playback_urb_complete(9)

✨ playback_urb_complete(9) ✨

okay bestie, welcome to the Kernel API Manual entry for playback_urb_complete(9) — yes that's the manual name, and yes it's giving very specific USB audio fairy vibes 🧚‍♀️. This one is short but lowkey iconic.

🌸 NAME 🌸

playback_urb_complete — completion handler for playback isochronous URBs. That's the whole job title, and it ate 💅.

✨ SYNOPSIS ✨

void playback_urb_complete (struct urb *urb );

🎀 ARGUMENTS 🎀

• urb — the completed URB. That's it, that's the girl. 🫶

💅 DESCRIPTION 💅

okay so boom: this function runs in interrupt context — like, it is literally in the interrupt-context group chat, no cap. 😭

While it's there, it calculates the number of bytes to send in the next set of packets based on the feedback-driven clock, copies the audio data from the ALSA ring buffer, and resubmits the URB. It's giving busy, booked, and resubmitting 💖. Every part is doing its little task, and the vibe is very "main character handling playback isochronous URBs" ✨.

🔥 SEE ALSO 🔥

bestie, the cross-reference section is stacked — literally all these are linked in the kernel lore:

• Kernel file ./sound/usb/usx2y/us144mkii_pcm.h
• var tascam_pcm_hw(9)
• var tascam_playback_ops(9)
• var tascam_capture_ops(9)
• feedback_urb_complete(9)
• capture_urb_complete(9)
• tascam_stop_pcm_work_handler(9)
• tascam_init_pcm(9)
• us144mkii_configure_device_for_rate(9)
• process_playback_routing_us144mkii(9)
• process_capture_routing_us144mkii(9)
• tascam_pcm_hw_params(9)
• tascam_pcm_hw_free(9)
• tascam_pcm_trigger(9)
• tascam_capture_work_handler(9)

no cap, that's the whole page — every detail is here, and the completion-handler energy is immaculate 🌈

signed, sealed, and resubmitted with love: ./sound/usb/usx2y · October 2026 · playback_urb_complete(9) 🫶💖