i3c_master_disec_locked(9)

💖 NAME

okay so bestie, this page is i3c_master_disec_locked(9) from the Kernel API Manual, and it's literally about one thing: send a DISEC CCC command. That's the whole main-character job. ✨

✨ SYNOPSIS

int i3c_master_disec_locked (struct i3c_master_controller *master , u8
addr , u8 evts );

🌸 ARGUMENTS

• master — the master used to send frames on the bus. It's the one actually doing the frame-sending, no cap.
• addr — a valid I3C slave address or I3C_BROADCAST_ADDR. So either one specific bestie or the whole group chat. 💅
• evts — events to disable. Yep, these are the events getting the "not today" treatment. 🫶

🦋 DESCRIPTION

Send a DISEC CCC command to disable some or all events coming from a specific slave, or all devices if addr is I3C_BROADCAST_ADDR.

🚨 lock check, bestie: this function must be called with the bus lock held in write mode. Not "I think I held it", not "someone else probably did" — write mode, periodt.

This one is lowkey specific about the lock because that's the rule. The command targets one slave normally, but if addr is I3C_BROADCAST_ADDR, it's going out to all devices. 🌈

🎀 RETURN

It returns 0 in case of success, or a negative error code otherwise. So 0 = slay ✅, negative = 😭 but at least you know.

🌈 SEE ALSO

Kernel file ./drivers/i3c/master.c, plus the whole friend group:

• i3c_bus_maintenance_lock(9)
• i3c_bus_maintenance_unlock(9)
• i3c_bus_normaluse_lock(9)
• i3c_bus_normaluse_unlock(9)
• i3c_master_queue_hotjoin(9)
• i3c_master_send_ccc_cmd_locked(9)
• i3c_master_get_free_addr(9)
• i3c_master_setaasa_locked(9)
• i3c_master_entdaa_locked(9)
• i3c_master_enec_disec_locked(9)
• i3c_master_enec_locked(9)
• i3c_master_defslvs_locked(9)
• i3c_master_reattach_i3c_dev_locked(9)
• i3c_master_has_wakeup_enabled_devs(9)
• i3c_master_dma_map_single(9)
• i3c_master_dma_unmap_single(9)
• i3c_master_set_info(9)
• i3c_master_bus_init(9)
• __i3c_master_add_i3c_dev_locked(9)
• i3c_master_add_i3c_dev_locked(9)
• i3c_master_do_daa_ext(9)
• i3c_master_do_daa(9)
• i3c_master_queue_ibi(9)
• i3c_generic_ibi_free_pool(9)
• i3c_generic_ibi_alloc_pool(9)
• i3c_generic_ibi_get_free_slot(9)
• i3c_generic_ibi_recycle_slot(9)
• i3c_master_register(9)
• i3c_master_unregister(9)
• i3c_dev_disable_ibi_locked(9)
• i3c_dev_enable_ibi_locked(9)
• i3c_dev_request_ibi_locked(9)
• i3c_dev_free_ibi_locked(9)

signed off from the Kernel API Manual timeline: source/version ./drivers/i3c, dated October 2026, page i3c_master_disec_locked(9) — mwah 💋