type1_access_ok(9)

💖 type1_access_ok(9) — check whether to use type 1

hey bestie, welcome to type1_access_ok(9) from the Kernel API Manual ✨ this one's a tiny little vibe check for whether type 1 access is okay, and honestly it's giving "small function, important job" energy 💅

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🌸 NAME

type1_access_ok — check whether to use type 1 🎀

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✨ SYNOPSIS

bool type1_access_ok (unsigned int bus , unsigned int devfn , int reg );

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🎀 ARGUMENTS

• bus — the bus number, periodt 🔥
• devfn — the device & function in question, iykyk 🦋
• reg — the configuration register offset, literally right there 💜

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🦋 DESCRIPTION

okay so here's the tea ☕: if the bus is on a Lincroft chip and it exists, or it's not on a Lincroft at all, then we can go ahead with any reads & writes. slay 💅

but if it's on a Lincroft and it does not exist, then avoid the access altogether to keep the chip from hanging 😭 highkey important, ngl.

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💜 SEE ALSO

• Kernel file ./arch/x86/pci/intel_mid.c
• fixed_bar_cap(9)
• intel_mid_pci_init(9)

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signed off from ./arch/x86/pci · October 2026 · type1_access_ok(9) 💅