[PATCH] ppc64: Check of_chosen in check_for_initrd()

You can't call get_property() on a NULL node, so check if of_chosen is set
in check_for_initrd().

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>

 arch/ppc64/kernel/setup.c |   20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 12 insertions, 8 deletions

diff --git a/arch/ppc64/kernel/setup.c b/arch/ppc64/kernel/setup.c
index b3ef8df12982..ee3b20de2e7a 100644
--- a/arch/ppc64/kernel/setup.c
+++ b/arch/ppc64/kernel/setup.c
@@ -536,15 +536,19 @@ static void __init check_for_initrd(void)
 
         DBG(" -> check_for_initrd()\n");
 
-        prop = (u64 *)get_property(of_chosen, "linux,initrd-start", NULL);
-        if (prop != NULL) {
-                initrd_start = (unsigned long)__va(*prop);
-                prop = (u64 *)get_property(of_chosen, "linux,initrd-end", NULL);
+        if (of_chosen) {
+                prop = (u64 *)get_property(of_chosen,
+                                "linux,initrd-start", NULL);
                 if (prop != NULL) {
-                        initrd_end = (unsigned long)__va(*prop);
-                        initrd_below_start_ok = 1;
-                } else
-                        initrd_start = 0;
+                        initrd_start = (unsigned long)__va(*prop);
+                        prop = (u64 *)get_property(of_chosen,
+                                        "linux,initrd-end", NULL);
+                        if (prop != NULL) {
+                                initrd_end = (unsigned long)__va(*prop);
+                                initrd_below_start_ok = 1;
+                        } else
+                                initrd_start = 0;
+                }
         }
 
         /* If we were passed an initrd, set the ROOT_DEV properly if the values