[RFC PATCH 21/25] virtio-snd: Replaced goto with if else

[Shreyansh Chouhan <chouhan.shreyansh2702@gmail.com>]

Removed goto from the ctrl vq handler and added an if else
branch for error handling.

Signed-off-by: Shreyansh Chouhan <chouhan.shreyansh2702@gmail.com>
---
 hw/audio/virtio-snd.c | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/hw/audio/virtio-snd.c b/hw/audio/virtio-snd.c
index 7b80a92737..cb83db0e89 100644
--- a/hw/audio/virtio-snd.c
+++ b/hw/audio/virtio-snd.c
@@ -947,7 +947,7 @@ static uint32_t virtio_snd_handle_pcm_release(VirtIOSound *s,
 static void virtio_snd_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
 {
     VirtIOSound *s = VIRTIO_SOUND(vdev);
-    virtio_snd_hdr ctrl;
+    virtio_snd_hdr ctrl, resp;
 
     VirtQueueElement *elem = NULL;
     size_t sz;
@@ -959,7 +959,7 @@ static void virtio_snd_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
         if (!elem) {
             break;
         }
-        if (iov_size(elem->in_sg, elem->in_num) < sizeof(ctrl) ||
+        if (iov_size(elem->in_sg, elem->in_num) < sizeof(resp) ||
                 iov_size(elem->out_sg, elem->out_num) < sizeof(ctrl)) {
             virtio_snd_err("virtio-snd ctrl missing headers\n");
             virtqueue_detach_element(vq, elem, 0);
@@ -975,41 +975,36 @@ static void virtio_snd_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
         if (sz != sizeof(ctrl)) {
             /* error */
             virtio_snd_err("virtio snd ctrl could not read header\n");
+            resp.code = VIRTIO_SND_S_BAD_MSG;
         } else if (ctrl.code == VIRTIO_SND_R_JACK_INFO) {
             sz = virtio_snd_handle_jack_info(s, elem);
-            goto done;
         } else if (ctrl.code == VIRTIO_SND_R_JACK_REMAP) {
             sz = virtio_snd_handle_jack_remap(s, elem);
-            goto done;
         } else if (ctrl.code == VIRTIO_SND_R_PCM_INFO) {
             sz = virtio_snd_handle_pcm_info(s, elem);
-            goto done;
         } else if (ctrl.code == VIRTIO_SND_R_PCM_SET_PARAMS) {
             sz = virtio_snd_handle_pcm_set_params(s, elem);
-            goto done;
         } else if (ctrl.code == VIRTIO_SND_R_PCM_PREPARE) {
             sz = virtio_snd_handle_pcm_prepare(s, elem);
-            goto done;
         } else if (ctrl.code == VIRTIO_SND_R_PCM_START) {
             sz = virtio_snd_handle_pcm_start_stop(s, elem, true);
-            goto done;
         } else if (ctrl.code == VIRTIO_SND_R_PCM_STOP) {
             sz = virtio_snd_handle_pcm_start_stop(s, elem, false);
         } else if (ctrl.code == VIRTIO_SND_R_PCM_RELEASE) {
             sz = virtio_snd_handle_pcm_release(s, elem);
         } else if (ctrl.code == VIRTIO_SND_R_CHMAP_INFO) {
             virtio_snd_log("VIRTIO_SND_R_CHMAP_INFO");
-            goto done;
         } else {
             /* error */
             virtio_snd_err("virtio snd header not recognized: %d\n", ctrl.code);
+            resp.code = VIRTIO_SND_S_BAD_MSG;
         }
 
-        virtio_snd_hdr resp;
-        resp.code = VIRTIO_SND_S_OK;
-        sz = iov_from_buf(elem->in_sg, elem->in_num, 0, &resp, sizeof(resp));
+        if (resp.code == VIRTIO_SND_S_BAD_MSG) {
+            sz = iov_from_buf(elem->in_sg, elem->in_num, 0, &resp,
+                              sizeof(resp));
+        }
 
-done:
         virtqueue_push(vq, elem, sz);
         virtio_notify(vdev, vq);
         g_free(iov2);
-- 
2.31.1