[PATCH] drm/prime: drop reference on imported dma-buf come from gem

[Dave Airlie]

On Thu, Sep 27, 2012 at 4:30 PM, Seung-Woo Kim <sw0312.kim at samsung.com> wrote:
> Increasing ref counts of both dma-buf and gem for imported dma-buf come from gem
> makes memory leak. release function of dma-buf cannot be called because f_count
> of dma-buf increased by importing gem and gem ref count cannot be decrease
> because of exported dma-buf.
>
> So I add dma_buf_put() for imported gem come from its own gem into each drivers
> having prime_import and prime_export capabilities. With this, only gem ref
> count is increased if importing gem exported from gem of same driver.

Okay its taken me a while to circle around and get back to this, but
yes I admit this is needed, but I hate implementing it like this

But I think I'll push it and work out a cleaner solution, I should
also go back and look at the older patches.

Dave.