xhci_sideban...terrupter_id(9)

💖 xhci_sideband_interrupter_id(9) 💖

okay so bestie, welcome to the Kernel API Manual — we're talking about xhci_sideband_interrupter_id(9) today and honestly? she's a tiny function with main character energy. let's get into it 🎀

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✨ NAME ✨

xhci_sideband_interrupter_id — returns the interrupter target id. that's it, that's the whole gig 💅

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🌸 SYNOPSIS 🌸

int xhci_sideband_interrupter_id (struct xhci_sideband *sb );

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🦋 ARGUMENTS 🦋

• sb — the sideband instance for this usb device. like, the specific one you're working with. no cap 🫶

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⭐ DESCRIPTION ⭐

so here's the vibe: if a secondary xhci interrupter has been set up for this usb device, this function hands you back the ID that the interrupter is using. iconic behavior.

and why do you care? because the sideband client needs to write that ID into the 'Interrupter Target' field of the transfer TRBs it queues on the endpoint's transfer ring. that's how you make sure the transfer completion events get written by xHC to the correct interrupter event ring. no stray events, no chaos, just vibes 😌✨

returns the interrupter id on success, and a negative error otherwise. lowkey simple, highkey important 💜

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/usb/host/xhci-sideband.c — go read the source bestie, it's right there 👀
• xhci_sideband_notify_ep_ring_free(9)
• xhci_sideband_add_endpoint(9)
• xhci_sideband_remove_endpoint(9)
• xhci_sideband_get_endpoint_buffer(9)
• xhci_sideband_get_event_buffer(9)
• xhci_sideband_check(9)
• xhci_sideband_create_interrupter(9)
• xhci_sideband_remove_interrupter(9)
• xhci_sideband_register(9)
• xhci_sideband_unregister(9)

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fr fr read the whole family of these, they're a set 🧚

okay that's the page!! sourced from ./drivers/usb/host, dated October 2026 — mwah, go slay your USB stack 💋🌈⭐