From: Kumar Gala galak@kernel.crashing.org
If the path doesn't start with '/' check to see if it matches some alias under "/aliases" and substitute the matching alias value in the path and retry the lookup.
Signed-off-by: Kumar Gala galak@kernel.crashing.org Acked-by: David Gibson david@gibson.dropbear.id.au Acked-by: Gerald Van Baren vanbaren@cideas.com --- libfdt/fdt_ro.c | 21 +++++++++++++++++++-- 1 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c index d566eba..b09a6e9 100644 --- a/libfdt/fdt_ro.c +++ b/libfdt/fdt_ro.c @@ -143,8 +143,25 @@ int fdt_path_offset(const void *fdt, const char *path)
FDT_CHECK_HEADER(fdt);
- if (*path != '/') - return -FDT_ERR_BADPATH; + /* see if we have an alias */ + if (*path != '/') { + const char *q; + int aliasoffset = fdt_path_offset(fdt, "/aliases"); + + if (aliasoffset < 0) + return -FDT_ERR_BADPATH; + + q = strchr(path, '/'); + if (!q) + q = end; + + p = fdt_getprop_namelen(fdt, aliasoffset, path, q - p, NULL); + if (!p) + return -FDT_ERR_BADPATH; + offset = fdt_path_offset(fdt, p); + + p = q; + }
while (*p) { const char *q;