drm/vmwgfx: Fix setting of dma masks

commit 4cbfa1e6c09e98450aab3240e5119b0ab2c9795b upstream.

Previously we set only the dma mask and not the coherent mask. Fix that.
Also, for clarity, make sure both are initially set to 64 bits.

Cc: <stable@vger.kernel.org>
Fixes: 0d00c488f3de: ("drm/vmwgfx: Fix the driver for large dma addresses")
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index bb6dbbe188358f040c1a1e17425874b9b581e367..c72b942f2bdffe9f5e48004f0bf9810aba5bb041 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -627,13 +627,16 @@ out_fixup:
 static int vmw_dma_masks(struct vmw_private *dev_priv)
 {
        struct drm_device *dev = dev_priv->dev;
+       int ret = 0;
 
-       if (intel_iommu_enabled &&
+       ret = dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(64));
+       if (dev_priv->map_mode != vmw_dma_phys &&
            (sizeof(unsigned long) == 4 || vmw_restrict_dma_mask)) {
                DRM_INFO("Restricting DMA addresses to 44 bits.\n");
-               return dma_set_mask(dev->dev, DMA_BIT_MASK(44));
+               return dma_set_mask_and_coherent(dev->dev, DMA_BIT_MASK(44));
        }
-       return 0;
+
+       return ret;
 }
 #else
 static int vmw_dma_masks(struct vmw_private *dev_priv)