Merge tag 'platform-drivers-x86-v4.12-2' of git://git.infradead.org/linux-platform...

[karo-tx-linux.git] / drivers / acpi / arm64 / iort.c

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index c5fecf97ee2f52bd11188a0cd2295bd82d5d02db..797b28dc7b3410cda1e775e55d2e1d2362254dd9 100644 (file)
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -666,14 +666,6 @@ static const struct iommu_ops *iort_iommu_xlate(struct device *dev,
        int ret = -ENODEV;
        struct fwnode_handle *iort_fwnode;
 
-       /*
-        * If we already translated the fwspec there
-        * is nothing left to do, return the iommu_ops.
-        */
-       ops = iort_fwspec_iommu_ops(dev->iommu_fwspec);
-       if (ops)
-               return ops;
-
        if (node) {
                iort_fwnode = iort_get_fwnode(node);
                if (!iort_fwnode)
@@ -735,6 +727,14 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
        u32 streamid = 0;
        int err;
 
+       /*
+        * If we already translated the fwspec there
+        * is nothing left to do, return the iommu_ops.
+        */
+       ops = iort_fwspec_iommu_ops(dev->iommu_fwspec);
+       if (ops)
+               return ops;
+
        if (dev_is_pci(dev)) {
                struct pci_bus *bus = to_pci_dev(dev)->bus;
                u32 rid;
@@ -782,6 +782,12 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
        if (err)
                ops = ERR_PTR(err);
 
+       /* Ignore all other errors apart from EPROBE_DEFER */
+       if (IS_ERR(ops) && (PTR_ERR(ops) != -EPROBE_DEFER)) {
+               dev_dbg(dev, "Adding to IOMMU failed: %ld\n", PTR_ERR(ops));
+               ops = NULL;
+       }
+
        return ops;
 }