ATS is broken on this hardware (at least for Stoney Ridge based laptop) and causes IOMMU stalls and system failure. Disable ATS on these devices to make them usable again with IOMMU enabled Thanks to Joerg Roedel <jroedel@xxxxxxx> for help. https://bugzilla.kernel.org/show_bug.cgi?id=194521 Signed-off-by: Nikolai Kostrigin <nickel@xxxxxxxxxxxx> --- drivers/pci/quirks.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 4700d24e5d55..abb2532e16bf 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4876,6 +4876,7 @@ static void quirk_no_ats(struct pci_dev *pdev) /* AMD Stoney platform GPU */ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x98e4, quirk_no_ats); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6900, quirk_no_ats); #endif /* CONFIG_PCI_ATS */ /* Freescale PCIe doesn't support MSI in RC mode */ -- 2.21.0
