diff options
| -rw-r--r-- | lib/efi_loader/efi_device_path.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c index b4e2f933cb6..24a4f40c004 100644 --- a/lib/efi_loader/efi_device_path.c +++ b/lib/efi_loader/efi_device_path.c @@ -126,6 +126,7 @@ static struct efi_object *find_obj(struct efi_device_path *dp, bool short_path, struct efi_device_path **rem) { struct efi_object *efiobj; + unsigned int dp_size = efi_dp_size(dp); list_for_each_entry(efiobj, &efi_obj_list, link) { struct efi_handler *handler; @@ -141,10 +142,18 @@ static struct efi_object *find_obj(struct efi_device_path *dp, bool short_path, do { if (efi_dp_match(dp, obj_dp) == 0) { if (rem) { + /* + * Allow partial matches, but inform + * the caller. + */ *rem = ((void *)dp) + efi_dp_size(obj_dp); + return efiobj; + } else { + /* Only return on exact matches */ + if (efi_dp_size(obj_dp) == dp_size) + return efiobj; } - return efiobj; } obj_dp = shorten_path(efi_dp_next(obj_dp)); @@ -164,8 +173,14 @@ struct efi_object *efi_dp_find_obj(struct efi_device_path *dp, { struct efi_object *efiobj; - efiobj = find_obj(dp, false, rem); + /* Search for an exact match first */ + efiobj = find_obj(dp, false, NULL); + /* Then for a fuzzy match */ + if (!efiobj) + efiobj = find_obj(dp, false, rem); + + /* And now for a fuzzy short match */ if (!efiobj) efiobj = find_obj(dp, true, rem); |