[PATCH] nouveau/radeon: Set coherent DMA mask

[Konrad Rzeszutek Wilk]

All the storage devices that use the dmapool set the coherent DMA
mask so they can properly use the dmapool. Since the TTM DMA pool
code is based on that and dma_alloc_coherent checks the
'coherent_dma_mask' and not 'dma_mask' we want to set it.

Reviewed-by: Jerome Glisse <jglisse at redhat.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
---
 drivers/gpu/drm/nouveau/nouveau_mem.c  |    5 +++++
 drivers/gpu/drm/radeon/radeon_device.c |    1 +
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 36bec48..6740cf6 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -408,6 +408,11 @@ nouveau_mem_vram_init(struct drm_device *dev)
 	if (ret)
 		return ret;
 
+	ret = pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(dma_bits));
+	if (ret) {
+		/* Reset to default value. */
+		pci_set_consistent_dma_mask(dev->pdev, DMA_BIT_MASK(32));
+	}
 	ret = nouveau_ttm_global_init(dev_priv);
 	if (ret)
 		return ret;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 11f6481..7c31321 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -765,6 +765,7 @@ int radeon_device_init(struct radeon_device *rdev,
 	r = pci_set_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
 	if (r) {
 		rdev->need_dma32 = true;
+		dma_bits = 32;
 		printk(KERN_WARNING "radeon: No suitable DMA available.\n");
 	}
 	r = pci_set_consistent_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
-- 
1.7.7.1