hw_ep_set_halt(9)

💅 hw_ep_set_halt(9) — a Kernel API Manual moment 🎀

okay bestie, so this is a page from the Kernel API Manual (like, the 9 section, kernel devs only, iykyk) and honestly it's giving "short but vital" energy. Let's get into it ✨

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🌸 NAME 🌸

hw_ep_set_halt — configures ep halt & resets data toggle after clear (execute without interruption)

no fr, that parenthetical is doing heavy lifting: you gotta run this one without interruption, periodt. don't be out here getting preempted mid-toggle 🙈

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🦋 SYNOPSIS 🦋

int hw_ep_set_halt (struct ci_hdrc *ci , int num , int dir , int value
);

yup that's the whole signature, returns an int, four args, slay 💅

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✨ ARGUMENTS ✨

• ci — the controller 🎛️ like, the whole chipidea controller struct, the main character
• num — endpoint number 🔢 which ep we're talking about
• dir — endpoint direction 🧭 yeah, direction matters bestie
• value — true => stall, false => unstall 🛑✨ so true halts it, false un-halts it, no cap

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💖 DESCRIPTION 💖

This function returns an error code. that's it. that's the whole description. lowkey iconic how brief it is 🫶

so like — check the return value, bestie, don't just ignore it 😭 it's literally telling you if something went wrong.

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🔥 SEE ALSO 🔥

okay this list is LONG, like, absolutely unhinged length, but every single one is here because we don't skip references in this house 👑

Kernel file ./drivers/usb/chipidea/udc.c:

• hw_ep_bit(9)
• hw_device_state(9)
• hw_ep_flush(9)
• hw_ep_disable(9)
• hw_ep_enable(9)
• hw_ep_get_halt(9)
• hw_ep_prime(9)
• hw_port_is_high_speed(9)
• hw_test_and_clear_complete(9)
• hw_test_and_clear_intr_active(9)
• hw_test_and_clear_setup_guard(9)
• hw_test_and_set_setup_guard(9)
• hw_usb_set_address(9)
• hw_usb_reset(9)
• _usb_addr(9)
• _hardware_enqueue(9)
• free_pending_td(9)
• _hardware_dequeue(9)
• _ep_nuke(9)
• _gadget_stop_activity(9)
• isr_reset_handler(9)
• isr_get_status_complete(9)
• _ep_queue(9)
• isr_get_status_response(9)
• isr_setup_status_complete(9)
• isr_setup_status_phase(9)
• isr_tr_complete_low(9)
• isr_setup_packet_handler(9)
• isr_tr_complete_handler(9)
• ci_udc_start(9)
• udc_start(9)
• udc_stop(9)
• ci_hdrc_gadget_init(9)

like, go read all of them, I'll wait 🧚💜

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⚠️ reminder bestie: the NAME section says execute without interruption — that's not a vibe, that's a requirement 💀

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and that's the page!! 🌈 this lil beauty lives in ./drivers/usb/chipidea, dated October 2026, and it's hw_ep_set_halt(9) forever and always 🎀💖 mwah, go forth and halt those endpoints responsibly 🫶✨