Re: [PATCH] virtio-blk: do not use C99 mixed declarations

[Michael S. Tsirkin]

On Tue, Feb 06, 2024 at 09:04:09AM -0500, Stefan Hajnoczi wrote:
> QEMU's coding style generally forbids C99 mixed declarations.
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Acked-by: Michael S. Tsirkin <mst@redhat.com>

or maybe it's time we moved on?

> ---
>  hw/block/virtio-blk.c | 25 ++++++++++++++-----------
>  1 file changed, 14 insertions(+), 11 deletions(-)
> 
> diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
> index 227d83569f..f6009cd9b3 100644
> --- a/hw/block/virtio-blk.c
> +++ b/hw/block/virtio-blk.c
> @@ -661,16 +661,16 @@ static void virtio_blk_zone_report_complete(void 
> *opaque, int ret)
>      int64_t zrp_size, n, j = 0;
>      int64_t nz = data->zone_report_data.nr_zones;
>      int8_t err_status = VIRTIO_BLK_S_OK;
> -
> -    trace_virtio_blk_zone_report_complete(vdev, req, nz, ret);
> -    if (ret) {
> -        err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD;
> -        goto out;
> -    }
> -
>      struct virtio_blk_zone_report zrp_hdr = (struct virtio_blk_zone_report) {
>          .nr_zones = cpu_to_le64(nz),
>      };
> +
> +    trace_virtio_blk_zone_report_complete(vdev, req, nz, ret);
> +    if (ret) {
> +        err_status = VIRTIO_BLK_S_ZONE_INVALID_CMD;
> +        goto out;
> +    }
> +
>      zrp_size = sizeof(struct virtio_blk_zone_report)
>                 + sizeof(struct virtio_blk_zone_descriptor) * nz;
>      n = iov_from_buf(in_iov, in_num, 0, &zrp_hdr, sizeof(zrp_hdr));
> @@ -898,13 +898,14 @@ static int virtio_blk_handle_zone_append(VirtIOBlockReq 
> *req,
>  
>      int64_t offset = virtio_ldq_p(vdev, &req->out.sector) << 
> BDRV_SECTOR_BITS;
>      int64_t len = iov_size(out_iov, out_num);
> +    ZoneCmdData *data;
>  
>      trace_virtio_blk_handle_zone_append(vdev, req, offset >> 
> BDRV_SECTOR_BITS);
>      if (!check_zoned_request(s, offset, len, true, &err_status)) {
>          goto out;
>      }
>  
> -    ZoneCmdData *data = g_malloc(sizeof(ZoneCmdData));
> +    data = g_malloc(sizeof(ZoneCmdData));
>      data->req = req;
>      data->in_iov = in_iov;
>      data->in_num = in_num;
> @@ -1191,14 +1192,15 @@ static void virtio_blk_dma_restart_cb(void *opaque, 
> bool running,
>  {
>      VirtIOBlock *s = opaque;
>      uint16_t num_queues = s->conf.num_queues;
> +    g_autofree VirtIOBlockReq **vq_rq = NULL;
> +    VirtIOBlockReq *rq;
>  
>      if (!running) {
>          return;
>      }
>  
>      /* Split the device-wide s->rq request list into per-vq request lists */
> -    g_autofree VirtIOBlockReq **vq_rq = g_new0(VirtIOBlockReq *, num_queues);
> -    VirtIOBlockReq *rq;
> +    vq_rq = g_new0(VirtIOBlockReq *, num_queues);
>  
>      WITH_QEMU_LOCK_GUARD(&s->rq_lock) {
>          rq = s->rq;
> @@ -1924,6 +1926,7 @@ static void virtio_blk_device_realize(DeviceState *dev, 
> Error **errp)
>      VirtIODevice *vdev = VIRTIO_DEVICE(dev);
>      VirtIOBlock *s = VIRTIO_BLK(dev);
>      VirtIOBlkConf *conf = &s->conf;
> +    BlockDriverState *bs;
>      Error *err = NULL;
>      unsigned i;
>  
> @@ -1969,7 +1972,7 @@ static void virtio_blk_device_realize(DeviceState *dev, 
> Error **errp)
>          return;
>      }
>  
> -    BlockDriverState *bs = blk_bs(conf->conf.blk);
> +    bs = blk_bs(conf->conf.blk);
>      if (bs->bl.zoned != BLK_Z_NONE) {
>          virtio_add_feature(&s->host_features, VIRTIO_BLK_F_ZONED);
>          if (bs->bl.zoned == BLK_Z_HM) {
> -- 
> 2.43.0