[PATCH 2/3] power: domain: Validate device tree node in dev_power_domain_ctrl

[Peng Fan (OSS)]

From: Peng Fan <peng.fan at nxp.com>

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 <ye.li at nxp.com>
Closes: https://lore.kernel.org/u-boot/939a9696-27fa-45a1-b428-feffe21ac6d5@oss.nxp.com/
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 drivers/power/domain/power-domain-uclass.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/power/domain/power-domain-uclass.c b/drivers/power/domain/power-domain-uclass.c
index d9fa8ad4bd2..cea68945cbd 100644
--- a/drivers/power/domain/power-domain-uclass.c
+++ b/drivers/power/domain/power-domain-uclass.c
@@ -180,6 +180,9 @@ static int dev_power_domain_ctrl(struct udevice *dev, bool on)
 	struct power_domain pd;
 	int i, count, ret = 0;
 
+	if (!dev_has_ofnode(dev))
+		return 0;
+
 	count = dev_count_phandle_with_args(dev, "power-domains",
 					    "#power-domain-cells", 0);
 	for (i = 0; i < count; i++) {

-- 
2.51.0