Use interfaceDescriptor instead of interfaceChain

wherever suits. Sementically, interfaceDescriptor
returns the first element of interfaceChain; use
interfaceDescriptor when the rest of the elements
aren't used.

Bug: 34136228

Test: pass
Change-Id: Icc78e7e9b17b7c51c705c20d51c2fbac5b1c5dd7

1 files changed, 2 insertions, 5 deletions

diff --git a/bootctl/bootctl.cpp b/bootctl/bootctl.cpp
index 6dda28fb..d80bb158 100644
--- a/bootctl/bootctl.cpp
+++ b/bootctl/bootctl.cpp
@@ -52,13 +52,10 @@ static void usage(FILE* where, int /* argc */, char* argv[])
 }
 
 static int do_hal_info(const sp<IBootControl> module) {
-    module->interfaceChain([&](const auto& chain) {
-        if (chain.size() == 0) {
-            return; // error, can't dump info
-        }
+    module->interfaceDescriptor([&](const auto& descriptor) {
         fprintf(stdout,
                 "HAL Version: %s\n",
-                chain[0].c_str());
+                descriptor.c_str());
     });
     return EX_OK;
 }