Add checking the buffer size and use const char * for buffer declaration. Coverity issue: 279449 Fixes: ef1e8ede ("raw/ifpga: add Intel FPGA bus rawdev driver") Cc: stable@dpdk.org Signed-off-by: Tianfei Zhang <tianfei.zhang@intel.com> Acked-by: Rosen Xu <rosen.xu@intel.com>