scmi_valid_pending_handler(9)

💖 scmi_valid_pending_handler(9) 💖

okay so welcome to the Kernel API Manual, bestie — this page is all about scmi_valid_pending_handler(9), and it's lowkey a lil' detective for pending handlers. let's get into it ✨

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💖 NAME 💖

scmi_valid_pending_handler — helper to check pending status of handlers. that's the whole gig, no cap. 🎀

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🌸 SYNOPSIS 🌸

int scmi_valid_pending_handler (struct scmi_notify_instance *ni , struct
       scmi_event_handler *hndl );

exact signature, copy it like it's your fave lip gloss 💅

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🎀 ARGUMENTS 🎀

• ni — a reference to the notification instance to use.
• hndl — the event handler to check. 🕵️‍♀️

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🦋 DESCRIPTION 🦋

okay so here's the tea, bestie: a handler is considered pending when its r_evt == NULL. why? because the related event was still unknown at handler's registration time. that's the vibe. 😭

but plot twist: since all protocols register their supported events once for all at protocols' initialization time, a pending handler cannot be considered valid anymore if the underlying event it is waiting for belongs to an already initialized and registered protocol. so yeah, it's giving "waiting on something that already showed up" energy. no cap. 💀

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⭐ RETURN ⭐

• 0 on Success — that's it, that's the return. periodt. ✅

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🌈 SEE ALSO 🌈

the whole friend group, assembled:

• Kernel file ./drivers/firmware/arm_scmi/notify.c — source lore
• 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_header(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_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)

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💌 cute sign-off: source/version line is ./drivers/firmware/arm_scmi, date is October 2026, and the page is scmi_valid_pending_handler(9). byeee bestie, go be iconic with those handlers 🫶💅