STRUCT QMI_TXN(9)

💅 struct qmi_txn — transaction context

okay bestie, welcome to the Kernel API Manual entry for struct qmi_txn ✨ this is literally the transaction context glow-up and we're gonna get into every single field, no skipping, no cap 🫶

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🌸 NAME 🌸

struct qmi_txn — transaction context 💫

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🎀 SYNOPSIS 🎀

struct qmi_txn {
    struct qmi_handle *qmi;
    u16 id;
    struct mutex lock;
    struct completion completion;
    int result;
    const struct qmi_elem_info *ei;
    void *dest;
 };

like, that's the whole shape of it, copy it exactly bestie, don't be editing it 🙈

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✨ Members ✨

so every field has main character energy of its own, here's the rundown:

• qmi — the QMI handle that this transaction is associated with 🔗 like, the txn's home base, yk?
• id — the transaction id 🏷️ (u16, keeping it cute and bounded bestie)
• lock — for synchronization between the handler and the waiter of messages 🔐 it's giving group-chat mutex energy, nobody talks over each other periodt
• completion — a completion object, used as the transaction receives a response 🎀 the moment the response lands, this lil guy lights up
• result — result code for the completed transaction 🌈 how did it go, basically
• ei — description of the QMI encoded response (optional) 📝 she's optional, don't forget
• dest — destination buffer to decode the message into (optional) 📦 also optional, also iconic

ngl bestie, two of those are optional (ei and dest) — the rest are just... there, living their truth 💅

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🦋 SEE ALSO 🦋

kernel file ./include/linux/soc/qcom/qmi.h — and the whole friend group:

• struct qmi_header(9)
• struct qmi_elem_info(9)
• struct qmi_response_type_v01(9)
• struct qmi_service(9)
• struct qmi_ops(9)
• struct qmi_msg_handler(9)
• struct qmi_handle(9)

go read those too, iykyk 👑

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and that's the whole page bestie 💖 this lil writeup lives over at ./include/linux/soc/qcom, dated October 2026, and it's filed under struct qmi_txn(9) — slay, go forth and transact responsibly 🌟🎀