hw_device_state(9)

🌸 NAME 🌸

okay so bestie, this is hw_device_state(9) from the Kernel API Manual, and it's giving "tiny but important kernel helper" energy. The one-liner is: hw_device_state — enables/disables interrupts (execute without interruption). That "execute without interruption" bit is literally right there in the name section, so don't sleep on it. 💅

✨ SYNOPSIS ✨

int hw_device_state (struct ci_hdrc *ci , u32 dma );

🎀 ARGUMENTS 🎀

• ci — the controller. That's the whole vibe for this one. 🫶
• dma — 0 => disable, !0 => enable and set dma engine. Yep, zero means off, anything not zero means on plus set the dma engine. 💖

🔥 DESCRIPTION 🔥

This function returns an error code. That's it, that's the description — no cap, bestie. It's not out here doing a whole novel; it just returns an error code. 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/usb/chipidea/udc.c and these iconic little cross-refs:

• hw_ep_bit(9)
• hw_ep_flush(9)
• hw_ep_disable(9)
• hw_ep_enable(9)
• hw_ep_get_halt(9)
• hw_ep_prime(9)
• hw_ep_set_halt(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)

and that's the page, bestie 🎀 source/version: ./drivers/usb/chipidea, date: October 2026. mwah 💋