Hello! I see that more PCI service drivers in their interrupt handlers are accessing PCI config space. E.g. in PCIe Hot Plug interrupt handler pciehp_isr handler is called pcie_capability_read_word() function. It is correct? Because these capability functions are protected by pci_lock_config() / pci_unlock_config() calls. And what would happen when during execution of reading or writing to PCIe config space (e.g. via pcie_capability_read_word()) is triggered PCIe HP interrupt? Would not enter interrupt handler function in deadlock (waiting for unlocking config space)?
