Index: linux-3.10.14/arch/mips/ralink/nvram.c
===================================================================
--- linux-3.10.14.orig/arch/mips/ralink/nvram.c
+++ linux-3.10.14/arch/mips/ralink/nvram.c
@@ -797,6 +797,11 @@ char const *nvram_get(int index, char *n
 
 	RANV_CHECK_INDEX(NULL);
 
+	if (!nvram_sem) {
+		printk("%s(%d,%s), sem not inited yet!\n", __FUNCTION__, index, name);
+		return NULL;
+	}
+
 	if (down_interruptible(nvram_sem)) {
 		printk("%s(%d): get nvram_sem fail\n", __func__, __LINE__);
 		return NULL;
@@ -895,7 +900,7 @@ int nvram_getall(int index, char *buf)
 module_init(ra_nvram_init);
 MODULE_LICENSE("GPL");
 #else
-late_initcall(ra_nvram_init);
+subsys_initcall(ra_nvram_init);
 #endif
 module_exit(ra_nvram_exit);
 EXPORT_SYMBOL(nvram_get);