STRUCT FW_CDEV_INITIATE_BUS_RESET(9)

💅 struct fw_cdev_initiate_bus_reset(9) 💅

okay so welcome to the Kernel API Manual, bestie — this one's a lil struct that literally just exists to make a bus reset happen. short page, iconic energy, let's go ✨

---

🌸 NAME 🌸

struct fw_cdev_initiate_bus_reset — Initiate a bus reset 🎀

---

🦋 SYNOPSIS 🦋

struct fw_cdev_initiate_bus_reset {
    __u32 type;
};

that's it. one field. a whole queen with a single member, we love a minimalist 💅

---

🍓 Members 🍓

• type — set this to FW_CDEV_SHORT_RESET or FW_CDEV_LONG_RESET, pick your fighter, no in-between 🙈

---

✨ DESCRIPTION ✨

so the whole vibe here is: you're initiating a bus reset for the bus this device is on. main character move tbh 🔥

and there are two flavors of that reset:

• the original (long) bus reset 💜
• the arbitrated (short) bus reset — the glow-up that got introduced in 1394a-2000 ⭐

ngl the important part: the ioctl returns immediately. like, it does not wait around. it's giving "i sent the text, i'm not waiting for a reply" energy 😭

a subsequent fw_cdev_event_bus_reset is what tells you when the reset actually happened. and here's the real tea — since ABI v4, that event may land considerably later than the ioctl did 👀 because the kernel ensures a grace period between subsequent bus resets, per the IEEE 1394 bus management specification. so don't be out here thinking something's broken when your event takes a minute, the kernel is just being responsible fr fr 🫶

lowkey important: the ioctl is instant, the reset is not. two different timelines, bestie. don't mix them up 💀

---

🧚 SEE ALSO 🧚

• Kernel file ./include/uapi/linux/firewire-cdev.h struct fw_cdev_event_common(9), struct fw_cdev_event_bus_reset(9), struct fw_cdev_event_response(9), struct fw_cdev_event_response2(9), struct fw_cdev_event_request(9), struct fw_cdev_event_request2(9), struct fw_cdev_event_request3(9), struct fw_cdev_event_iso_interrupt(9), struct fw_cdev_event_iso_interrupt_mc(9), struct fw_cdev_event_iso_resource(9), struct fw_cdev_event_phy_packet(9), struct fw_cdev_event_phy_packet2(9), union fw_cdev_event(9), struct fw_cdev_get_info(9), struct fw_cdev_send_request(9), struct fw_cdev_send_response(9), struct fw_cdev_allocate(9), struct fw_cdev_deallocate(9), struct fw_cdev_add_descriptor(9), struct fw_cdev_remove_descriptor(9), struct fw_cdev_create_iso_context(9), struct fw_cdev_set_iso_channels(9), struct fw_cdev_iso_packet(9), struct fw_cdev_queue_iso(9), struct fw_cdev_start_iso(9), struct fw_cdev_stop_iso(9), struct fw_cdev_flush_iso(9), struct fw_cdev_get_cycle_timer(9), struct fw_cdev_get_cycle_timer2(9), struct fw_cdev_allocate_iso_resource(9), struct fw_cdev_send_stream_packet(9), struct fw_cdev_send_phy_packet(9), struct fw_cdev_receive_phy_packets(9)

like yes that's a lot of friends but every single one of them is on the list, we don't skip the roster 👑

---

and that's the page!! 💖 brought to you by ./include/uapi/linux (the source, the origin, the blueprint 🌈), dated October 2026, and stamped right back around to struct fw_cdev_initiate_bus_reset(9) — full circle, periodt 🎀✨