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a6d6e37901
We use the local variable 'buf' only when we call dma_memory_read(), and it is always set to &tx_send_buffer[prev_buf_size] immediately before both of those calls. So remove the variable and pass tx_send_buffer + prev_buf_size to dma_memory_read(). This fixes in passing a place where we set buf = tx_send_buffer but never used that value because we always updated buf to something else later before using it. Coverity: CID 1534027 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Jason Wang <jasowang@redhat.com>