scmi_process_event_header(9)

okay bestie, welcome to the Kernel API Manual page for scmi_process_event_header(9) — yes, we're doing kernel event headers and it's giving main character energy 💅✨

🌸 NAME 🌸

scmi_process_event_header — Dequeue and process an event header. That's the whole title, periodt 🎀

📜 SYNOPSIS 📜

Here's the exact signature, no cap:

struct scmi_registered_event * scmi_process_event_header (struct
       events_queue *eq , struct scmi_registered_events_desc *pd );

🫶 ARGUMENTS 🫶

• eq — the queue to use, bestie 🫶
• pd — the protocol descriptor to use, fr fr 💖

🦋 DESCRIPTION 🦋

So this function reads an event header from the protocol queue into the dedicated scratch buffer and looks for a matching registered event 💅 if it detects an anomalously sized read, it just flushes the queue. That's the vibe, and it is iconic 🌸

⭐ RETURN ⭐

• a reference to the matching registered event when found 💖
• ERR_PTR(-EINVAL) when NO registered event could be found 😭
• NULL when the queue is empty 🫶

🔥 SEE ALSO 🔥

Kernel file: ./drivers/firmware/arm_scmi/notify.c — go read it, iykyk 👑 Then the whole linked-up crew:

• Theory of operation(9)
• struct scmi_notify_instance(9)
• struct events_queue(9)
• struct scmi_event_header(9)
• struct scmi_registered_events_desc(9)
• struct scmi_registered_event(9)
• struct scmi_event_handler(9)
• scmi_lookup_and_call_event_chain(9)
• scmi_process_event_payload(9)
• scmi_events_dispatcher(9)
• scmi_notify(9)
• scmi_kfifo_free(9)
• scmi_initialize_events_queue(9)
• scmi_allocate_registered_events_desc(9)
• scmi_register_protocol_events(9)
• scmi_deregister_protocol_events(9)
• scmi_allocate_event_handler(9)
• scmi_free_event_handler(9)
• scmi_bind_event_handler(9)
• scmi_valid_pending_handler(9)
• scmi_register_event_handler(9)
• __scmi_event_handler_get_ops(9)
• scmi_get_active_handler(9)
• __scmi_enable_evt(9)
• scmi_put_handler_unlocked(9)
• scmi_event_handler_enable_events(9)
• scmi_notifier_register(9)
• scmi_notifier_unregister(9)
• scmi_devm_notifier_register(9)
• scmi_devm_notifier_unregister(9)
• scmi_protocols_late_init(9)
• scmi_notification_init(9)
• scmi_notification_quiesce(9)
• scmi_notification_exit(9)

mwah 💋 that's the page! source/version line: ./drivers/firmware/arm_scmi · date: October 2026 · page: scmi_process_event_header(9) 🎀✨