pci_host_common_parse_perst(9)

💅 pci_host_common_parse_perst (kernel API manual, section 9) 🎀

okay so bestie, welcome to the pci_host_common_parse_perst page — yes section 9, we're in kernel-API territory, this is the deep lore ✨

✨ NAME ✨

pci_host_common_parse_perst — literally parses PERST# from, like, all the nodes, depth first 🦋

🌸 SYNOPSIS 🌸

int pci_host_common_parse_perst (struct device *dev , struct
       pci_host_port *port , struct device_node *np );

🎀 ARGUMENTS 🎀

• dev — the device pointer, your main character struct 💜
• port — the PCI host port, she's the one holding it down 🫶
• np — the device tree node where we start the parsing, like the front door of the whole situation 🚪

🔥 DESCRIPTION 🔥

So the way this works: it recursively parses the PERST# GPIO out of every single PCIe bridge node, starting from np, and it does it in a depth-first manner. Recursive. Depth first. Iconic behaviour, no cap 💅🌳

⭐ RETURN ⭐

Returns 0 on success, or a negative error code on failure. That's it, that's the vibe check 😭

ngl bestie, always check the return value. A negative number is not a personality, it's a problem 🚩

🌈 SEE ALSO 🌈

• Kernel file ./drivers/pci/controller/pci-host-common.c 👑
• pci_host_common_delete_ports(9)
• pci_host_common_parse_port(9)
• pci_host_common_parse_ports(9)
• pci_host_common_d3cold_possible(9)

okay that's the whole page, you ate that 🍓💖 — this came out of ./drivers/pci/controller, dated October 2026, and it's signed pci_host_common_parse_perst(9), periodt ✨🧚‍♀️