[PATCH part1 v2 8/9] ps3flash: Refuse to work in lpars other than OtherOS

[Andre Heider <a.heider@gmail.com>]

The driver implements a character and misc device, meant for the
axed OtherOS to exchange various settings with GameOS.
Since Firmware 3.21 there is no support anymore to write these
settings, so test if we're running in OtherOS, and refuse to load
if that is not the case.

Signed-off-by: Andre Heider <a.heider@gmail.com>
---
 arch/powerpc/platforms/ps3/Kconfig |    2 +-
 drivers/char/ps3flash.c            |    7 +++++++
 2 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/platforms/ps3/Kconfig b/arch/powerpc/platforms/ps3/Kconfig
index 84df5c8..72fdecd 100644
--- a/arch/powerpc/platforms/ps3/Kconfig
+++ b/arch/powerpc/platforms/ps3/Kconfig
@@ -121,7 +121,7 @@ config PS3_FLASH
 
 	  This support is required to access the PS3 FLASH ROM, which
 	  contains the boot loader and some boot options.
-	  In general, all users will say Y or M.
+	  In general, all PS3 OtherOS users will say Y or M.
 
 	  As this driver needs a fixed buffer of 256 KiB of memory, it can
 	  be disabled on the kernel command line using "ps3flash=off", to
diff --git a/drivers/char/ps3flash.c b/drivers/char/ps3flash.c
index d0c57c2..fc6d867 100644
--- a/drivers/char/ps3flash.c
+++ b/drivers/char/ps3flash.c
@@ -25,6 +25,7 @@
 
 #include <asm/lv1call.h>
 #include <asm/ps3stor.h>
+#include <asm/firmware.h>
 
 
 #define DEVICE_NAME		"ps3flash"
@@ -464,6 +465,12 @@ static struct ps3_system_bus_driver ps3flash = {
 
 static int __init ps3flash_init(void)
 {
+	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+		return -ENODEV;
+
+	if (ps3_get_ss_laid() != PS3_SS_LAID_OTHEROS)
+		return -ENODEV;
+
 	return ps3_system_bus_driver_register(&ps3flash);
 }
 
-- 
1.7.5.4