grub2/0257-arm64-make-sure-fdt-has-address-cells-and-size-cells.patch

From 5b96ea4e3ed516424ed82c2950a9d6f29693c66f Mon Sep 17 00:00:00 2001
From: Mark Salter <msalter@redhat.com>
Date: Mon, 17 Apr 2017 08:44:29 -0400
Subject: [PATCH] arm64: make sure fdt has #address-cells and #size-cells
 properties

Recent upstream changes to kexec-tools relies on #address-cells
and #size-cells properties in the FDT. If grub2 needs to create
a chosen node, it is likely because firmware did not provide one.
In that case, set #address-cells and #size-cells properties to
make sure they exist.
---
 grub-core/loader/arm64/linux.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/grub-core/loader/arm64/linux.c b/grub-core/loader/arm64/linux.c
index fcab2ed37e7..84670a053b2 100644
--- a/grub-core/loader/arm64/linux.c
+++ b/grub-core/loader/arm64/linux.c
@@ -80,7 +80,21 @@ finalize_params_linux (void)
 
   node = grub_fdt_find_subnode (fdt, 0, "chosen");
   if (node < 0)
-    node = grub_fdt_add_subnode (fdt, 0, "chosen");
+    {
+      /*
+       * If we have to create a chosen node, Make sure we
+       * have #address-cells and #size-cells properties.
+       */
+      retval = grub_fdt_set_prop32(fdt, 0, "#address-cells", 2);
+      if (retval)
+	goto failure;
+
+      retval = grub_fdt_set_prop32(fdt, 0, "#size-cells", 2);
+      if (retval)
+	goto failure;
+
+      node = grub_fdt_add_subnode (fdt, 0, "chosen");
+    }
 
   if (node < 1)
     goto failure;