[PATCH] PCI/portdev: Disable AER for Titan Ridge 4C 2018
From: Atharva Tiwari
Date: Tue Jan 06 2026 - 13:20:40 EST
Disable AER for Intel Titan Ridge 4C 2018
(used in T2 iMacs, where the warnings appear)
that generates continuous pcieport warnings. such as:
pcieport 0000:00:1c.4: AER: Correctable error message received from 0000:07:00.0
pcieport 0000:07:00.0: PCIe Bus Error: severity=Correctable, type=Data Link Layer, (Receiver ID)
pcieport 0000:07:00.0: device [8086:15ea] error status/mask=00000080/00002000
pcieport 0000:07:00.0: [ 7] BadDLLP
(see: https://bugzilla.kernel.org/show_bug.cgi?id=220651)
macOS also disables AER for Thunderbolt devices and controllers in their drivers.
Signed-off-by: Atharva Tiwari <atharvatiwarilinuxdev@xxxxxxxxx>
---
drivers/pci/pcie/portdrv.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/pcie/portdrv.c b/drivers/pci/pcie/portdrv.c
index 38a41ccf79b9..5330a679fcff 100644
--- a/drivers/pci/pcie/portdrv.c
+++ b/drivers/pci/pcie/portdrv.c
@@ -240,7 +240,9 @@ static int get_port_device_capability(struct pci_dev *dev)
if ((pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
pci_pcie_type(dev) == PCI_EXP_TYPE_RC_EC) &&
dev->aer_cap && pci_aer_available() &&
- (pcie_ports_native || host->native_aer))
+ (pcie_ports_native || host->native_aer) &&
+ !(dev->vendor == PCI_VENDOR_ID_INTEL &&
+ (dev->device >= 0x15EA && dev->device <= 0x15EC)))
services |= PCIE_PORT_SERVICE_AER;
#endif
--
2.43.0