mpt_diag_reset(9)

🌸 mpt_diag_reset(9) — your girl's guide to the Kernel API Manual ✨

Okay bestie, this little icon lives in the Kernel API Manual, and honestly? It's giving "big reset energy." Let's get into it 💅

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🎀 NAME 🎀

mpt_diag_reset — literally just performs a hard reset of the adapter. That's the whole vibe. No cap.

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✨ SYNOPSIS ✨

int mpt_diag_reset (MPT_ADAPTER *ioc , int ignore , int sleepFlag );

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🦋 ARGUMENTS 🦋

• ioc — a pointer to the MPT_ADAPTER structure. That's your adapter bestie, the main character of this whole routine 🫶
• ignore — set it if you want to honor and clear the reset history bit; clear it to ignore that bit. Lowkey a weird name for a flag that does the opposite of what you'd think, but okay, we move 🙈
• sleepFlag — pass CAN_SLEEP if you're calling from a non-interrupt thread; otherwise set it to NO_SLEEP (and then it uses mdelay instead). Choose wisely, queen 👑

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🔥 DESCRIPTION 🔥

So here's the tea 🍓: this routine puts the adapter into diagnostic mode by writing to the WriteSequence register, and then it performs a hard reset of the adapter via the Diagnostic register. That's it, that's the whole ritual.

Upon successful completion, the adapter should be in ready state. Periodt. 👑

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💜 RETURN 💜

The numbers it can hand back to you, and what they mean:

• 1 — hard reset successful, ate and left no crumbs 🎉
• 0 — no reset performed, because the reset history bit was set 😭
• -2 — enabling diagnostic mode failed 💀
• -3 — diagnostic reset failed 🙈

Watch those negatives, bestie — -2 and -3 mean the vibe check did not pass. Don't just assume 1 and move on fr fr.

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🌈 SEE ALSO 🌈

The kernel file is ./drivers/message/fusion/mptbase.c, and it comes with a whole friend group — here's every single one, no skipping, we love a complete list 🧚

mpt_get_cb_idx(9), mpt_is_discovery_complete(9), mpt_remove_dead_ioc_func(9), mpt_fault_reset_work(9), mpt_interrupt(9), mptbase_reply(9), mpt_register(9), mpt_deregister(9), mpt_event_register(9), mpt_event_deregister(9), mpt_reset_register(9), mpt_reset_deregister(9), mpt_device_driver_register(9), mpt_device_driver_deregister(9), mpt_get_msg_frame(9), mpt_put_msg_frame(9), mpt_put_msg_frame_hi_pri(9), mpt_free_msg_frame(9), mpt_add_sge(9), mpt_add_sge_64bit(9), mpt_add_sge_64bit_1078(9), mpt_add_chain(9), mpt_add_chain_64bit(9), mpt_send_handshake_request(9), mpt_host_page_access_control(9), mpt_host_page_alloc(9), mpt_verify_adapter(9), mpt_get_product_name(9), mpt_mapresources(9), mpt_attach(9), mpt_detach(9), mpt_suspend(9), mpt_resume(9), mpt_do_ioc_recovery(9), mpt_detect_bound_ports(9), mpt_adapter_disable(9), mpt_adapter_dispose(9), MptDisplayIocCapabilities(9), MakeIocReady(9), mpt_GetIocState(9), GetIocFacts(9), GetPortFacts(9), SendIocInit(9), SendPortEnable(9), mpt_alloc_fw_memory(9), mpt_free_fw_memory(9), mpt_do_upload(9), mpt_downloadboot(9), KickStart(9), SendIocReset(9), initChainBuffers(9), PrimeIocFifos(9), mpt_handshake_req_reply_wait(9), WaitForDoorbellAck(9), WaitForDoorbellInt(9), WaitForDoorbellReply(9), GetLanConfigPages(9), mptbase_sas_persist_operation(9), GetIoUnitPage2(9), mpt_GetScsiPortSettings(9), mpt_readScsiDevicePageHeaders(9), mpt_inactive_raid_list_free(9), mpt_inactive_raid_volumes(9), mpt_raid_phys_disk_pg0(9), mpt_raid_phys_disk_get_num_paths(9), mpt_raid_phys_disk_pg1(9), mpt_findImVolumes(9), SendEventNotification(9), SendEventAck(9), mpt_config(9), mpt_ioc_reset(9), procmpt_create(9), procmpt_destroy(9), mpt_print_ioc_summary(9), mpt_set_taskmgmt_in_progress_flag(9), mpt_clear_taskmgmt_in_progress_flag(9), mpt_halt_firmware(9), mpt_SoftResetHandler(9), mpt_Soft_Hard_ResetHandler(9), mpt_HardResetHandler(9), ProcessEventNotification(9), mpt_fc_log_info(9), mpt_spi_log_info(9), mpt_sas_log_info(9), mpt_iocstatus_info_config(9), mpt_iocstatus_info(9), fusion_init(9), fusion_exit(9)

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Okay that's the whole page, bestie — go forth and reset that adapter 💖

Signed, sealed, delivered: sourced from ./drivers/message/fusion, dated October 2026. Mwah 🎀✨