[PATCH v5 06/16] PCI/AER: Change AER driver to read UCE fatal status for all CXL PCIe Port devices

Terry Bowman
2025-01-07T14:40:08Z

The AER service driver's aer_get_device_error_info() function doesn't read
uncorrectable (UCE) fatal error status from PCIe Upstream Port devices,
including CXL Upstream Switch Ports. As a result, fatal errors are not
logged or handled as needed for CXL PCIe Upstream Switch Port devices.

Update the aer_get_device_error_info() function to read the UCE fatal
status for all CXL PCIe devices. Make the change such that non-CXL devices
are not affected.

The fatal error status will be used in future patches implementing
CXL PCIe Port uncorrectable error handling and logging.

Signed-off-by: Terry Bowman <terry.bowman@amd.com>
---
drivers/pci/pcie/aer.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index 62be599e3bee..79c828bdcb6d 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -1253,7 +1253,8 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
} else if (type == PCI_EXP_TYPE_ROOT_PORT ||
type == PCI_EXP_TYPE_RC_EC ||
type == PCI_EXP_TYPE_DOWNSTREAM ||
- info->severity == AER_NONFATAL) {
+ info->severity == AER_NONFATAL ||
+ (pcie_is_cxl(dev) && type == PCI_EXP_TYPE_UPSTREAM)) {

/* Link is still healthy for IO reads */
pci_read_config_dword(dev, aer + PCI_ERR_UNCOR_STATUS,
--
2.34.1