In fpga_update_flash(), "smgr->rsu_length" is passed to a
parameter that cannot be negative. So return value of
function "lseek" should be checked before being assigned
to "smgr->rsu_length".
Coverity issue: 367481
Fixes: a05bd1b40bde ("raw/ifpga: add FPGA RSU APIs")
Signed-off-by: Wei Huang <wei.huang@intel.com>
Acked-by: Tianfei Zhang <tianfei.zhang@intel.com>
Acked-by: Rosen Xu <rosen.xu@intel.com>