PCI/AER: Add RCEC AER error injection support

Root Complex Event Collectors (RCEC) appear as peers to Root Ports and may
also have the AER capability.

Add RCEC support to the AER error injection driver.

Co-developed-by: Sean V Kelley <sean.v.kelley@intel.com>
Link: https://lore.kernel.org/r/20201121001036.8560-16-sean.v.kelley@intel.com
Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # non-native/no RCEC
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

diff --git a/drivers/pci/pcie/aer_inject.c b/drivers/pci/pcie/aer_inject.c
index c2cbf425afc52ca8d28310c8ff58c87c913227b7..767f8859b99bb707bb85ddb3ab78d8c9a4ae8b73 100644 (file)
--- a/drivers/pci/pcie/aer_inject.c
+++ b/drivers/pci/pcie/aer_inject.c
@@ -333,8 +333,11 @@ static int aer_inject(struct aer_error_inj *einj)
        if (!dev)
                return -ENODEV;
        rpdev = pcie_find_root_port(dev);
+       /* If Root Port not found, try to find an RCEC */
+       if (!rpdev)
+               rpdev = dev->rcec;
        if (!rpdev) {
-               pci_err(dev, "Root port not found\n");
+               pci_err(dev, "Neither Root Port nor RCEC found\n");
                ret = -ENODEV;
                goto out_put;
        }