drm/nouveau: fix oopses caused by clear being called on unpopulated ttms

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drm/nouveau: fix oopses caused by clear being called on unpopulated ttms
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
a10e9e1d · Ben Skeggs · 1a97b4ac · a10e9e1d
Commit a10e9e1d authored Nov 25, 2011 by Ben Skeggs
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drivers/gpu/drm/nouveau/nouveau_sgdma.c drivers/gpu/drm/nouveau/nouveau_sgdma.c +3 -0

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--- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
+++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
@@ -67,7 +67,10 @@ nouveau_sgdma_clear(struct ttm_backend *be)
 			pci_unmap_page(dev->pdev, nvbe->pages[nvbe->nr_pages],
 				       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 		}
+		nvbe->unmap_pages = false;
 	}
+
+	nvbe->pages = NULL;
 }

 static void