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NvDrv/nvhost-as-gpu: Ensure that the object passed to MapBufferEx has already been allocated.
Also added a consistency check and a comment for the case when the object id is different than its handle. The real nvservices doesn't make a distinction between ids and handles, each object gets an unique handle which doubles as its id.
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@ -108,6 +108,16 @@ u32 nvhost_as_gpu::MapBufferEx(const std::vector<u8>& input, std::vector<u8>& ou
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auto object = nvmap_dev->GetObject(params.nvmap_handle);
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ASSERT(object);
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// We can only map objects that have already been assigned a CPU address.
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ASSERT(object->status == nvmap::Object::Status::Allocated);
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ASSERT(params.buffer_offset == 0);
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// The real nvservices doesn't make a distinction between handles and ids, and
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// object can only have one handle and it will be the same as its id. Assert that this is the
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// case to prevent unexpected behavior.
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ASSERT(object->id == params.nvmap_handle);
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auto& gpu = Core::System::GetInstance().GPU();
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if (params.flags & 1) {
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