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drm/vmwgfx: Fix setting of dma masks

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commit 4cbfa1e6c0 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: 0d00c488f3: ("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>
This commit is contained in:
Thomas Hellstrom
2019-01-28 10:31:33 +01:00
committed by Greg Kroah-Hartman
parent 90c7dfa377
commit d69e310cbf
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
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@@ -604,13 +604,16 @@ 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)