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[POWERPC] wrapper: Treat NULL as root node in devp_offset; add devp_offset_find() 

Many operations, as currently used in the wrapper, assume they can
pass NULL and have it be treated as the root node.  However, libfdt-wrapper
converts NULL to -1, which is only appropriate when searching for nodes,
and will cause an error otherwise.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Scott Wood 2007-12-12 08:23:05 +11:00 committed by Paul Mackerras
parent 754e5f3f3a
commit 2a9d2d97d3
1 changed files with 5 additions and 3 deletions
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8
arch/powerpc/boot/libfdt-wrapper.c
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@ -48,7 +48,8 @@
check_err(_offset) ? NULL : (void *)(_offset+1); \
})
#define devp_offset(devp) (((int)(devp))-1)
#define devp_offset_find(devp) (((int)(devp))-1)
#define devp_offset(devp) (devp ? ((int)(devp))-1 : 0)
static void *fdt;
static void *buf; /* = NULL */
@ -127,8 +128,9 @@ static void *fdt_wrapper_find_node_by_prop_value(const void *prev,
const char *val,
int len)
{
return offset_devp(fdt_node_offset_by_prop_value(fdt, devp_offset(prev),
name, val, len));
int offset = fdt_node_offset_by_prop_value(fdt, devp_offset_find(prev),
name, val, len);
return offset_devp(offset);
}
static char *fdt_wrapper_get_path(const void *devp, char *buf, int len)