From: Robin Murphy <robin.murphy@xxxxxxx> [ 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.murphy@xxxxxxx> Reviewed-by: Rob Clark <robdclark@xxxxxxxxx> Patchwork: https://patchwork.freedesktop.org/patch/480707/ Link: https://lore.kernel.org/r/5ab4f4574d7f3e042261da702d493ee40d003356.1649168268.git.robin.murphy@xxxxxxx Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- 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 555666e3f960..5959527efc6e 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -427,7 +427,7 @@ 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
