commit_packed_refs(): remove call to `packed_refs_unlock()`

Instead, change the callers of `commit_packed_refs()` to call
`packed_refs_unlock()`.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

refs/files-backend.c

@@ -1131,6 +1131,7 @@ static int files_pack_refs(struct ref_store *ref_store, unsigned int flags)
 
 	if (commit_packed_refs(refs->packed_ref_store, &err))
 		die("unable to overwrite old ref-pack file: %s", err.buf);
+	packed_refs_unlock(refs->packed_ref_store);
 
 	prune_refs(refs, refs_to_prune);
 	strbuf_release(&err);
@@ -2699,6 +2700,7 @@ static int files_initial_transaction_commit(struct ref_store *ref_store,
 	}
 
 cleanup:
+	packed_refs_unlock(refs->packed_ref_store);
 	transaction->state = REF_TRANSACTION_CLOSED;
 	string_list_clear(&affected_refnames, 0);
 	return ret;

refs/packed-backend.c

@@ -606,7 +606,6 @@ int commit_packed_refs(struct ref_store *ref_store, struct strbuf *err)
 	struct packed_ref_cache *packed_ref_cache =
 		get_packed_ref_cache(refs);
 	int ok;
-	int ret = -1;
 	struct strbuf sb = STRBUF_INIT;
 	FILE *out;
 	struct ref_iterator *iter;
@@ -619,7 +618,7 @@ int commit_packed_refs(struct ref_store *ref_store, struct strbuf *err)
 		strbuf_addf(err, "unable to create file %s: %s",
 			    sb.buf, strerror(errno));
 		strbuf_release(&sb);
-		goto out;
+		return -1;
 	}
 	strbuf_release(&sb);
 
@@ -660,18 +659,14 @@ int commit_packed_refs(struct ref_store *ref_store, struct strbuf *err)
 	if (rename_tempfile(&refs->tempfile, refs->path)) {
 		strbuf_addf(err, "error replacing %s: %s",
 			    refs->path, strerror(errno));
-		goto out;
+		return -1;
 	}
 
-	ret = 0;
-	goto out;
+	return 0;
 
 error:
 	delete_tempfile(&refs->tempfile);
-
-out:
-	packed_refs_unlock(ref_store);
-	return ret;
+	return -1;
 }
 
 /*
@@ -705,6 +700,7 @@ int repack_without_refs(struct ref_store *ref_store,
 	struct ref_dir *packed;
 	struct string_list_item *refname;
 	int needs_repacking = 0, removed = 0;
+	int ret;
 
 	packed_assert_main_repository(refs, "repack_without_refs");
 	assert(err);
@@ -740,7 +736,9 @@ int repack_without_refs(struct ref_store *ref_store,
 	}
 
 	/* Write what remains */
-	return commit_packed_refs(&refs->base, err);
+	ret = commit_packed_refs(&refs->base, err);
+	packed_refs_unlock(ref_store);
+	return ret;
 }
 
 static int packed_init_db(struct ref_store *ref_store, struct strbuf *err)