From: Rich Felker <dalias@libc.org>
Date: Mon, 31 Jul 2017 05:27:50 +0000 (-0400)
Subject: sh: fix memory corruption of unflattened device tree
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=eb6b6930a70faefe04479a71088cc10366782d9a;p=openwrt%2Fstaging%2Fblogic.git

sh: fix memory corruption of unflattened device tree

unflatten_device_tree() makes use of memblock allocation, and
therefore must be called before paging_init() migrates the memblock
allocation data to the bootmem framework. Otherwise the record of the
allocation for the expanded device tree will be lost, and will
eventually be clobbered when allocated for another use.

Signed-off-by: Rich Felker <dalias@libc.org>
---

diff --git a/arch/sh/boards/of-generic.c b/arch/sh/boards/of-generic.c
index 4feb7c86f4ac..46b2481eec90 100644
--- a/arch/sh/boards/of-generic.c
+++ b/arch/sh/boards/of-generic.c
@@ -126,12 +126,6 @@ static void __init sh_of_setup(char **cmdline_p)
 {
 	struct device_node *root;
 
-#ifdef CONFIG_USE_BUILTIN_DTB
-	unflatten_and_copy_device_tree();
-#else
-	unflatten_device_tree();
-#endif
-
 	board_time_init = sh_of_time_init;
 
 	sh_mv.mv_name = "Unknown SH model";
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index b95c411d0333..d34e998b809f 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -330,6 +330,14 @@ void __init setup_arch(char **cmdline_p)
 	/* Let earlyprintk output early console messages */
 	early_platform_driver_probe("earlyprintk", 1, 1);
 
+#ifdef CONFIG_OF_FLATTREE
+#ifdef CONFIG_USE_BUILTIN_DTB
+	unflatten_and_copy_device_tree();
+#else
+	unflatten_device_tree();
+#endif
+#endif
+
 	paging_init();
 
 #ifdef CONFIG_DUMMY_CONSOLE