Get the dma_buf handle directly from 'vm_file' after doing necessary checks on the file. Change-Id: Id5eec16588d64e4e28483b32bb52d4d3d9b86b99 Signed-off-by: ravnar <quic_ravnar@quicinc.com> Signed-off-by: Sanjay Yadav <quic_sanjyada@quicinc.com>