[PATCH 3/8] powerpc/pseries: pack update_props_workarea to map correctly to rtas buffer header

[Tyrel Datwyler]

The work area buffer returned by the ibm,update-properties rtas call contains
20 bytes of header information prior to the property value descriptor data.
Currently update_dt_node tries to advance over this header using sizeof(upwa).
The update_props_workarea struct contains 20 bytes worth of fields, that map
to the relevant header data, but the sizeof the structure is 24 bytes due to
4 bytes of padding at the end of the structure. Packing the structure ensures
that we don't advance too far over the rtas buffer.

Signed-off-by: Tyrel Datwyler <tyreld at linux.vnet.ibm.com>
---
 arch/powerpc/platforms/pseries/mobility.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
index aaae85d..023e354 100644
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -28,7 +28,7 @@ struct update_props_workarea {
 	u32 state;
 	u64 reserved;
 	u32 nprops;
-};
+} __packed;
 
 #define NODE_ACTION_MASK	0xff000000
 #define NODE_COUNT_MASK		0x00ffffff
-- 
1.7.12.4