tools/virtio: virtio_test -h,--help should return directly

When we get help information, we should return directly, and we should not
execute test cases. Move the exit() directly into the help() function and
remove it from case '?'.

Signed-off-by: Rong Tao <rongtao@cestc.cn>
Message-Id: <tencent_822CEBEB925205EA1573541CD1C2604F4805@qq.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
index 280c6f8..028f54e 100644 (file)
--- a/tools/virtio/virtio_test.c
+++ b/tools/virtio/virtio_test.c
@@ -327,7 +327,7 @@ const struct option longopts[] = {
        }
 };
 
-static void help(void)
+static void help(int status)
 {
        fprintf(stderr, "Usage: virtio_test [--help]"
                " [--no-indirect]"
@@ -337,6 +337,8 @@ static void help(void)
                " [--batch=random/N]"
                " [--reset=N]"
                "\n");
+
+       exit(status);
 }
 
 int main(int argc, char **argv)
@@ -354,14 +356,12 @@ int main(int argc, char **argv)
                case -1:
                        goto done;
                case '?':
-                       help();
-                       exit(2);
+                       help(2);
                case 'e':
                        features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
                        break;
                case 'h':
-                       help();
-                       goto done;
+                       help(0);
                case 'i':
                        features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
                        break;