lpfc_unreg_did(9)

💅 lpfc_unreg_did — a Kernel API Manual moment

okay bestie, so this is a page straight out of the Kernel API Manual, and honestly? it's giving "small function, big job." let's get into it ✨

---

🌸 NAME 🌸

lpfc_unreg_did — prepare a mailbox command for unregistering DID 🎀

---

🦋 SYNOPSIS 🦋

void lpfc_unreg_did (struct lpfc_hba * phba , uint16_t vpi , uint32_t
did , LPFC_MBOXQ_t * pmb );

like… yes, that's a void. it doesn't return anything. it just does the thing and dips. 💅 periodt.

---

✨ ARGUMENTS ✨

• phba — pointer to lpfc hba data structure. it's the main character, obviously 🫶
• vpi — virtual N_Port identifier 🦋
• did — remote port identifier 👑
• pmb — pointer to the driver internal queue element for mailbox command 📬

---

🔥 DESCRIPTION 🔥

so the unregister DID mailbox command is used to unregister an N_Port/F_Port login for an unknown RPI by specifying the DID of a remote port. no cap, that's what it does.

lowkey the important bit: this command frees an RPI context in the HBA port. and that has the effect of performing an implicit N_Port/F_Port logout. so like… it's not just cleanup, it's a whole logout wearing a disguise 😭

and what this routine itself does? it prepares the mailbox command for unregistering a remote N_Port/F_Port (DID) login. prep girlie. it sets it up, it doesn't send it. 💖

no return value, no error codes on this one — it's a void, so there's literally nothing to check. the pmb you handed it carries the story from here 🫶

---

🌈 SEE ALSO 🌈

this list is long and honestly kind of iconic — look at it go:

Kernel file ./drivers/scsi/lpfc/lpfc_mbox.c

• lpfc_mbox_rsrc_prep(9)
• lpfc_mbox_rsrc_cleanup(9)
• lpfc_dump_static_vport(9)
• lpfc_down_link(9)
• lpfc_dump_mem(9)
• lpfc_dump_wakeup_param(9)
• lpfc_read_nv(9)
• lpfc_config_async(9)
• lpfc_heart_beat(9)
• lpfc_read_topology(9)
• lpfc_clear_la(9)
• lpfc_config_link(9)
• lpfc_config_msi(9)
• lpfc_init_link(9)
• lpfc_read_sparam(9)
• lpfc_read_config(9)
• lpfc_read_lnk_stat(9)
• lpfc_reg_rpi(9)
• lpfc_unreg_login(9)
• lpfc_sli4_unreg_all_rpis(9)
• lpfc_reg_vpi(9)
• lpfc_unreg_vpi(9)
• lpfc_config_pcb_setup(9)
• lpfc_read_rev(9)
• lpfc_build_hbq_profile2(9)
• lpfc_build_hbq_profile3(9)
• lpfc_build_hbq_profile5(9)
• lpfc_config_hbq(9)
• lpfc_config_ring(9)
• lpfc_config_port(9)
• lpfc_kill_board(9)
• lpfc_mbox_put(9)
• lpfc_mbox_get(9)
• __lpfc_mbox_cmpl_put(9)
• lpfc_mbox_cmpl_put(9)
• lpfc_mbox_cmd_check(9)
• lpfc_mbox_dev_check(9)
• lpfc_mbox_tmo_val(9)
• lpfc_sli4_mbx_sge_set(9)
• lpfc_sli4_mbx_sge_get(9)
• lpfc_sli4_mbox_cmd_free(9)
• lpfc_sli4_config(9)
• lpfc_sli4_mbox_rsrc_extent(9)
• lpfc_sli_config_mbox_subsys_get(9)
• lpfc_sli_config_mbox_opcode_get(9)
• lpfc_sli4_mbx_read_fcf_rec(9)
• lpfc_request_features(9)
• lpfc_init_vfi(9)
• lpfc_reg_vfi(9)
• lpfc_init_vpi(9)
• lpfc_unreg_vfi(9)
• lpfc_sli4_dump_cfg_rg23(9)
• lpfc_reg_fcfi(9)
• lpfc_reg_fcfi_mrq(9)
• lpfc_unreg_fcfi(9)
• lpfc_resume_rpi(9)

like, that's a whole friend group right there 💀 but slay, they're all relevant.

---

and that's the page bestie 🎀 the whole thing lives over in ./drivers/scsi/lpfc, and it's dated October 2026 — so yeah, future-dated manpage, main character energy fr fr. go unregister that DID, iykyk 💜🦋