hsi_register_port_event(9)

💖 NAME 💖

okay so bestie, this is the hsi_register_port_event(9) page from the Kernel API Manual ✨ and it's literally here to help you register a client to receive port events. Iconic behavior, no cap.

🌸 SYNOPSIS 🌸

int hsi_register_port_event (struct hsi_client *cl , void
       (*handler)(struct hsi_client *, unsigned long) );

🫶 ARGUMENTS 🫶

• cl — the HSI client that wants to receive port events. That's your main character here 💅.
• handler — the event handler callback. Slay.

✨ DESCRIPTION ✨

Clients should register a callback to be able to receive events from the ports. Not optional if you want the tea from those ports, bestie 🦋.

Registration should happen after claiming the port. Like, after. Claim first, then register — iykyk 🎀.

⚠️ Heads up: the handler can be called in interrupt context. So keep that in mind, okay? 😭

Returns -errno on error, or 0 on success. Clean and simple, periodt.

🔥 SEE ALSO 🔥

Peep the Kernel file ./drivers/hsi/hsi_core.c, plus these absolutely valid references:

• hsi_port_unregister_clients(9)
• hsi_unregister_controller(9)
• hsi_register_controller(9)
• hsi_register_client_driver(9)
• hsi_put_controller(9)
• hsi_alloc_controller(9)
• hsi_free_msg(9)
• hsi_alloc_msg(9)
• hsi_async(9)
• hsi_claim_port(9)
• hsi_release_port(9)
• hsi_unregister_port_event(9)
• hsi_event(9)
• hsi_get_channel_id_by_name(9)

xoxo 💋 this page came from source/version ./drivers/hsi and is dated October 2026 — hsi_register_port_event(9), signing off with main character energy 👑✨