---

yaml --- r: 198024 b: refs/heads/master c: 8bfe9b5 h: refs/heads/master v: v3
git-mirror · Apr 29, 2010 · 32f4467 · 32f4467
1 parent 1716a8e
commit 32f4467
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Showing 3 changed files with 18 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cf32eb89cb4e674f88e4af5025839d85d02485c6
+refs/heads/master: 8bfe9b5c3a684fe39eb58a65e466c103d1c32c9a
diff --git a/trunk/drivers/of/fdt.c b/trunk/drivers/of/fdt.c
@@ -556,6 +556,21 @@ void __init unflatten_device_tree(void)
 
 	pr_debug(" -> unflatten_device_tree()\n");
 
+	if (!initial_boot_params) {
+		pr_debug("No device tree pointer\n");
+		return;
+	}
+
+	pr_debug("Unflattening device tree:\n");
+	pr_debug("magic: %08x\n", be32_to_cpu(initial_boot_params->magic));
+	pr_debug("size: %08x\n", be32_to_cpu(initial_boot_params->totalsize));
+	pr_debug("version: %08x\n", be32_to_cpu(initial_boot_params->version));
+
+	if (be32_to_cpu(initial_boot_params->magic) != OF_DT_HEADER) {
+		pr_err("Invalid device tree blob header\n");
+		return;
+	}
+
 	/* First pass, scan for size */
 	start = ((unsigned long)initial_boot_params) +
 		be32_to_cpu(initial_boot_params->off_dt_struct);

diff --git a/trunk/include/linux/of_fdt.h b/trunk/include/linux/of_fdt.h
@@ -99,6 +99,8 @@ extern int early_init_dt_scan_root(unsigned long node, const char *uname,
 /* Other Prototypes */
 extern void unflatten_device_tree(void);
 extern void early_init_devtree(void *);
+#else /* CONFIG_OF_FLATTREE */
+static inline void unflatten_device_tree(void) {}
 #endif /* CONFIG_OF_FLATTREE */
 
 #endif /* __ASSEMBLY__ */