ACPI/IORT: Move the check to get iommu_ops from translated fwspec

With IOMMU probe deferral, iort_iommu_configure can be called
multiple times for the same device. Hence we have a check
to see if the device's fwspec is already translated and return
the iommu_ops from that directly. But the check is wrongly
placed in iort_iommu_xlate, which breaks devices with multiple
sids. Move the check to iort_iommu_configure.

Fixes: 5a1bb638d567 ("drivers: acpi: Handle IOMMU lookup failure with deferred probing or error")
Tested-by: Nate Watterson <nwatters@codeaurora.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index 16e101f..797b28d 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;