Patch "of: unittest: Fix compile in the non-dynamic case" has been added to the 5.15-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    of: unittest: Fix compile in the non-dynamic case

to the 5.15-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-fix-compile-in-the-non-dynamic-case.patch
and it can be found in the queue-5.15 subdirectory.

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



commit 8ad1dc0d280b26e50c79c517db641fa74ddcb630
Author: Christian A. Ehrhardt <lk@xxxxxxx>
Date:   Mon Jan 29 20:25:56 2024 +0100

    of: unittest: Fix compile in the non-dynamic case
    
    [ Upstream commit 607aad1e4356c210dbef9022955a3089377909b2 ]
    
    If CONFIG_OF_KOBJ is not set, a device_node does not contain a
    kobj and attempts to access the embedded kobj via kref_read break
    the compile.
    
    Replace affected kref_read calls with a macro that reads the
    refcount if it exists and returns 1 if there is no embedded kobj.
    
    Reported-by: kernel test robot <lkp@xxxxxxxxx>
    Closes: https://lore.kernel.org/oe-kbuild-all/202401291740.VP219WIz-lkp@xxxxxxxxx/
    Fixes: 4dde83569832 ("of: Fix double free in of_parse_phandle_with_args_map")
    Signed-off-by: Christian A. Ehrhardt <lk@xxxxxxx>
    Link: https://lore.kernel.org/r/20240129192556.403271-1-lk@xxxxxxx
    Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 699daf0645d1..5a8d37cef0ba 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -49,6 +49,12 @@ static struct unittest_results {
 	failed; \
 })
 
+#ifdef CONFIG_OF_KOBJ
+#define OF_KREF_READ(NODE) kref_read(&(NODE)->kobj.kref)
+#else
+#define OF_KREF_READ(NODE) 1
+#endif
+
 /*
  * Expected message may have a message level other than KERN_INFO.
  * Print the expected message only if the current loglevel will allow
@@ -562,7 +568,7 @@ static void __init of_unittest_parse_phandle_with_args_map(void)
 			pr_err("missing testcase data\n");
 			return;
 		}
-		prefs[i] = kref_read(&p[i]->kobj.kref);
+		prefs[i] = OF_KREF_READ(p[i]);
 	}
 
 	rc = of_count_phandle_with_args(np, "phandle-list", "#phandle-cells");
@@ -685,9 +691,9 @@ static void __init of_unittest_parse_phandle_with_args_map(void)
 	unittest(rc == -EINVAL, "expected:%i got:%i\n", -EINVAL, rc);
 
 	for (i = 0; i < ARRAY_SIZE(p); ++i) {
-		unittest(prefs[i] == kref_read(&p[i]->kobj.kref),
+		unittest(prefs[i] == OF_KREF_READ(p[i]),
 			 "provider%d: expected:%d got:%d\n",
-			 i, prefs[i], kref_read(&p[i]->kobj.kref));
+			 i, prefs[i], OF_KREF_READ(p[i]));
 		of_node_put(p[i]);
 	}
 }