Just try to set a 64-bit DMA mask first and retry with the smaller dma_mask
if dma_set_mask failed.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/gpu/drm/nouveau/nouveau_ttm.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
index 3f0fb55..bb030e6 100644
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
@@ -350,11 +350,14 @@ nouveau_ttm_init(struct nouveau_drm *drm)
bits = nvxx_mmu(&drm->device)->dma_bits;
if (nvxx_device(&drm->device)->func->pci) {
- if (drm->agp.bridge ||
- !pci_dma_supported(dev->pdev, DMA_BIT_MASK(bits)))
+ if (drm->agp.bridge)
bits = 32;
ret = pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(bits));
+ if (ret && bits != 32) {
+ bits = 32;
+ ret = pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(bits));
+ }
if (ret)
return ret;
--
1.9.1
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