ishtp_send_resume(9)

💅 ishtp_send_resume — a kernel API manual moment

okay so this is ishtp_send_resume, straight out of the Kernel API Manual (section 9, the kernel party zone ✨), and honestly? it's a tiny little function with one job and it does it. let's get into it, bestie 🫶

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✨ NAME ✨

ishtp_send_resume — literally just Send resume message to FW 🦋

🌸 SYNOPSIS 🌸

void ishtp_send_resume (struct ishtp_device *dev );

that's it. that's the whole signature. no return value, no drama, no notes 💅

🎀 ARGUMENTS 🎀

• dev — the ISHTP device instance. your main character struct, the one and only 🌟

💖 DESCRIPTION 💖

so what does it actually do? it sends a resume message to FW — that's the firmware, iykyk 😌

and why do we care? because this is useful for system freeze (non S3) case — so like, if you're doing a freeze thing and it's not S3, this is your girl. lowkey iconic that one function handles one very specific situation and doesn't try to do anything else. periodt 🔥

ngl, "non S3" is doing a lot of heavy lifting in that sentence, so if you're poking at freeze/resume paths, keep that distinction in your head, bestie. it literally says non S3. 🙈

🔍 SEE ALSO 🔍

the source file lives right here 👑:

Kernel file ./drivers/hid/intel-ish-hid/ishtp/hbm.c

and the whole friend group (yes, the entire squad, every single one, no skips) 💜:

• 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)
• recv_fixed_cl_msg(9)
• fix_cl_hdr(9)
• ishtp_send_suspend(9)
• ishtp_query_subscribers(9)

like, this function is one leaf on a whole tree of hbm functions — go read the neighbors if you want the full lore 🌈

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and that's the whole page, bestie, we ate and left zero crumbs 🍓

cute sign-off time 💌 — this page comes to you from ./drivers/hid/intel-ish-hid/ishtp and is dated October 2026. stay slaying out there, and remember: ishtp_send_resume is right there waiting for you whenever the firmware needs a little wake-up call ✨💜