[llvm] [Offload] Do not do not re-initialize RPC server (PR #218757)

[Joseph Huber via llvm-commits]

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@@ -207,6 +207,10 @@ RPCServerTy::isDeviceUsingRPC(plugin::GenericDeviceTy &Device,
 Error RPCServerTy::initDevice(plugin::GenericDeviceTy &Device,
                               plugin::GenericGlobalHandlerTy &Handler,
                               plugin::DeviceImageTy &Image) {
+  std::lock_guard<decltype(BufferMutex)> Lock(BufferMutex);
+  if (Buffers[Device.getDeviceId()])
+    return Error::success();
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jhuber6 wrote:

Thanks, your comment made me think about this more than two seconds and I remembered that this function does both alloc + initialization and the only part we need to skip is the allocation part. Fixed.

https://github.com/llvm/llvm-project/pull/218757