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6bcf443bce
commit29bb274e94upstream. The PCM core should perform the sync for the pending stop operations at disconnection. Otherwise it may lead to unexpected access. Currently the old user of sync_stop, USB-audio driver, has its own sync, so this isn't needed, but it's better to guarantee the sync in the PCM core level. This patch adds the missing sync_stop call at PCM disconnection callback. It also assures the IRQ sync if it's specified in the card. snd_pcm_sync_stop() is slightly modified to be called also for any PCM substream object now. Fixes:1e850beea2("ALSA: pcm: Add the support for sync-stop operation") Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20210206203656.15959-2-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* pcm_local.h - a local header file for snd-pcm module.
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*
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* Copyright (c) Takashi Sakamoto <o-takashi@sakamocchi.jp>
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*/
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#ifndef __SOUND_CORE_PCM_LOCAL_H
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#define __SOUND_CORE_PCM_LOCAL_H
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extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates;
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void snd_interval_mul(const struct snd_interval *a,
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const struct snd_interval *b, struct snd_interval *c);
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void snd_interval_div(const struct snd_interval *a,
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const struct snd_interval *b, struct snd_interval *c);
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void snd_interval_muldivk(const struct snd_interval *a,
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const struct snd_interval *b,
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unsigned int k, struct snd_interval *c);
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void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
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const struct snd_interval *b, struct snd_interval *c);
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int snd_pcm_hw_constraint_mask(struct snd_pcm_runtime *runtime,
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snd_pcm_hw_param_t var, u_int32_t mask);
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int pcm_lib_apply_appl_ptr(struct snd_pcm_substream *substream,
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snd_pcm_uframes_t appl_ptr);
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int snd_pcm_update_state(struct snd_pcm_substream *substream,
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struct snd_pcm_runtime *runtime);
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int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream);
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void snd_pcm_playback_silence(struct snd_pcm_substream *substream,
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snd_pcm_uframes_t new_hw_ptr);
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static inline snd_pcm_uframes_t
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snd_pcm_avail(struct snd_pcm_substream *substream)
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{
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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return snd_pcm_playback_avail(substream->runtime);
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else
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return snd_pcm_capture_avail(substream->runtime);
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}
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static inline snd_pcm_uframes_t
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snd_pcm_hw_avail(struct snd_pcm_substream *substream)
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{
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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return snd_pcm_playback_hw_avail(substream->runtime);
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else
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return snd_pcm_capture_hw_avail(substream->runtime);
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}
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#ifdef CONFIG_SND_PCM_TIMER
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void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream);
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void snd_pcm_timer_init(struct snd_pcm_substream *substream);
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void snd_pcm_timer_done(struct snd_pcm_substream *substream);
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#else
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static inline void
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snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream) {}
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static inline void snd_pcm_timer_init(struct snd_pcm_substream *substream) {}
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static inline void snd_pcm_timer_done(struct snd_pcm_substream *substream) {}
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#endif
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void __snd_pcm_xrun(struct snd_pcm_substream *substream);
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void snd_pcm_group_init(struct snd_pcm_group *group);
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void snd_pcm_sync_stop(struct snd_pcm_substream *substream, bool sync_irq);
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#ifdef CONFIG_SND_DMA_SGBUF
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struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream,
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unsigned long offset);
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#endif
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#define PCM_RUNTIME_CHECK(sub) snd_BUG_ON(!(sub) || !(sub)->runtime)
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#endif /* __SOUND_CORE_PCM_LOCAL_H */
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