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drm/nouveau/device/pci: fix oops if no mmu subdev present 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2016-11-08 09:43:50 +10:00
parent 3ca03cac39
commit 9e38b13ea5
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/nouveau/nvkm/engine/device/pci.c
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@ -1687,7 +1687,7 @@ nvkm_device_pci_new(struct pci_dev *pci_dev, const char *cfg, const char *dbg,
* This is necessary for platforms where the default DMA mask of 32
* does not cover any system memory, i.e., when all RAM is > 4 GB.
*/
if (subdev_mask & BIT(NVKM_SUBDEV_MMU))
if (pdev->device.mmu)
dma_set_mask_and_coherent(&pci_dev->dev,
DMA_BIT_MASK(pdev->device.mmu->dma_bits));