Patch "of: unittest: Add bus address range parsing tests" has been added to the 5.10-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 bus address range parsing tests

to the 5.10-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-bus-address-range-parsing-tests.patch
and it can be found in the queue-5.10 subdirectory.

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



commit 29f2f3ced2ef45609c453f87d322c18589ce7c33
Author: Rob Herring <robh@xxxxxxxxxx>
Date:   Tue Mar 28 15:15:56 2023 -0500

    of: unittest: Add bus address range parsing tests
    
    [ Upstream commit 6d32dadb11a6480be62c6ada901bbdcbda1775c9 ]
    
    While there are tests for "dma-ranges" helpers, "ranges" is missing any
    tests. It's the same underlying code, but for completeness add a test
    for "ranges" parsing iterators. This is in preparation to add some
    additional "ranges" helpers.
    
    Link: https://lore.kernel.org/r/20230328-dt-address-helpers-v1-1-e2456c3e77ab@xxxxxxxxxx
    Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
    Stable-dep-of: 7f05e20b989a ("of: address: Preserve the flags portion on 1:1 dma-ranges mapping")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index a334c68db339..cb199ace8681 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1018,6 +1018,58 @@ static void __init of_unittest_pci_dma_ranges(void)
 	of_node_put(np);
 }
 
+static void __init of_unittest_bus_ranges(void)
+{
+	struct device_node *np;
+	struct of_range range;
+	struct of_range_parser parser;
+	int i = 0;
+
+	np = of_find_node_by_path("/testcase-data/address-tests");
+	if (!np) {
+		pr_err("missing testcase data\n");
+		return;
+	}
+
+	if (of_range_parser_init(&parser, np)) {
+		pr_err("missing ranges property\n");
+		return;
+	}
+
+	/*
+	 * Get the "ranges" from the device tree
+	 */
+	for_each_of_range(&parser, &range) {
+		unittest(range.flags == IORESOURCE_MEM,
+			"for_each_of_range wrong flags on node %pOF flags=%x (expected %x)\n",
+			np, range.flags, IORESOURCE_MEM);
+		if (!i) {
+			unittest(range.size == 0x40000000,
+				 "for_each_of_range wrong size on node %pOF size=%llx\n",
+				 np, range.size);
+			unittest(range.cpu_addr == 0x70000000,
+				 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
+				 range.cpu_addr, np);
+			unittest(range.bus_addr == 0x70000000,
+				 "for_each_of_range wrong bus addr (%llx) on node %pOF",
+				 range.pci_addr, np);
+		} else {
+			unittest(range.size == 0x20000000,
+				 "for_each_of_range wrong size on node %pOF size=%llx\n",
+				 np, range.size);
+			unittest(range.cpu_addr == 0xd0000000,
+				 "for_each_of_range wrong CPU addr (%llx) on node %pOF",
+				 range.cpu_addr, np);
+			unittest(range.bus_addr == 0x00000000,
+				 "for_each_of_range wrong bus addr (%llx) on node %pOF",
+				 range.pci_addr, np);
+		}
+		i++;
+	}
+
+	of_node_put(np);
+}
+
 static void __init of_unittest_parse_interrupts(void)
 {
 	struct device_node *np;
@@ -3318,6 +3370,7 @@ static int __init of_unittest(void)
 	of_unittest_dma_get_max_cpu_address();
 	of_unittest_parse_dma_ranges();
 	of_unittest_pci_dma_ranges();
+	of_unittest_bus_ranges();
 	of_unittest_match_node();
 	of_unittest_platform_populate();
 	of_unittest_overlay();