Commit 87fd2b09 authored by Robin Murphy's avatar Robin Murphy Committed by Lyude Paul

drm/nouveau/tegra: Stop using iommu_present()

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: default avatarRobin Murphy <robin.murphy@arm.com>
Reviewed-by: default avatarLyude Paul <lyude@redhat.com>
[added cc for stable]
Signed-off-by: default avatarLyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org # v5.0+
Link: https://patchwork.freedesktop.org/patch/msgid/70d40ea441da3663c2824d54102b471e9a621f8a.1649168494.git.robin.murphy@arm.com
parent b3c9a924
...@@ -123,7 +123,7 @@ nvkm_device_tegra_probe_iommu(struct nvkm_device_tegra *tdev) ...@@ -123,7 +123,7 @@ nvkm_device_tegra_probe_iommu(struct nvkm_device_tegra *tdev)
mutex_init(&tdev->iommu.mutex); mutex_init(&tdev->iommu.mutex);
if (iommu_present(&platform_bus_type)) { if (device_iommu_mapped(dev)) {
tdev->iommu.domain = iommu_domain_alloc(&platform_bus_type); tdev->iommu.domain = iommu_domain_alloc(&platform_bus_type);
if (!tdev->iommu.domain) if (!tdev->iommu.domain)
goto error; goto error;
......
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