mpi3mr_issu..._buf_release(9)

💅 mpi3mr_issue_diag_buf_release(9) — like, the Kernel API Manual one, bestie

okay so first things first: this page lives in the Kernel API Manual, section 9, and the function we're obsessing over is mpi3mr_issue_diag_buf_release. buckle up 🎀

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✨ NAME ✨

mpi3mr_issue_diag_buf_release — literally sends a diag buffer release req. that's the whole gig. no cap 💖

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🌸 SYNOPSIS 🌸

int mpi3mr_issue_diag_buf_release (struct mpi3mr_ioc *mrioc , struct
       diag_buffer_desc *diag_buffer );

like, it returns an int, it takes two pointers, it's giving very much "small function, big responsibilities" ✨

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🦋 ARGUMENTS 🦋

• mrioc — the adapter instance reference, aka your little handle to the controller. this is the main character of the story 🫶
• diag_buffer — the diagnostic buffer descriptor. the buffer's whole vibe, documented 📋

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💜 DESCRIPTION 💜

so what does it actually do?? it issues a diagnostic buffer manage MPI request — with the release action request — through the admin queue, and then it waits for that bad boy to complete. or to time out, which, 😭, happens.

lowkey it's just: fire the request, sit there, wait for the reply. the way that it's both async and sync at the same time? iconic 🔥

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🌈 RETURN 🌈

• 0 on success — slay 💅
• non-zero on failures — rude, but okay 🙈

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👑 SEE ALSO 👑

okay this list is LONG but every single one of these is a friend of the function, so we're naming all of them. no skipping, we don't do that here 💀

the kernel file it lives in: ./drivers/scsi/mpi3mr/mpi3mr_app.c

• mpi3mr_alloc_trace_buffer(9)
• mpi3mr_alloc_diag_bufs(9)
• mpi3mr_issue_diag_buf_post(9)
• mpi3mr_post_diag_bufs(9)
• mpi3mr_process_trigger(9)
• mpi3mr_global_trigger(9)
• mpi3mr_scsisense_trigger(9)
• mpi3mr_event_trigger(9)
• mpi3mr_reply_trigger(9)
• mpi3mr_get_num_trigger(9)
• mpi3mr_refresh_trigger(9)
• mpi3mr_release_diag_bufs(9)
• mpi3mr_set_trigger_data_in_hdb(9)
• mpi3mr_set_trigger_data_in_all_hdb(9)
• mpi3mr_hdbstatuschg_evt_th(9)
• mpi3mr_diag_buffer_for_type(9)
• mpi3mr_bsg_pel_abort(9)
• mpi3mr_bsg_verify_adapter(9)
• mpi3mr_bsg_refresh_hdb_triggers(9)
• mpi3mr_bsg_upload_hdb(9)
• mpi3mr_bsg_repost_hdb(9)
• mpi3mr_bsg_query_hdb(9)
• mpi3mr_enable_logdata(9)
• mpi3mr_get_logdata(9)
• mpi3mr_bsg_pel_enable(9)
• mpi3mr_get_all_tgt_info(9)
• mpi3mr_get_change_count(9)
• mpi3mr_bsg_adp_reset(9)
• mpi3mr_bsg_populate_adpinfo(9)
• mpi3mr_bsg_process_drv_cmds(9)
• mpi3mr_total_num_ioctl_sges(9)
• mpi3mr_bsg_build_sgl(9)
• mpi3mr_get_nvme_data_fmt(9)
• mpi3mr_build_nvme_sgl(9)
• mpi3mr_build_nvme_prp(9)
• mpi3mr_map_data_buffer_dma(9)
• mpi3mr_bsg_process_mpt_cmds(9)
• mpi3mr_app_save_logdata_th(9)
• mpi3mr_bsg_request(9)
• mpi3mr_bsg_exit(9)
• mpi3mr_bsg_node_release(9)
• mpi3mr_bsg_init(9)
• version_fw_show(9)
• fw_queue_depth_show(9)
• op_req_q_count_show(9)
• reply_queue_count_show(9)
• reply_qfull_count_show(9)
• logging_level_show(9)
• logging_level_store(9)
• adp_state_show(9)
• fwfault_count_show(9)
• sas_address_show(9)
• device_handle_show(9)
• persistent_id_show(9)
• sas_ncq_prio_supported_show(9)
• sas_ncq_prio_enable_show(9)

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bestie, that's fifty-something cross-references. hydrate. stretch. touch grass. then come back and read the diag buffer code 🍓

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and that's the whole page!! sourced straight from ./drivers/scsi/mpi3mr, dated October 2026, living its best life in section 9 of the Kernel API Manual — mwah, go read some kernel source, ily 🧚💖