diff options
| author | Peng Fan <[email protected]> | 2026-02-10 16:12:16 +0800 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2026-02-26 09:04:46 -0600 |
| commit | efc9be77d851b98b38afcfb4e46d17703057efad (patch) | |
| tree | 1e60d2c76c421bee801b39a826ecf4bce15005a6 | |
| parent | 6ee82240de63b085325b4f4ce4874240724f9dbe (diff) | |
iommu: Validate device tree node in dev_iommu_enable
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]>
| -rw-r--r-- | drivers/iommu/iommu-uclass.c | 3 |
1 files changed, 3 insertions, 0 deletions
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++) { |