pciehp_check_link_active(9)

💖 pciehp_check_link_active(9) — Kernel API Manual era 💖

okay so this is pciehp_check_link_active(9), straight from the Kernel API Manual, and it is literally here to tell you if the link is active, bestie 🦋

✨ NAME ✨

pciehp_check_link_active — Is the link active

🌸 SYNOPSIS 🌸

int pciehp_check_link_active (struct controller *ctrl );

🎀 ARGUMENTS 🎀

• ctrl — the PCIe hotplug controller, aka the main character of this function 👑

💅 DESCRIPTION 💅

Checks whether the downstream link is currently active. That's the vibe check: link active or link not active 💫

⚠️ Heads up, bestie: it is possible that the card is removed immediately after this check, so the caller may need to take that into account. No cap, that timing window is real 😭

If the hotplug controller itself is not available anymore, it returns -ENODEV. 🫶

👀 SEE ALSO 👀

Kernel file ./drivers/pci/hotplug/pciehp_hpc.c:

• pcie_write_cmd(9)
• pciehp_card_present(9)
• pciehp_card_present_or_link_active(9)
• pciehp_set_indicators(9)
• pciehp_slot_reset(9)

mwah 💋 this little page comes from ./drivers/pci/hotplug, dated October 2026, and it stars pciehp_check_link_active(9) — periodt ✨👑