UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

powerpc/pseries: Pack update_props_workarea to map correctly to rtas buffer header 

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@linux.vnet.ibm.com>
Acked-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Tyrel Datwyler 2013-08-14 22:23:47 -07:00 committed by Benjamin Herrenschmidt
parent 638a405fb5
commit d0ef440350
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/powerpc/platforms/pseries/mobility.c
View File

@ -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