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drm/nouveau: fix null pointer deref on pre-nv50 chipsets

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-06-13 12:23:35 +10:00
parent 24f246ac10
commit bf08bcc6b7
1 changed files with 11 additions and 5 deletions
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16
drivers/gpu/drm/nouveau/nouveau_object.c
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@ -870,16 +870,22 @@ void
nouveau_gpuobj_channel_takedown(struct nouveau_channel *chan)
{
struct drm_device *dev = chan->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
int i;
NV_DEBUG(dev, "ch%d\n", chan->id);
for (i = 0; i < 2; i++) {
struct nv50_display_crtc *dispc = &nv50_display(dev)->crtc[i];
nouveau_bo_vma_del(dispc->sem.bo, &chan->dispc_vma[i]);
if (dev_priv->card_type >= NV_50) {
struct nv50_display *disp = nv50_display(dev);
for (i = 0; i < 2; i++) {
struct nv50_display_crtc *dispc = &disp->crtc[i];
nouveau_bo_vma_del(dispc->sem.bo, &chan->dispc_vma[i]);
}
nouveau_vm_ref(NULL, &chan->vm, chan->vm_pd);
nouveau_gpuobj_ref(NULL, &chan->vm_pd);
}
nouveau_vm_ref(NULL, &chan->vm, chan->vm_pd);
nouveau_gpuobj_ref(NULL, &chan->vm_pd);
if (drm_mm_initialized(&chan->ramin_heap))
drm_mm_takedown(&chan->ramin_heap);