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drm/nouveau/instmem/gk20a: fix crash during error path

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If a memory allocation fails when using the DMA allocator,
gk20a_instobj_dtor_dma() will be called on the failed instmem object.
At this time, node->handle might not be NULL despite the call to
dma_alloc_attrs() having failed. node->cpuaddr is the right member to
check for such a failure, so use it instead.

Reported-by: Vince Hsu <vinceh@nvidia.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Alexandre Courbot 2015-03-10 15:46:08 +09:00 committed by Ben Skeggs
parent b03eaa4d34
commit df16896b86
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/nouveau/nvkm/subdev/instmem/gk20a.c
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@ -148,7 +148,7 @@ gk20a_instobj_dtor_dma(struct gk20a_instobj_priv *_node)
struct gk20a_instmem_priv *priv = (void *)nvkm_instmem(node);
struct device *dev = nv_device_base(nv_device(priv));
if (unlikely(!node->handle))
if (unlikely(!node->cpuaddr))
return;
dma_free_attrs(dev, _node->mem->size << PAGE_SHIFT, node->cpuaddr,