Re: [Linaro-mm-sig] [RFC] dma-shared-buf: Add buffer sharing framework

On Wed, Aug 10, 2011 at 7:11 AM, Sumit Semwal sumit.semwal@ti.com wrote:

+/**

• • struct dma_buf - shared buffer object
• • @file: file pointer used for sharing buffers across, and for refcounting.
• • @ops: dma_buf_ops associated with this buffer object
• • @priv: user specific private data
• */

+struct dma_buf {

• struct file *file;
• struct dma_buf_ops *ops;
• void *priv;

+};

hmm, I wonder if we should stuff a ptr in there to store the creating driver (or device?) ptr? This way if it somehow gets passed back to the creating driver, it could realize that it is a dma_buf that it created in the first place.. and that it was safe to cast and deref the priv ptr.

BR, -R