ep_is_full(9)

✨ ep_is_full(9) — Kernel API Manual ✨

okay bestie, welcome to the Kernel API Manual page for ep_is_full(9) — it’s giving “tiny endpoint vibe check” and honestly it’s iconic 💅

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🎀 NAME 🎀

ep_is_full — checks if ep has place to write bytes 🌸

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🌼 SYNOPSIS 🌼

int ep_is_full (struct pxa_ep *ep );

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💖 ARGUMENTS 💖

• ep — udc endpoint 🫶

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🦋 DESCRIPTION 🦋

So here’s the tea, bestie: if ep is not the control endpoint and it is an IN endpoint, this checks if there’s place to write bytes into the endpoint ✨

It returns 0 if ep is not full, 1 if ep is full, and -EOPNOTSUPP if it’s an OUT endpoint 😭

lowkey important: those return values are the whole point — 0 not full, 1 full, -EOPNOTSUPP for OUT endpoint. no cap. 💀

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🔥 SEE ALSO 🔥

Kernel file ./drivers/usb/gadget/udc/pxa27x_udc.c and the whole function friend group:

• is_match_usb_pxa(9)
• find_pxa_ep(9)
• update_pxa_ep_matches(9)
• pio_irq_enable(9)
• pio_irq_disable(9)
• udc_set_mask_UDCCR(9)
• udc_clear_mask_UDCCR(9)
• ep_write_UDCCSR(9)
• ep_count_bytes_remain(9)
• ep_is_empty(9)
• epout_has_pkt(9)
• set_ep0state(9)
• ep0_idle(9)
• inc_ep_stats_reqs(9)
• inc_ep_stats_bytes(9)
• pxa_ep_setup(9)
• pxa_eps_setup(9)
• pxa_ep_alloc_request(9)
• pxa_ep_free_request(9)
• ep_add_request(9)
• ep_del_request(9)
• req_done(9)
• ep_end_out_req(9)
• ep0_end_out_req(9)
• ep_end_in_req(9)
• ep0_end_in_req(9)
• nuke(9)
• read_packet(9)
• write_packet(9)
• read_fifo(9)
• write_fifo(9)
• read_ep0_fifo(9)
• write_ep0_fifo(9)
• pxa_ep_queue(9)
• pxa_ep_dequeue(9)
• pxa_ep_set_halt(9)
• pxa_ep_fifo_status(9)
• pxa_ep_fifo_flush(9)
• pxa_ep_enable(9)
• pxa_ep_disable(9)
• dplus_pullup(9)
• pxa_udc_get_frame(9)
• pxa_udc_wakeup(9)
• should_enable_udc(9)
• should_disable_udc(9)
• pxa_udc_pullup(9)
• pxa_udc_vbus_session(9)
• pxa_udc_vbus_draw(9)
• pxa_udc_phy_event(9)
• udc_disable(9)
• udc_init_data(9)
• udc_enable(9)
• pxa27x_udc_start(9)
• stop_activity(9)
• pxa27x_udc_stop(9)
• handle_ep0_ctrl_req(9)
• handle_ep0(9)
• handle_ep(9)
• pxa27x_change_configuration(9)
• pxa27x_change_interface(9)
• irq_udc_suspend(9)
• irq_udc_resume(9)
• irq_udc_reconfig(9)
• irq_udc_reset(9)
• pxa_udc_irq(9)
• pxa_udc_probe(9)
• pxa_udc_remove(9)
• pxa_udc_suspend(9)
• pxa_udc_resume(9)

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xoxo bestie, this page is from ./drivers/usb/gadget/udc, dated October 2026, and it’s all about ep_is_full(9) — slay, go check your endpoint 💖✨