virtsnd_pcm_sync_stop(9)

📦 version 7.3.1, in nixpkgs unstable

💅 virtsnd_pcm_sync_stop — bestie's guide to stopping a PCM substream 💅

okay so welcome to the Kernel API Manual bestie, today we're doing virtsnd_pcm_sync_stop and honestly? she's short but she eats. let's go 🎀

✨ NAME ✨

virtsnd_pcm_sync_stop — the Synchronous PCM substream stop. yes that's literally the whole vibe: she stops the substream, synchronously, no chaos, no cap 💅

🌸 SYNOPSIS 🌸

int virtsnd_pcm_sync_stop (struct snd_pcm_substream *substream );

like, that's it. one arg, one int, iconic behavior 🦋

🎀 ARGUMENTS 🎀

  • substream — the Kernel ALSA substream. that's your girl. hand her over and let the function do her thing ✨

💖 DESCRIPTION 💖

so here's the tea: this function can be called both from the upper level or from the driver itself. both. it's giving versatility, it's giving main character energy, she's welcome everywhere 🫶

🔥 CONTEXT 🔥

Process context. and heads up — she takes and releases the VirtIO substream spinlock. so like, she's locking, she's unlocking, she's doing the most, but she handles it herself, you don't gotta micromanage her fr fr 💀

ngl, remember the spinlock is in play here — that's not a vibe you want to forget about 😭

⭐ RETURN ⭐

  • 0 on success 🎉 slay
  • -errno on failure 💀 and yes, -errno exactly, not some made-up number, iykyk

🌈 SEE ALSO 🌈

all my girls in the Kernel file ./sound/virtio/virtio_pcm_ops.c — go say hi to the whole friend group:

and that's the whole page bestie ✨ this one came straight out of ./sound/virtio, dated October 2026, and it's literally titled virtsnd_pcm_sync_stop(9) — so go forth, stop those substreams synchronously, and remember: take and release that spinlock with confidence 👑💜🍓

📦 where this page comes from