Hello,
I am trying to read a DMA buff ,allocated and manged by driver "A".
reader is a different driver "B" (which simply make DMA buffer accessible by /proc to user space). 
Can dmabuf APIs can be used for all reader and writer synchronization issues ?
I want to use dmabuf between two drivers , do i need to go to user space and use "fd" to get struct dma_buf * from dma_buf_get(int fd).