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drm/nvc0/fb: ignore readback page alloc failure to support userspace

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2013-01-16 10:05:31 +10:00
parent c5bd028baa
commit fffeba2a21
1 changed files with 9 additions and 8 deletions
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17
drivers/gpu/drm/nouveau/core/subdev/fb/nvc0.c
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@ -178,7 +178,8 @@ nvc0_fb_init(struct nouveau_object *object)
if (ret)
return ret;
nv_wr32(priv, 0x100c10, priv->r100c10 >> 8);
if (priv->r100c10_page)
nv_wr32(priv, 0x100c10, priv->r100c10 >> 8);
return 0;
}
@ -217,13 +218,13 @@ nvc0_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
priv->base.ram.put = nv50_fb_vram_del;
priv->r100c10_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
if (!priv->r100c10_page)
return -ENOMEM;
priv->r100c10 = pci_map_page(device->pdev, priv->r100c10_page, 0,
PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(device->pdev, priv->r100c10))
return -EFAULT;
if (priv->r100c10_page) {
priv->r100c10 = pci_map_page(device->pdev, priv->r100c10_page,
0, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
if (pci_dma_mapping_error(device->pdev, priv->r100c10))
return -EFAULT;
}
return nouveau_fb_preinit(&priv->base);
}