usb_ep_clear_halt(9)

✨ usb_ep_clear_halt(9) ✨

okay so bestie, welcome to the Kernel API Manual 💖 this one's a little function called usb_ep_clear_halt, and honestly? it's giving "small but mighty". let's get into it 🫶

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🌸 NAME 🌸

usb_ep_clear_halt — clears endpoint halt, and resets toggle 💅

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🎀 SYNOPSIS 🎀

int usb_ep_clear_halt (struct usb_ep *ep );

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🌈 ARGUMENTS 🌈

• ep — the bulk or interrupt endpoint being reset. that's your main character right there 👑

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💜 DESCRIPTION 💜

Use this when you're responding to the standard usb "set interface" request, for endpoints that aren't being reconfigured — and do it after you've cleared any other state sitting in the endpoint's i/o queue. order matters, no cap 🧚

This routine may be called in interrupt context. so yeah, it's chill like that ✨

It returns zero, or a negative error code 😭. On success, this call clears the underlying hardware state reflecting endpoint halt and data toggle.

⚠️ heads up bestie: some hardware literally can't support this request (like pxa2xx_udc), and accordingly can't correctly implement interface altsettings. not a skill issue, just a hardware issue 💀

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/usb/gadget/udc/core.c struct usb_udc(9)
• usb_ep_set_maxpacket_limit(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_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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and that's the whole page, bestie!! 🎉 this little icon lives in the ./drivers/usb/gadget/udc corner of the kernel, all dated October 2026 🍓 go forth and clear those halts, you absolute legend 💅👑💖