pci_vpd_alloc(9)

💅 pci_vpd_alloc — from the Kernel API Manual, bestie ✨

Okay so picture this: it's giving kernel-internals energy, we're deep in the pci headers, and the function we're stanning today is pci_vpd_alloc. Yes, the "alloc" is right there in the name, no cap. 🎀

✨ NAME ✨

pci_vpd_alloc — it allocates a buffer and reads the VPD into it. That's the whole vibe, honestly. 🦋

🌸 SYNOPSIS 🌸

void * pci_vpd_alloc (struct pci_dev *dev , unsigned int *size );

💖 ARGUMENTS 💖

• dev — the PCI device. Your main character of the hour, lowkey. 👑
• size — a pointer to the field where the VPD length gets returned. She reports back, periodt. 🫶

🔥 DESCRIPTION 🔥

It returns a pointer to the allocated buffer — or, and hear me out, an ERR_PTR in case of failure 😭. That's it, that's the whole function. Iconic brevity, honestly. ⭐

Heads up bestie: check that pointer before you dereference it, because an ERR_PTR is not a real buffer and this is exactly the kind of thing that ruins your whole afternoon 💀

🦋 SEE ALSO 🦋

Kernel file ./include/linux/pci.h, plus this absolutely stacked friend group, fr fr — enum pci_interrupt_pin(9), pci_channel_state_t(9), pci_is_bridge(9), pci_is_vga(9), pci_is_display(9), struct pci_driver(9), PCI_DEVICE(9), PCI_DEVICE_DRIVER_OVERRIDE(9), PCI_DRIVER_OVERRIDE_DEVICE_VFIO(9), PCI_DEVICE_SUB(9), PCI_DEVICE_CLASS(9), PCI_VDEVICE(9), PCI_VDEVICE_SUB(9), PCI_DEVICE_DATA(9), pcie_capability_clear_and_set_word(9), pci_bus_for_each_resource(9), module_pci_driver(9), builtin_pci_driver(9), pci_irq_type(9), pci_irqd_intx_xlate(9), pci_resource_is_io(9), pci_resource_is_mem(9), pci_pcie_cap(9), pci_is_pcie(9), pcie_caps_reg(9), pci_pcie_type(9), pcie_find_root_port(9), pci_vpd_find_id_string(9), pci_vpd_find_ro_info_keyword(9), pci_vpd_check_csum(9), pci_ari_enabled(9), pci_is_thunderbolt_attached(9).

Like, that's a whole contact list. Slay. 💅

And that's the page, bestie 🧚 — sourced straight out of ./include/linux, dated October 2026, and yeah, it's still called pci_vpd_alloc(9) if you need to cite her. Byeee 🌈💜