usb_reset_endpoint(9)

💅 usb_reset_endpoint — a Kernel API Manual moment

okay so this is usb_reset_endpoint(9) from the Kernel API Manual, and honestly? she's a little function with a big job. let's get into it 🫶

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✨ NAME ✨

usb_reset_endpoint — reset an endpoint's state. that's it. that's the whole vibe check. no cap. 🎀

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🌸 SYNOPSIS 🌸

void usb_reset_endpoint (struct usb_device *dev , unsigned int epaddr );

literally just two args, bestie. she takes them and she returns void — no comeback, no receipts, nothing to check. it's giving "i do my job and i leave" energy 💅

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🦋 ARGUMENTS 🦋

• dev — the device whose endpoint is about to get reset. your main character device, the one that owns the endpoint in question 👑
• epaddr — the endpoint's address. and listen, the encoding matters, so pay attention: endpoint number for output, and endpoint number + USB_DIR_IN for input. that's the whole rule, iykyk 🔥

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💖 DESCRIPTION 💖

so what actually happens? usb_reset_endpoint resets any host-side endpoint state — and the manpage names the examples, so i'll name them too, no gatekeeping here:

• the toggle bit
• the sequence number
• the current window

that's the whole thing. host-side state, reset, done. not me being obsessed with how tidy this function is 😭✨

lowkey reminder: it's host-side state we're talking about. that's the exact wording, don't come for me bestie 🌸

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🧚 SEE ALSO 🧚

the kernel file lives at ./drivers/usb/core/message.c — go say hi to her 🎀

and here's the entire friend group, all of them, in order, no one left out (i would never):

• usb_control_msg(9)
• usb_control_msg_send(9)
• usb_control_msg_recv(9)
• usb_interrupt_msg(9)
• usb_bulk_msg(9)
• usb_bulk_msg_killable(9)
• usb_sg_init(9)
• usb_sg_wait(9)
• usb_sg_cancel(9)
• usb_get_descriptor(9)
• usb_get_string(9)
• usb_string(9)
• usb_cache_string(9)
• usb_get_status(9)
• usb_clear_halt(9)
• usb_disable_endpoint(9)
• usb_disable_interface(9)
• usb_disable_device(9)
• usb_enable_endpoint(9)
• usb_enable_interface(9)
• usb_set_interface(9)
• usb_reset_configuration(9)
• usb_set_wireless_status(9)
• usb_driver_set_configuration(9)
• cdc_parse_cdc_header(9)

slay. that's the whole list. go read all of them, i'll wait 💜

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okay bye bestie, closing credits time — this page comes from ./drivers/usb/core, dated October 2026, and the whole thing is filed under usb_reset_endpoint(9). mwah 🌈⭐💖