[POWERPC] ps3: always make sure were running on a PS3

Add missing checks to PS3 specific drivers ps3av and sys-manager to verify that
we are actually running on a PS3 (pointed out by Arnd).

Correct existing checks in other subsystems/drivers to return -ENODEV instead
of zero.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/ps3/ps3av.c b/drivers/ps3/ps3av.c
index 1926b4d3e1f4..d21e04ccb021 100644
--- a/drivers/ps3/ps3av.c
+++ b/drivers/ps3/ps3av.c
@@ -24,6 +24,8 @@
 #include <linux/reboot.h>
 #include <linux/kernel.h>
 #include <linux/ioctl.h>
+
+#include <asm/firmware.h>
 #include <asm/lv1call.h>
 #include <asm/ps3av.h>
 #include <asm/ps3.h>
@@ -947,7 +949,12 @@ static struct ps3_vuart_port_driver ps3av_driver = {
 
 static int ps3av_module_init(void)
 {
-        int error = ps3_vuart_port_driver_register(&ps3av_driver);
+        int error;
+
+        if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+                return -ENODEV;
+
+        error = ps3_vuart_port_driver_register(&ps3av_driver);
         if (error) {
                 printk(KERN_ERR
                        "%s: ps3_vuart_port_driver_register failed %d\n",