legacy_check_special_cases(9)

💖 legacy_check_special_cases(9) — NAME 💖

okay so welcome to the Kernel API Manual, bestie — this page is legacy_check_special_cases(9), and it's literally the ATA special cases moment. 💅

✨ SYNOPSIS ✨

the whole signature, character for character, no edits:

void legacy_check_special_cases (struct pci_dev *p , int *primary , int *secondary );

🎀 ARGUMENTS 🎀

• p — the PCI device to check, bestie. 🫶
• primary — set this if we find an ATA master. 👑
• secondary — set this if we find an ATA secondary. 🦋

🦋 DESCRIPTION 🦋

okay so picture this: a small number of vendors implemented early PCI ATA interfaces on bridge logic, and the ATA interface was not PCI visible at all. iconic chaos, honestly. 😭

where we have a matching PCI driver, we must skip the relevant device here — no cap. if we don't know about it, then the legacy driver is the right driver anyway. periodt. 💅

💜 SEE ALSO 💜

the lore lives in the kernel file ./drivers/ata/pata_legacy.c, and the squad is: legacy_probe_add(9), legacy_set_mode(9), probe_chip_type(9), legacy_init_one(9), legacy_init(9). go off, bestie. 🌈

that's the whole vibe from ./drivers/ata, dated October 2026, page legacy_check_special_cases(9) — mwah 💋