These values are used as a bitmask.
|
|
*
|
|
* Note that this must be kept in sync with the lookup table in
|
|
* sound/core/jack.c.
|
|
*/
|
|
enum snd_jack_types {
|
|
SND_JACK_HEADPHONE = 0x0001,
|
|
SND_JACK_MICROPHONE = 0x0002,
|
|
SND_JACK_HEADSET = SND_JACK_HEADPHONE | SND_JACK_MICROPHONE,
|
|
SND_JACK_LINEOUT = 0x0004,
|
|
SND_JACK_MECHANICAL = 0x0008, /* If detected separately */
|
|
SND_JACK_VIDEOOUT = 0x0010,
|
|
SND_JACK_AVOUT = SND_JACK_LINEOUT | SND_JACK_VIDEOOUT,
|
|
SND_JACK_LINEIN = 0x0020,
|
|
|
|
/* Kept separate from switches to facilitate implementation */
|
|
SND_JACK_BTN_0 = 0x4000,
|
|
SND_JACK_BTN_1 = 0x2000,
|
|
SND_JACK_BTN_2 = 0x1000,
|
|
SND_JACK_BTN_3 = 0x0800,
|
|
SND_JACK_BTN_4 = 0x0400,
|
|
SND_JACK_BTN_5 = 0x0200,
|
|
};
|
|
|
|
/* Keep in sync with definitions above */
|
|
#define SND_JACK_SWITCH_TYPES 6
|
|
|
|
struct snd_jack {
|
|
struct list_head kctl_list;
|
|
struct snd_card *card;
|
|
const char *id;
|
|
#ifdef CONFIG_SND_JACK_INPUT_DEV
|
|
struct input_dev *input_dev;
|
|
struct mutex input_dev_lock;
|
|
int registered;
|
|
int type;
|
|
char name[100];
|
|
unsigned int key[6]; /* Keep in sync with definitions above */
|
|
#endif /* CONFIG_SND_JACK_INPUT_DEV */
|
|
int hw_status_cache;
|
|
void *private_data;
|
|
void (*private_free)(struct snd_jack *);
|
|
};
|
|
|
|
#ifdef CONFIG_SND_JACK
|
|
|
|
int snd_jack_new(struct snd_card *card, const char *id, int type,
|
|
struct snd_jack **jack, bool initial_kctl, bool phantom_jack);
|
|
int snd_jack_add_new_kctl(struct snd_jack *jack, const char * name, int mask);
|
|
#ifdef CONFIG_SND_JACK_INPUT_DEV
|
|
void snd_jack_set_parent(struct snd_jack *jack, struct device *parent);
|
|
int snd_jack_set_key(struct snd_jack *jack, enum snd_jack_types type,
|
|
int keytype);
|
|
#endif
|
|
void snd_jack_report(struct snd_jack *jack, int status);
|
|
|
|
#else
|
|
static inline int snd_jack_new(struct snd_card *card, const char *id, int type,
|
|
struct snd_jack **jack, bool initial_kctl, bool phantom_jack)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int snd_jack_add_new_kctl(struct snd_jack *jack, const char * name, int mask)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void snd_jack_report(struct snd_jack *jack, int status)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
#if !defined(CONFIG_SND_JACK) || !defined(CONFIG_SND_JACK_INPUT_DEV)
|
|
static inline void snd_jack_set_parent(struct snd_jack *jack,
|
|
struct device *parent)
|
|
{
|
|
}
|
|
|
|
static inline int snd_jack_set_key(struct snd_jack *jack,
|
|
enum snd_jack_types type,
|
|
int keytype)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* !CONFIG_SND_JACK || !CONFIG_SND_JACK_INPUT_DEV */
|
|
|
|
#endif
|