52645e332d
dpcm_path_put() (A) is calling kfree(*list).
The freed list is created by dapm_widget_list_create() (B) which is called
from snd_soc_dapm_dai_get_connected_widgets() (C) which is called from
dpcm_path_get() (D).
(B) dapm_widget_list_create(**list, ...)
{
...
=> *list = kzalloc();
...
}
(C) snd_soc_dapm_dai_get_connected_widgets(..., **list, ...)
{
...
dapm_widget_list_create(list, ...);
...
}
(D) dpcm_path_get(..., **list)
{
...
snd_soc_dapm_dai_get_connected_widgets(..., list, ...);
...
}
(A) dpcm_path_put(**list)
{
=> kfree(*list);
}
This kind of unbalance code is very difficult to read/understand.
To avoid this issue, this patch adds each missing paired function
dapm_widget_list_free() for dapm_widget_list_create() (B), and
snd_soc_dapm_dai_free_widgets() for snd_soc_dapm_dai_get_connected_widgets() (C).
This patch uses these, and moves dpcm_path_put() next to dpcm_path_get().
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87a75fjc9q.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
163 lines
4.8 KiB
C
163 lines
4.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* linux/sound/soc-dpcm.h -- ALSA SoC Dynamic PCM Support
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*
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* Author: Liam Girdwood <lrg@ti.com>
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*/
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#ifndef __LINUX_SND_SOC_DPCM_H
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#define __LINUX_SND_SOC_DPCM_H
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#include <linux/slab.h>
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#include <linux/list.h>
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#include <sound/pcm.h>
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struct snd_soc_pcm_runtime;
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/*
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* Types of runtime_update to perform. e.g. originated from FE PCM ops
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* or audio route changes triggered by muxes/mixers.
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*/
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enum snd_soc_dpcm_update {
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SND_SOC_DPCM_UPDATE_NO = 0,
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SND_SOC_DPCM_UPDATE_BE,
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SND_SOC_DPCM_UPDATE_FE,
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};
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/*
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* Dynamic PCM Frontend -> Backend link management states.
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*/
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enum snd_soc_dpcm_link_state {
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SND_SOC_DPCM_LINK_STATE_NEW = 0, /* newly created link */
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SND_SOC_DPCM_LINK_STATE_FREE, /* link to be dismantled */
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};
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/*
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* Dynamic PCM Frontend -> Backend link PCM states.
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*/
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enum snd_soc_dpcm_state {
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SND_SOC_DPCM_STATE_NEW = 0,
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SND_SOC_DPCM_STATE_OPEN,
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SND_SOC_DPCM_STATE_HW_PARAMS,
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SND_SOC_DPCM_STATE_PREPARE,
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SND_SOC_DPCM_STATE_START,
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SND_SOC_DPCM_STATE_STOP,
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SND_SOC_DPCM_STATE_PAUSED,
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SND_SOC_DPCM_STATE_SUSPEND,
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SND_SOC_DPCM_STATE_HW_FREE,
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SND_SOC_DPCM_STATE_CLOSE,
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};
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/*
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* Dynamic PCM trigger ordering. Triggering flexibility is required as some
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* DSPs require triggering before/after their CPU platform and DAIs.
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*
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* i.e. some clients may want to manually order this call in their PCM
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* trigger() whilst others will just use the regular core ordering.
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*/
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enum snd_soc_dpcm_trigger {
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SND_SOC_DPCM_TRIGGER_PRE = 0,
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SND_SOC_DPCM_TRIGGER_POST,
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SND_SOC_DPCM_TRIGGER_BESPOKE,
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};
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/*
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* Dynamic PCM link
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* This links together a FE and BE DAI at runtime and stores the link
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* state information and the hw_params configuration.
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*/
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struct snd_soc_dpcm {
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/* FE and BE DAIs*/
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struct snd_soc_pcm_runtime *be;
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struct snd_soc_pcm_runtime *fe;
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/* link state */
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enum snd_soc_dpcm_link_state state;
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/* list of BE and FE for this DPCM link */
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struct list_head list_be;
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struct list_head list_fe;
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/* hw params for this link - may be different for each link */
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struct snd_pcm_hw_params hw_params;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_state;
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#endif
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};
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/*
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* Dynamic PCM runtime data.
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*/
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struct snd_soc_dpcm_runtime {
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struct list_head be_clients;
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struct list_head fe_clients;
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int users;
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struct snd_pcm_runtime *runtime;
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struct snd_pcm_hw_params hw_params;
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/* state and update */
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enum snd_soc_dpcm_update runtime_update;
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enum snd_soc_dpcm_state state;
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int trigger_pending; /* trigger cmd + 1 if pending, 0 if not */
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};
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#define for_each_dpcm_fe(be, stream, _dpcm) \
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list_for_each_entry(_dpcm, &(be)->dpcm[stream].fe_clients, list_fe)
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#define for_each_dpcm_be(fe, stream, _dpcm) \
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list_for_each_entry(_dpcm, &(fe)->dpcm[stream].be_clients, list_be)
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#define for_each_dpcm_be_safe(fe, stream, _dpcm, __dpcm) \
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list_for_each_entry_safe(_dpcm, __dpcm, &(fe)->dpcm[stream].be_clients, list_be)
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#define for_each_dpcm_be_rollback(fe, stream, _dpcm) \
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list_for_each_entry_continue_reverse(_dpcm, &(fe)->dpcm[stream].be_clients, list_be)
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/* can this BE stop and free */
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int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* can this BE perform a hw_params() */
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int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* is the current PCM operation for this FE ? */
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int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream);
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/* is the current PCM operation for this BE ? */
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int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
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struct snd_soc_pcm_runtime *be, int stream);
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/* get the substream for this BE */
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struct snd_pcm_substream *
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snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream);
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/* internal use only */
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int soc_dpcm_runtime_update(struct snd_soc_card *);
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#ifdef CONFIG_DEBUG_FS
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void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
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#else
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static inline void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
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{
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}
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#endif
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int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
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int stream, struct snd_soc_dapm_widget_list **list_);
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void dpcm_path_put(struct snd_soc_dapm_widget_list **list);
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int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,
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int stream, struct snd_soc_dapm_widget_list **list, int new);
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int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_be_dai_shutdown(struct snd_soc_pcm_runtime *fe, int stream);
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void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream);
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void dpcm_clear_pending_state(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_be_dai_hw_free(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_be_dai_hw_params(struct snd_soc_pcm_runtime *fe, int tream);
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int dpcm_be_dai_trigger(struct snd_soc_pcm_runtime *fe, int stream, int cmd);
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int dpcm_be_dai_prepare(struct snd_soc_pcm_runtime *fe, int stream);
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int dpcm_dapm_stream_event(struct snd_soc_pcm_runtime *fe, int dir,
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int event);
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#endif
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