iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/vmwgfx: Fix setting of dma masks

Browse Source 
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>
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
View File

@ -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)