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Diffstat (limited to 'drivers/gpu/host1x/dev.c')
| -rw-r--r-- | drivers/gpu/host1x/dev.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c index 46cae925b095..1f93e5e276c0 100644 --- a/drivers/gpu/host1x/dev.c +++ b/drivers/gpu/host1x/dev.c @@ -361,6 +361,10 @@ static bool host1x_wants_iommu(struct host1x *host1x) return true; } +/* + * Returns ERR_PTR on failure, NULL if the translation is IDENTITY, otherwise a + * valid paging domain. + */ static struct iommu_domain *host1x_iommu_attach(struct host1x *host) { struct iommu_domain *domain = iommu_get_domain_for_dev(host->dev); @@ -385,6 +389,8 @@ static struct iommu_domain *host1x_iommu_attach(struct host1x *host) * Similarly, if host1x is already attached to an IOMMU (via the DMA * API), don't try to attach again. */ + if (domain && domain->type == IOMMU_DOMAIN_IDENTITY) + domain = NULL; if (!host1x_wants_iommu(host) || domain) return domain; |