From: Ben Skeggs Date: Thu, 12 Aug 2010 00:23:06 +0000 (+1000) Subject: drm/nouveau: check for error when allocating/mapping dummy page X-Git-Tag: v2.6.36-rc3~46^2^2~7 X-Git-Url: https://bbs.cooldavid.org/git/?a=commitdiff_plain;h=bd6aaea89318bd3aede9e219d6a003afd9978d5b;p=net-next-2.6.git drm/nouveau: check for error when allocating/mapping dummy page Signed-off-by: Ben Skeggs --- diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c b/drivers/gpu/drm/nouveau/nouveau_sgdma.c index 491767fe4fc..6b9187d7f67 100644 --- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c +++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c @@ -214,6 +214,7 @@ int nouveau_sgdma_init(struct drm_device *dev) { struct drm_nouveau_private *dev_priv = dev->dev_private; + struct pci_dev *pdev = dev->pdev; struct nouveau_gpuobj *gpuobj = NULL; uint32_t aper_size, obj_size; int i, ret; @@ -239,10 +240,19 @@ nouveau_sgdma_init(struct drm_device *dev) dev_priv->gart_info.sg_dummy_page = alloc_page(GFP_KERNEL|__GFP_DMA32); + if (!dev_priv->gart_info.sg_dummy_page) { + nouveau_gpuobj_del(dev, &gpuobj); + return -ENOMEM; + } + set_bit(PG_locked, &dev_priv->gart_info.sg_dummy_page->flags); dev_priv->gart_info.sg_dummy_bus = - pci_map_page(dev->pdev, dev_priv->gart_info.sg_dummy_page, 0, + pci_map_page(pdev, dev_priv->gart_info.sg_dummy_page, 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); + if (pci_dma_mapping_error(pdev, dev_priv->gart_info.sg_dummy_bus)) { + nouveau_gpuobj_del(dev, &gpuobj); + return -EFAULT; + } if (dev_priv->card_type < NV_50) { /* Maybe use NV_DMA_TARGET_AGP for PCIE? NVIDIA do this, and