On Mon, May 14, 2018 at 01:34:27PM +0300, Dmitry Osipenko wrote:
> On 14.05.2018 13:13, Thierry Reding wrote:
> > From: Thierry Reding <treding@xxxxxxxxxx>
> >
> > The IOVA API uses a memory cache to allocate IOVA nodes from. To make
> > sure that this cache is available, obtain a reference to it and release
> > the reference when the cache is no longer needed.
> >
> > On 64-bit ARM this is hidden by the fact that the DMA mapping API gets
> > that reference and never releases it. On 32-bit ARM, this is papered
> > over by the Tegra DRM driver (the sole user of the host1x API requiring
> > the cache) acquiring a reference to the IOVA cache for its own purposes.
> > However, there may be additional users of this API in the future, so fix
> > this upfront to avoid surprises.
> >
> > Fixes: 404bfb78daf3 ("gpu: host1x: Add IOMMU support")
> > Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
> > ---
> > drivers/gpu/host1x/dev.c | 11 ++++++++++-
> > 1 file changed, 10 insertions(+), 1 deletion(-)
Applied, thanks.
Thierry
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