Hi Thierry, Am Mittwoch, 4. Februar 2015, 08:58:09 schrieb Thierry Reding: > From: Thierry Reding <[email protected]> > > The Rockchip IOMMU driver unconditionally executes code and registers a > struct iommu_ops with the platform bus irrespective of whether it runs > on a Rockchip SoC or not. This causes problems in multi-platform kernels > where drivers for other SoCs will no longer be able to register their > own struct iommu_ops or even try to use a struct iommu_ops for an IOMMU > that obviously isn't there. > > The smallest fix I could think of is to check for the existence of any > Rockchip IOMMU devices in the device tree and skip initialization > otherwise. > > This fixes a problem on Tegra20 where the DRM driver will try to use the > obviously non-existent Rockchip IOMMU. > > Reported-by: Nicolas Chauvet <[email protected]> > Cc: Heiko Stuebner <[email protected]> > Cc: Daniel Kurtz <[email protected]> > Signed-off-by: Thierry Reding <[email protected]>
Reviewed-by: Heiko Stuebner <[email protected]> on a rk3288-firefly with drm through the hdmi connector Tested-by: Heiko Stuebner <[email protected]> _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
