recv_fixed_cl_msg(9)

💖 recv_fixed_cl_msg(9) — like, the Kernel API Manual page, bestie 💖

okay so picture this: it's a page from the Kernel API Manual and it's all about recv_fixed_cl_msg, which is giving "tiny but crucial" energy. let's get into it 🎀

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✨ NAME ✨

recv_fixed_cl_msg — Receive fixed client message 🦋

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🌸 SYNOPSIS 🌸

void recv_fixed_cl_msg (struct ishtp_device *dev , struct ishtp_msg_hdr
*ishtp_hdr );

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💅 ARGUMENTS 💅

• dev — the ISHTP device instance, aka the main character of this whole operation 👑
• ishtp_hdr — the received bus message, freshly arrived and ready for its moment ✨

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🔥 DESCRIPTION 🔥

So what does it actually do? It receives and processes ISHTP fixed client messages — and like, "fixed" here means address == 0, no cap, that's literally the whole vibe check 🫶

And the part you cannot skip: this happens in ISR context 🚨 like, interrupt service routine context, so lowkey keep that in mind, iykyk 💀

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⭐ SEE ALSO ⭐

First up, the kernel file it lives in:

• ./drivers/hid/intel-ish-hid/ishtp/hbm.c

and then, because the whole friend group shows up to every function:

• ishtp_hbm_fw_cl_allocate(9)
• ishtp_hbm_cl_hdr(9)
• ishtp_hbm_cl_addr_equal(9)
• ishtp_hbm_start_wait(9)
• ishtp_hbm_start_req(9)
• ishtp_hbm_enum_clients_req(9)
• ishtp_hbm_prop_req(9)
• ishtp_hbm_stop_req(9)
• ishtp_hbm_cl_flow_control_req(9)
• ishtp_hbm_cl_disconnect_req(9)
• ishtp_hbm_cl_disconnect_res(9)
• ishtp_hbm_cl_connect_req(9)
• ishtp_hbm_cl_connect_res(9)
• ishtp_hbm_fw_disconnect_req(9)
• ishtp_hbm_dma_xfer_ack(9)
• ishtp_hbm_dma_xfer(9)
• ishtp_hbm_dispatch(9)
• bh_hbm_work_fn(9)
• recv_hbm(9)
• ishtp_loader_recv_msg(9)
• fix_cl_hdr(9)
• ishtp_send_suspend(9)
• ishtp_send_resume(9)
• ishtp_query_subscribers(9)

like yes, that is a lot of functions, but every single one of them ate 💅

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okay that's the whole page!! 🧚 this little cutie lives in ./drivers/hid/intel-ish-hid/ishtp, and the version/date on the tin? October 2026 🗓️💜 slay, periodt. go read the whole manual bestie, ily, bye!! 🌈💖