cadence_gem: Avoid infinite loops with a misconfigured buffer
A guest can write zero to the DMACFG resulting in an infinite loop when it reaches the while(bytes_to_copy) loop. To avoid this issue enforce a minimum size for the RX buffer. Hardware does not have this enforcement and relies on the guest to set a non-zero value. Signed-off-by: NAlistair Francis <alistair.francis@xilinx.com> Reported-by: NLi Qiang <liqiang6-s@360.cn> Reported-by: NP J P <ppandit@redhat.com> Message-id: 84bb1c391b833275da3f573d4972920cea34c188.1466539342.git.alistair.francis@xilinx.com Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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