xhci_sideba...ep_ring_free(9)

✨ NAME ✨

xhci_sideband_notify_ep_ring_free — okay so this is the one that notifies the client of xfer ring free 💅

Welcome to the Kernel API Manual, bestie — yes, the truncated header up there is just xhci_sideba...ep_ring_free(9) doing its little abbreviation thing because the real name is a whole mouthful 🎀

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🌸 SYNOPSIS 🌸

void xhci_sideband_notify_ep_ring_free (struct xhci_sideband *sb ,
unsigned int ep_index );

That's it. That's the whole call. Void return, two args, she's not complicated 💖

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🦋 ARGUMENTS 🦋

• sb — the sideband instance for this usb device 🫶 like, the specific one, for this device, no mix-ups
• ep_index — the usb endpoint index ⭐ literally just which endpoint we're talking about

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👑 DESCRIPTION 👑

So the whole vibe here: this function notifies the xHCI sideband client driver that a xHCI transfer ring free routine is happening 🌀 This is your heads-up moment — it lets the client make sure that all transfers are completed before things move on. No half-finished transfers left floating around, iykyk 😭

💀 real talk though: the callback should be synchronous, because the ring free happens after. So do not go running off async, bestie, the ordering literally depends on you being done first 🫶

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🌈 SEE ALSO 🌈

Kernel file ./drivers/usb/host/xhci-sideband.c — that's the source of truth, go read her 💜

• 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_interrupter_id(9)
• xhci_sideband_register(9)
• xhci_sideband_unregister(9)

The whole sideband friend group, all here, all iconic 👑

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🎀 and that's the page, bestie! this one lives over in ./drivers/usb/host, dated October 2026, and it's filed under xhci_sideba...ep_ring_free(9) — yes, same truncated little nickname as the top, she's consistent ✨💅🦋