[PATCH] ppc64: Fix for valid nvram rtas tokens.

From: Olaf Hering <olh@suse.de>

Fix for valid nvram rtas tokens.

arch/ppc64/kernel/pSeries_nvram.c

@@ -41,7 +41,8 @@ static ssize_t pSeries_nvram_read(char *buf, size_t count, loff_t *index)
 	unsigned long flags;
 	char *p = buf;
 
-	if (nvram_size == 0 || nvram_fetch)
+
+	if (nvram_size == 0 || nvram_fetch == RTAS_UNKNOWN_SERVICE)
 		return -ENODEV;
 
 	if (*index >= nvram_size)
@@ -83,7 +84,7 @@ static ssize_t pSeries_nvram_write(char *buf, size_t count, loff_t *index)
 	unsigned long flags;
 	const char *p = buf;
 
-	if (nvram_size == 0 || nvram_store)
+	if (nvram_size == 0 || nvram_store == RTAS_UNKNOWN_SERVICE)
 		return -ENODEV;
 
 	if (*index >= nvram_size)