STRUCT MPT3_DIAG_UNREGISTER(9)

💅 struct mpt3_diag_unregister(9) 💅

okay bestie, welcome to the Kernel API Manual — this one's a struct page, and honestly? it's a whole mood. it's short, it's sweet, and it's the "ok we're DONE here" of the diagnostic-message lifecycle. 🎀

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✨ NAME ✨

struct mpt3_diag_unregister — application unregister with driver 💫

and yeah, the manpage spells out what the fields mean right in the NAME line, so let's give them their moment:

• @hdr — the generic header 🫶
• @unique_id — the tag that uniquely identifies the buffer to be unregistered 🔍

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🌸 SYNOPSIS 🌸

struct mpt3_diag_unregister {
    struct mpt3_ioctl_header hdr;
    uint32_t unique_id;
 };

literally just two members, no cap. hdr is a struct mpt3_ioctl_header sitting up top (the generic header, as established), and unique_id is a uint32_t doing the tagging. that's it. that's the struct. 💅

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🦋 Members 🦋

(this section is empty in the original, bestie — no member-by-member commentary to relay here, so we're not gonna make any up. lowkey iconic of it to say nothing. 🫥)

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💖 Description 💖

so what does this actually do? it's the cleanup song. 🎵

this will allow the driver to cleanup any memory allocated for diag messages and to free up any resources. that's the whole job — you unregister, the driver tidies up after itself and gives the memory back. no leaks, no leftovers, main character energy only. 👑

ngl, "free up any resources" is doing a LOT of heavy lifting in that sentence, but we're relaying, not inventing — that's exactly what the page says. 🙈

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⭐ SEE ALSO ⭐

the whole mpt3sas struct family reunion, plus the kernel file it all lives in:

• Kernel file ./drivers/scsi/mpt3sas/mpt3sas_ctl.h 📁
• struct mpt3_ioctl_header(9)
• struct mpt3_ioctl_diag_reset(9)
• struct mpt3_ioctl_pci_info(9)
• struct mpt3_ioctl_iocinfo(9)
• struct mpt3_ioctl_eventquery(9)
• struct mpt3_ioctl_eventenable(9)
• struct MPT3_IOCTL_EVENTS(9)
• struct mpt3_ioctl_eventreport(9)
• struct mpt3_ioctl_command(9)
• struct mpt3_ioctl_btdh_mapping(9)
• struct mpt3_diag_register(9)
• struct mpt3_diag_query(9)
• struct mpt3_diag_release(9)
• struct mpt3_diag_read_buffer(9)
• struct mpt3_addnl_diag_query(9)
• struct mpt3_enable_diag_sbr_reload(9)
• struct mpt3_passthru_command(9)

like, talk about a group chat. every single one of these is invited to the read. iykyk. 🧚

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and that's the whole page, bestie!! 🎀 slay 🎀

this little gem lives in ./drivers/scsi/mpt3sas, it's dated October 2026, and it's filed under struct mpt3_diag_unregister(9) — go forth and unregister responsibly. 💜🦋✨