snd_dmaengine_pcm_close(9)

✨ snd_dmaengine_pcm_close ✨

okay bestie, so this is a page out of the Kernel API Manual — yes, the real one, the snd_dmaengine_pcm_close(9) glow-up 🎀 — and it's literally just one tiny function that closes out a dmaengine-based PCM substream. short king behavior, we love to see it 💅

---

🌸 NAME 🌸

snd_dmaengine_pcm_close — close a dmaengine based PCM substream. that's it, that's the whole vibe. she does one thing and she does it iconically 🦋

---

🫶 SYNOPSIS 🫶

int snd_dmaengine_pcm_close (struct snd_pcm_substream *substream );

like, look at her. one parameter. no drama. main character energy fr fr 🔥

---

💖 ARGUMENTS 💖

• substream — the PCM substream. that's the thing you're closing, bestie, the actual substream in question. she's the whole point of the function, no cap 🎀

---

⭐ RETURN ⭐

0 on success, and a negative error code otherwise. so like — zero means slay, anything negative means something went sideways and you should probably go look at it 😭

---

🦋 SEE ALSO 🦋

the whole friend group, honestly. the kernel file lives right here:

• Kernel file ./sound/core/pcm_dmaengine.c

and then the rest of the crew, all of them, in order, no skips 👑

• snd_hwparams_to_dma_slave_config(9)
• snd_dmaengine_pcm_set_config_from_dai_data(9)
• snd_dmaengine_pcm_trigger(9)
• snd_dmaengine_pcm_pointer_no_residue(9)
• snd_dmaengine_pcm_pointer(9)
• snd_dmaengine_pcm_request_channel(9)
• snd_dmaengine_pcm_open(9)
• snd_dmaengine_pcm_close_release_chan(9)
• snd_dmaengine_pcm_refine_runtime_hwparams(9)

ngl if you're reading snd_dmaengine_pcm_close you probably want snd_dmaengine_pcm_open(9) too — they're giving matched set 💅

---

and that's the whole page, bestie!! 💜 sourced from ./sound/core, dated October 2026, and shipped in the Kernel API Manual under snd_dmaengine_pcm_close(9). go close that substream, periodt 🎀✨