pcm_close(9)

💖 NAME 💖

pcm_close(9) from the Kernel API Manual is literally the function that implements the close callback function for the PCM middle layer. Slay. 🎀✨

✨ SYNOPSIS ✨

int pcm_close (struct snd_pcm_substream *substream );

🌸 ARGUMENTS 🌸

• substream — sub-stream pointer. That’s the whole argument, bestie — a pointer to the sub-stream. 💅

🦋 DESCRIPTION 🦋

Okay so, obviously, this is called when a PCM substream is closed. Any private instance for a PCM substream allocated in the open callback will be released here. No cap. 💖

Returns 0 on success or error code otherwise. That’s the return story, periodt. 🌈

👀 SEE ALSO 👀

Kernel file: ./drivers/most/most_snd.c

• struct channel(9)
• get_channel(9)
• copy_data(9)
• playback_thread(9)
• pcm_open(9)
• pcm_prepare(9)
• pcm_trigger(9)
• pcm_pointer(9)
• audio_probe_channel(9)
• audio_disconnect_channel(9)
• audio_rx_completion(9)
• audio_tx_completion(9)

Source/version: ./drivers/most · dated October 2026 · this has been pcm_close(9), mwah 💖✨