From 0dcc4a59d5a9821ed6f6cf5e88c96ff4f25e55aa Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 10 Nov 2015 14:45:39 -0800 Subject: [PATCH] nouveau: don't call pci_dma_supported 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 Cc: David Airlie Cc: Ben Skeggs Cc: Alexandre Courbot Cc: Daniel Vetter Cc: Thierry Reding Cc: Dave Airlie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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 3f713c1b5dc1..d2e7d209f651 100644 --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c @@ -353,8 +353,7 @@ 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 || - !dma_supported(dev->dev, DMA_BIT_MASK(bits))) + if (drm->agp.bridge) bits = 32; } else if (device->func->tegra) { struct nvkm_device_tegra *tegra = device->func->tegra(device); @@ -369,6 +368,10 @@ nouveau_ttm_init(struct nouveau_drm *drm) } ret = dma_set_mask(dev->dev, DMA_BIT_MASK(bits)); + if (ret && bits != 32) { + bits = 32; + ret = dma_set_mask(dev->dev, DMA_BIT_MASK(bits)); + } if (ret) return ret; -- 2.20.1