5e69a33c5c
When a device is already unplugged by pciehp by the time the AER handler is invoked, the PCIe device will already be in the pci_channel_io_perm_failure state. In that case simply return PCI_ERS_RESULT_DISCONNECT instead of trying to do a state transition that will fail. Also untangle the state transition failure from the lack of methods to improve the debugging output in case it happens again. Link: https://lore.kernel.org/r/20220601074024.3481035-1-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>