usb_check_int_endpoints(9)

💅 usb_check_int_endpoints(9) — the kernel API manual, but make it make sense

okay bestie, so this is a page from the Kernel API Manual, and the star of the show is usb_check_int_endpoints — a whole function whose entire personality is "does this interface's current altsetting actually have the interrupt endpoints you're looking for, with these exact addresses?" iconic honestly ✨

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✨ NAME ✨

usb_check_int_endpoints — checks whether an interface's current altsetting contains a set of interrupt endpoints with the given addresses. that's it, that's the whole job 🎀

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🦋 SYNOPSIS 🦋

bool usb_check_int_endpoints (const struct usb_interface *intf , const
u8 *ep_addrs );

yes it returns a bool, yes it takes const pointers, yes we respect the const in this house 💜

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🌸 ARGUMENTS 🌸

• intf — the interface whose current altsetting should be searched. like, this one, the current one, not some other altsetting lurking in the back 👀
• ep_addrs — a 0-terminated array of the endpoint addresses (number and direction) to look for. so it's number + direction per endpoint, and the whole thing is capped off with a 0 to say "that's everyone, stop looking" 🫶

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🔥 DESCRIPTION 🔥

Search for endpoints with the specified addresses and check their types.

that's literally the whole thing, no cap. you hand it a list of addresses, it goes looking, and it also vibe-checks the type of what it finds. so it's not just "are you there" — it's "are you there AND are you the right kind of endpoint." main character energy fr fr 💅

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👑 RETURN 👑

true if all the endpoints are found and are interrupt, false otherwise.

and yes — all of them. one missing or one wrong type and it's false, sorry babe 😭

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🧚 SEE ALSO 🧚

bestie the friend group is huge, buckle up:

Kernel file ./drivers/usb/core/usb.c plus usb_find_common_endpoints(9), usb_find_common_endpoints_reverse(9), usb_find_endpoint(9), usb_check_bulk_endpoints(9), usb_find_alt_setting(9), usb_ifnum_to_if(9), usb_altnum_to_altsetting(9), usb_find_interface(9), usb_for_each_dev(9), usb_release_dev(9), usb_alloc_dev(9), usb_get_dev(9), usb_put_dev(9), usb_get_intf(9), usb_put_intf(9), usb_intf_get_dma_device(9), usb_lock_device_for_reset(9), usb_get_current_frame_number(9), usb_alloc_coherent(9), usb_free_coherent(9), usb_alloc_noncoherent(9), usb_free_noncoherent(9), usb_endpoint_max_periodic_payload(9), usb_endpoint_is_hs_isoc_double(9)

like I said. a whole squad 🌈

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reminder bestie: keep every one of those names exactly as written — the kernel does not accept vibes in place of correct identifiers 💀

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anyway that's the page!! brought to you by ./drivers/usb/core, dated October 2026, and living under the very official title usb_check_int_endpoints(9). mwah, go check those interrupt endpoints, love u 🫶💖