From: Peng Fan <[email protected]>
Similar to pinctrl_select_state(), add dev_has_ofnode() check before doing the
real work. Device(scmi_base.0) does not have a real device node, ofnode_null()
is assigned as the device tree node for scmi base protocol device:
'commit 7eb4eb541c14 ("firmware: scmi: install base protocol to SCMI agent")'
However with recent update in
'commit 0535e46d55d7 ("scripts/dtc: Update to upstream version
v1.7.2-35-g52f07dcca47c")',
SPL panic in fdt_check_node_offset_()->fdt_next_tag(), because offset is -1
and SPL_OF_LIBFDT_ASSUME_MASK is 0xFF.
So need to validate device tree node.
Reported-by: Ye Li <[email protected]>
Closes:
https://lore.kernel.org/u-boot/[email protected]/
Signed-off-by: Peng Fan <[email protected]>
---
drivers/iommu/iommu-uclass.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/iommu/iommu-uclass.c b/drivers/iommu/iommu-uclass.c
index bb31cd519d2..31b40e5713a 100644
--- a/drivers/iommu/iommu-uclass.c
+++ b/drivers/iommu/iommu-uclass.c
@@ -79,6 +79,9 @@ int dev_iommu_enable(struct udevice *dev)
const struct iommu_ops *ops;
int i, count, ret = 0;
+ if (!dev_has_ofnode(dev))
+ return 0;
+
count = dev_count_phandle_with_args(dev, "iommus",
"#iommu-cells", 0);
for (i = 0; i < count; i++) {
--
2.51.0
