[PATCH V1] PCI: Avoid FLR for AMD NPU device
From: Lizhi Hou
Date: Thu Feb 26 2026 - 13:43:13 EST
The AMD NPU device (PCI device IDs 0x1502 and 0x17f0) advertises FLR
support. However, triggering an FLR causes the device to hang.
Signed-off-by: Lizhi Hou <lizhi.hou@xxxxxxx>
---
drivers/pci/quirks.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 48946cca4be7..757a296eae41 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5603,6 +5603,7 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x443, quirk_intel_qat_vf_cap);
* AMD Starship/Matisse HD Audio Controller 0x1487
* AMD Starship USB 3.0 Host Controller 0x148c
* AMD Matisse USB 3.0 Host Controller 0x149c
+ * AMD Neural Processing Unit 0x1502 0x17f0
* Intel 82579LM Gigabit Ethernet Controller 0x1502
* Intel 82579V Gigabit Ethernet Controller 0x1503
* Mediatek MT7922 802.11ax PCI Express Wireless Network Adapter
@@ -5615,6 +5616,8 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1487, quirk_no_flr);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x148c, quirk_no_flr);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x149c, quirk_no_flr);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x7901, quirk_no_flr);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x1502, quirk_no_flr);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AMD, 0x17f0, quirk_no_flr);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1502, quirk_no_flr);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x1503, quirk_no_flr);
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_MEDIATEK, 0x0616, quirk_no_flr);
--
2.34.1