2 files changed, 3 insertions, 0 deletions

diff --git a/drivers/dma/ioat/hw.h b/drivers/dma/ioat/hw.h
index 3e38877cae6b..781c94de8e81 100644
--- a/drivers/dma/ioat/hw.h
+++ b/drivers/dma/ioat/hw.h
@@ -73,6 +73,7 @@
 #define IOAT_VER_3_0            0x30    /* Version 3.0 */
 #define IOAT_VER_3_2            0x32    /* Version 3.2 */
 #define IOAT_VER_3_3            0x33    /* Version 3.3 */
+#define IOAT_VER_3_4            0x34    /* Version 3.4 */
 
 
 int system_has_dca_enabled(struct pci_dev *pdev);
diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index 3161dfbca505..58dd1bfd3edd 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -1353,6 +1353,8 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         pci_set_drvdata(pdev, device);
 
         device->version = readb(device->reg_base + IOAT_VER_OFFSET);
+        if (device->version >= IOAT_VER_3_4)
+                ioat_dca_enabled = 0;
         if (device->version >= IOAT_VER_3_0) {
                 if (is_skx_ioat(pdev))
                         device->version = IOAT_VER_3_2;