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drm/tegra: Silence expected errors on IOMMU attach

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Subdevices may not be hooked up to an IOMMU via device tree. Detect such
situations and avoid confusing users by not emitting an error message.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding
2019-12-03 17:19:12 +01:00
parent 82d73874d4
commit a8817489dc
3 changed files with 3 additions and 5 deletions
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4
drivers/gpu/drm/tegra/drm.c
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@@ -920,10 +920,8 @@ int host1x_client_iommu_attach(struct host1x_client *client)
if (tegra->domain) {
group = iommu_group_get(client->dev);
if (!group) {
dev_err(client->dev, "failed to get IOMMU group\n");
if (!group)
return -ENODEV;
}
if (domain != tegra->domain) {
err = iommu_attach_group(tegra->domain, group);