usb_ep_set_maxpacket_limit(9)

💖 NAME 💖

usb_ep_set_maxpacket_limit — set maximum packet size limit for endpoint

okay so bestie, this is the usb_ep_set_maxpacket_limit(9) page from the Kernel API Manual 🌸 and it’s literally here to set the maximum packet size limit for an endpoint. It’s giving very specific UDC-driver energy 💅

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✨ SYNOPSIS ✨

void usb_ep_set_maxpacket_limit (struct usb_ep *ep , unsigned
       maxpacket_limit );

That’s the exact signature, no cap 🫶

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🎀 ARGUMENTS 🎀

• ep — the endpoint being configured 💖
• maxpacket_limit — value of maximum packet size limit ✨

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🦋 DESCRIPTION 🦋

This function should be used only in UDC drivers to initialize endpoint (usually in probe function). That’s the whole tea, bestie: UDC drivers only, and it’s for initializing the endpoint, usually in the probe function. The manual is not being subtle about this one 🙈

lowkey important: “should be used only in UDC drivers” is a real rule, not a vibe suggestion 💀✨

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👑 SEE ALSO 👑

• Kernel file ./drivers/usb/gadget/udc/core.c struct usb_udc(9)
• usb_ep_enable(9)
• usb_ep_disable(9)
• usb_ep_alloc_request(9)
• usb_ep_free_request(9)
• usb_ep_queue(9)
• usb_ep_dequeue(9)
• usb_ep_set_halt(9)
• usb_ep_clear_halt(9)
• usb_ep_set_wedge(9)
• usb_ep_fifo_status(9)
• usb_ep_fifo_flush(9)
• usb_gadget_frame_number(9)
• usb_gadget_wakeup(9)
• usb_gadget_set_remote_wakeup(9)
• usb_gadget_set_selfpowered(9)
• usb_gadget_clear_selfpowered(9)
• usb_gadget_vbus_connect(9)
• usb_gadget_vbus_draw(9)
• usb_gadget_vbus_disconnect(9)
• usb_gadget_connect(9)
• usb_gadget_disconnect(9)
• usb_gadget_deactivate(9)
• usb_gadget_activate(9)
• usb_gadget_giveback_request(9)
• gadget_find_ep_by_name(9)
• usb_gadget_check_config(9)
• usb_udc_vbus_handler(9)
• usb_gadget_udc_reset(9)
• usb_gadget_udc_start_locked(9)
• usb_gadget_udc_stop_locked(9)
• usb_gadget_udc_set_speed(9)
• usb_gadget_enable_async_callbacks(9)
• usb_gadget_disable_async_callbacks(9)
• usb_udc_release(9)
• usb_initialize_gadget(9)
• usb_add_gadget(9)
• usb_add_gadget_udc_release(9)
• usb_get_gadget_udc_name(9)
• usb_add_gadget_udc(9)
• usb_del_gadget(9)
• usb_del_gadget_udc(9)

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mwah 💋 — source/version: ./drivers/usb/gadget/udc; date: October 2026. stay slaying, bestie 🎀