usb_queue_reset_device(9)

💅 usb_queue_reset_device — Kernel API Manual

okay so bestie, welcome to usb_queue_reset_device(9) 💖 this one's a little kernel-side baddie that lets you reset a USB device from an atomic context. yes, atomic. the place where usb_reset_device simply cannot go. let's get into it 🎀

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✨ SYNOPSIS ✨

void usb_queue_reset_device (struct usb_interface *iface );

🌸 ARGUMENTS 🌸

• iface — the USB interface that belongs to the device you're tryna reset. that's it, that's the whole input 🫶

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👑 DESCRIPTION 👑

so here's the vibe: this function resets a USB device from an atomic context — the exact spot where usb_reset_device won't work, because it blocks, and blocking in atomic context is a no-no 🙈

Doing a reset this way is functionally equivalent to calling usb_reset_device… with one iconic little twist: it's delayed to a workqueue. that delay is lowkey the whole point. and because of it, any drivers bound to other interfaces might get unbound, and so might users coming from usbfs in user space. so like, it's giving consequences 💀

🦋 corner cases (the plot twists)

• Scheduling two resets at the same time from two different drivers, attached to two different interfaces of the same device, is possible — ngl, depending on how the driver attached to each interface handles ->pre_reset, the second reset might happen or it might not. no promises, bestie ✨
• If the reset gets delayed so long that the interface ends up unbound from its driver, the reset will be skipped. gone. not happening. 🫠
• This function can be called during .probe. it can also be called during .disconnect, but honestly doing that is pointless, because the reset will not occur. so what's the move? if you really want to reset the device during .disconnect, call usb_reset_device directly — but watch out for nested unbinding issues, fr fr ⚠️

the way that atomic context changes everything… call the queue version when you're stuck somewhere you can't block, and remember the reset is happening later, not now 💅

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⭐ SEE ALSO ⭐

Kernel file ./drivers/usb/core/hub.c, plus the whole friend group:

• usb_hub_set_port_power(9)
• usb_hub_clear_tt_buffer(9)
• usb_remove_device(9)
• usb_set_device_state(9)
• usb_disconnect(9)
• usb_enumerate_device_otg(9)
• usb_enumerate_device(9)
• usb_new_device(9)
• usb_deauthorize_device(9)
• get_port_ssp_rate(9)
• usb_root_hub_lost_power(9)
• hub_hc_release_resources(9)
• usb_reset_and_verify_device(9)
• usb_reset_device(9)
• usb_hub_find_child(9)
• usb_get_hub_port_acpi_handle(9)

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okay that's the whole page, you ate that 🍓 this one lives in the Kernel API Manual, straight outta ./drivers/usb/core, dated October 2026 — mwah, go reset something (later, on a workqueue) 💜✨