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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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2
drivers/gpu/drm/tegra/dc.c
View file

@ -2017,7 +2017,7 @@ static int tegra_dc_init(struct host1x_client *client)
dev_warn(dc->dev, "failed to allocate syncpoint\n");
err = host1x_client_iommu_attach(client);
if (err < 0) {
if (err < 0 && err != -ENODEV) {
dev_err(client->dev, "failed to attach to domain: %d\n", err);
return err;
}

4
drivers/gpu/drm/tegra/drm.c
View file

@ -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);

2
drivers/gpu/drm/tegra/vic.c
View file

@ -167,7 +167,7 @@ static int vic_init(struct host1x_client *client)
int err;
err = host1x_client_iommu_attach(client);
if (err < 0) {
if (err < 0 && err != -ENODEV) {
dev_err(vic->dev, "failed to attach to domain: %d\n", err);
return err;
}