Patch "of/unittest: Add test that of_address_to_resource() fails on non-translatable address" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    of/unittest: Add test that of_address_to_resource() fails on non-translatable address

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     of-unittest-add-test-that-of_address_to_resource-fai.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit f7dbdda4deccd145ab275e9abe95cec69daaeedb
Author: Rob Herring (Arm) <robh@xxxxxxxxxx>
Date:   Fri Jan 10 15:50:28 2025 -0600

    of/unittest: Add test that of_address_to_resource() fails on non-translatable address
    
    [ Upstream commit 44748065ed321041db6e18cdcaa8c2a9554768ac ]
    
    of_address_to_resource() on a non-translatable address should return an
    error. Additionally, this case also triggers a spurious WARN for
    missing #address-cells/#size-cells.
    
    Link: https://lore.kernel.org/r/20250110215030.3637845-1-robh@xxxxxxxxxx
    Signed-off-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/of/unittest-data/tests-platform.dtsi b/drivers/of/unittest-data/tests-platform.dtsi
index fa39611071b32..cd310b26b50c8 100644
--- a/drivers/of/unittest-data/tests-platform.dtsi
+++ b/drivers/of/unittest-data/tests-platform.dtsi
@@ -34,5 +34,18 @@ dev@100 {
 				};
 			};
 		};
+
+		platform-tests-2 {
+			// No #address-cells or #size-cells
+			node {
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				test-device@100 {
+					compatible = "test-sub-device";
+					reg = <0x100 1>;
+				};
+			};
+		};
 	};
 };
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 7986113adc7d3..3b22c36bfb0b7 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1186,6 +1186,7 @@ static void __init of_unittest_bus_3cell_ranges(void)
 static void __init of_unittest_reg(void)
 {
 	struct device_node *np;
+	struct resource res;
 	int ret;
 	u64 addr, size;
 
@@ -1202,6 +1203,19 @@ static void __init of_unittest_reg(void)
 		np, addr);
 
 	of_node_put(np);
+
+	np = of_find_node_by_path("/testcase-data/platform-tests-2/node/test-device@100");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	ret = of_address_to_resource(np, 0, &res);
+	unittest(ret == -EINVAL, "of_address_to_resource(%pOF) expected error on untranslatable address\n",
+		 np);
+
+	of_node_put(np);
+
 }
 
 static void __init of_unittest_parse_interrupts(void)