dwc2_do_unreserve(9)

✨ NAME ✨

okay so bestie, this is the Kernel API Manual page for dwc2_do_unreserve(9) — and the name is literally giving what it is: dwc2_do_unreserve — Actually release the periodic reservation. periodt. 💅

📜 SYNOPSIS 📜

the whole signature is right here, copy-paste safe and iconic:

void dwc2_do_unreserve (struct dwc2_hsotg *hsotg , struct dwc2_qh *qh );

🎀 ARGUMENTS 🎀

• hsotg — the HCD state structure for the DWC OTG controller, iykyk 🦋
• qh — the QH for the periodic transfer. main character energy fr fr 💖

💖 DESCRIPTION 💖

so dwc2_do_unreserve does the thing the name promises: it actually releases the periodic bandwidth that was reserved by the given qh. no cap, that's the whole plot. 💀✨

🌈 SEE ALSO 🌈

the whole friend group, assembled:

• Kernel file ./drivers/usb/dwc2/hcd_queue.c
• dwc2_periodic_channel_available(9)
• dwc2_check_periodic_bandwidth(9)
• pmap_schedule(9)
• pmap_unschedule(9)
• dwc2_get_ls_map(9)
• dwc2_qh_print(9)
• dwc2_qh_schedule_print(9)
• dwc2_ls_pmap_schedule(9)
• dwc2_ls_pmap_unschedule(9)
• dwc2_hs_pmap_schedule(9)
• dwc2_hs_pmap_unschedule(9)
• dwc2_uframe_schedule_split(9)
• dwc2_uframe_schedule_hs(9)
• dwc2_uframe_schedule_ls(9)
• dwc2_uframe_schedule(9)
• dwc2_uframe_unschedule(9)
• dwc2_pick_first_frame(9)
• dwc2_do_reserve(9)
• dwc2_unreserve_timer_fn(9)
• dwc2_check_max_xfer_size(9)
• dwc2_schedule_periodic(9)
• dwc2_deschedule_periodic(9)
• dwc2_wait_timer_fn(9)
• dwc2_qh_init(9)
• dwc2_hcd_qh_create(9)
• dwc2_hcd_qh_free(9)
• dwc2_hcd_qh_add(9)
• dwc2_hcd_qh_unlink(9)
• dwc2_next_for_periodic_split(9)
• dwc2_next_periodic_start(9)
• dwc2_hcd_qtd_init(9)
• dwc2_hcd_qtd_add(9)

okay bye bestie — this came from source/version ./drivers/usb/dwc2, dated October 2026, and it’s the dwc2_do_unreserve(9) page. slay. 💖✨