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authorNikolai Kostrigin <[email protected]>2019-04-08 13:37:25 +0300
committerBjorn Helgaas <[email protected]>2019-04-11 08:55:18 -0500
commitd28ca864c493637f3c957f4ed9348a94fca6de60 (patch)
tree53e206c39cdbe6e2f0e62bc9c01fbddb63a36c00
parent9e98c678c2d6ae3a17cb2de55d17f69dddaa231b (diff)
PCI: Mark AMD Stoney Radeon R7 GPU ATS as broken
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 <[email protected]> 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/[email protected] Fixes: 9b44b0b09dec ("PCI: Mark AMD Stoney GPU ATS as broken") Signed-off-by: Nikolai Kostrigin <[email protected]> Signed-off-by: Bjorn Helgaas <[email protected]> Acked-by: Joerg Roedel <[email protected]> CC: [email protected]
-rw-r--r--drivers/pci/quirks.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index a59ad09ce911..68bee35fcafa 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -4903,6 +4903,7 @@ 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 */