From 5098998f3408291b477ec2c1324d282eb2fd6c58 Mon Sep 17 00:00:00 2001 From: Nikolai Kostrigin Date: Thu, 23 May 2019 19:20:35 +0800 Subject: [PATCH] PCI: Mark AMD Stoney Radeon R7 GPU ATS as broken mainline inclusion from mainline-5.1-rc1 commit d28ca864c493 category: bugfix bugzilla: 16047 CVE: NA ------------------------------------------------- ATS is broken on the Radeon R7 GPU (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 for help. [bhelgaas: In the email thread mentioned below, Alex suspects the real problem is in sbios or iommu, so it may affect only certain systems, and it may affect other devices in those systems as well. However, per Joerg we lack the ability to debug further, so this quirk is the best we can do for now.] Link: https://bugzilla.kernel.org/show_bug.cgi?id=194521 Link: https://lore.kernel.org/lkml/20190408103725.30426-1-nickel@altlinux.org Fixes: 9b44b0b09dec ("PCI: Mark AMD Stoney GPU ATS as broken") Signed-off-by: Nikolai Kostrigin Signed-off-by: Bjorn Helgaas Acked-by: Joerg Roedel CC: stable@vger.kernel.org Signed-off-by: Xiongfeng Wang Reviewed-by: Yao Hongbo Signed-off-by: Yang Yingliang --- drivers/pci/quirks.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 4b8d4ccbba7f..43b9d573023a 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4881,6 +4881,7 @@ 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 */ -- GitLab