usb_wait_an...mpty_timeout(9)

🌸 usb_wait_anchor_empty_timeout(9) 🌸

okay bestie, this little icon lives in the Kernel API Manual, and it's basically the "are we done here?" checkpoint for USB anchors. no cap, it's giving patient-waiting main character energy 💅✨

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💖 NAME 💖

usb_wait_anchor_empty_timeout — wait for an anchor to be unused 🫶

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🌟 SYNOPSIS 🌟

int usb_wait_anchor_empty_timeout (struct usb_anchor *anchor , unsigned int timeout );

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🎀 ARGUMENTS 🎀

• anchor — the anchor you want to become unused 👑
• timeout — how long you are willing to wait in milliseconds ⏳

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🦋 DESCRIPTION 🦋

Call this if you want to be sure all of an anchor's URBs have finished. literally the "everybody out of the pool?" check 💦

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🔥 RETURN 🔥

Non-zero if the anchor became unused. Zero on timeout. periodt 💀

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🌈 SEE ALSO 🌈

Kernel file ./drivers/usb/core/urb.c — and the whole USB urb squad:

• usb_init_urb(9)
• usb_alloc_urb(9)
• usb_free_urb(9)
• usb_get_urb(9)
• usb_anchor_urb(9)
• usb_unanchor_urb(9)
• usb_pipe_type_check(9)
• usb_urb_ep_type_check(9)
• usb_submit_urb(9)
• usb_unlink_urb(9)
• usb_kill_urb(9)
• usb_poison_urb(9)
• usb_block_urb(9)
• usb_kill_anchored_urbs(9)
• usb_poison_anchored_urbs(9)
• usb_unpoison_anchored_urbs(9)
• usb_anchor_suspend_wakeups(9)
• usb_anchor_resume_wakeups(9)
• usb_get_from_anchor(9)
• usb_scuttle_anchored_urbs(9)
• usb_anchor_empty(9)

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this page comes from ./drivers/usb/core, dated October 2026 — mwah, go wait on that anchor bestie 💖🦋✨