From: Robin Murphy <robin.mur...@arm.com> [ Upstream commit e2a88eabb02410267519b838fb9b79f5206769be ]
Even if some IOMMU has registered itself on the platform "bus", that doesn't necessarily mean it provides translation for the device we care about. Replace iommu_present() with a more appropriate check. Signed-off-by: Robin Murphy <robin.mur...@arm.com> Reviewed-by: Rob Clark <robdcl...@gmail.com> Patchwork: https://patchwork.freedesktop.org/patch/480707/ Link: https://lore.kernel.org/r/5ab4f4574d7f3e042261da702d493ee40d003356.1649168268.git.robin.mur...@arm.com Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org> Signed-off-by: Rob Clark <robdcl...@chromium.org> Signed-off-by: Sasha Levin <sas...@kernel.org> --- drivers/gpu/drm/msm/msm_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index bbf999c66517..d6d40429016d 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -403,7 +403,7 @@ bool msm_use_mmu(struct drm_device *dev) struct msm_drm_private *priv = dev->dev_private; /* a2xx comes with its own MMU */ - return priv->is_a2xx || iommu_present(&platform_bus_type); + return priv->is_a2xx || device_iommu_mapped(dev->dev); } static int msm_init_vram(struct drm_device *dev) -- 2.35.1
