virtio-blk: remove dead variable in virtio_blk_handle_scsi

As pointed out by clang size is only ever written to, but never actually used.

Signed-off-by Christoph Hellwig<[email protected]>

Index: qemu/hw/virtio-blk.c
===================================================================

hw/virtio-blk.c +1 -4

@@ -165,7 +165,7 @@ static VirtIOBlockReq *virtio_blk_get_re
  static void virtio_blk_handle_scsi(VirtIOBlockReq *req)
  {
      struct sg_io_hdr hdr;
-    int ret, size = 0;
+    int ret;
      int status;
      int i;
 

@@ -194,7 +194,6 @@ static void virtio_blk_handle_scsi(VirtI
       * before the regular inhdr.
       */
      req->scsi = (void *)req->elem.in_sg[req->elem.in_num - 2].iov_base;
-    size = sizeof(*req->in) + sizeof(*req->scsi);
 
      memset(&hdr, 0, sizeof(struct sg_io_hdr));
      hdr.interface_id = 'S';

@@ -226,7 +225,6 @@ static void virtio_blk_handle_scsi(VirtI
              hdr.dxfer_len += req->elem.in_sg[i].iov_len;
 
          hdr.dxferp = req->elem.in_sg;
-        size += hdr.dxfer_len;
      } else {
          /*
           * Some SCSI commands don't actually transfer any data.

@@ -236,7 +234,6 @@ static void virtio_blk_handle_scsi(VirtI
 
      hdr.sbp = req->elem.in_sg[req->elem.in_num - 3].iov_base;
      hdr.mx_sb_len = req->elem.in_sg[req->elem.in_num - 3].iov_len;
-    size += hdr.mx_sb_len;
 
      ret = bdrv_ioctl(req->dev->bs, SG_IO,&hdr);
      if (ret) {