vhost/scsi: Improve a size determination in four functions

Replace the specification of four data structures by pointer dereferences
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index 71517b3..1e321e9 100644 (file)
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -586,8 +586,7 @@ vhost_scsi_get_tag(struct vhost_virtqueue *vq, struct vhost_scsi_tpg *tpg,
        sg = cmd->tvc_sgl;
        prot_sg = cmd->tvc_prot_sgl;
        pages = cmd->tvc_upages;
-       memset(cmd, 0, sizeof(struct vhost_scsi_cmd));
-
+       memset(cmd, 0, sizeof(*cmd));
        cmd->tvc_sgl = sg;
        cmd->tvc_prot_sgl = prot_sg;
        cmd->tvc_upages = pages;
@@ -1725,7 +1724,7 @@ static int vhost_scsi_make_nexus(struct vhost_scsi_tpg *tpg,
                return -EEXIST;
        }
 
-       tv_nexus = kzalloc(sizeof(struct vhost_scsi_nexus), GFP_KERNEL);
+       tv_nexus = kzalloc(sizeof(*tv_nexus), GFP_KERNEL);
        if (!tv_nexus) {
                mutex_unlock(&tpg->tv_tpg_mutex);
                pr_err("Unable to allocate struct vhost_scsi_nexus\n");
@@ -1926,7 +1925,7 @@ vhost_scsi_make_tpg(struct se_wwn *wwn,
        if (kstrtou16(name + 5, 10, &tpgt) || tpgt >= VHOST_SCSI_MAX_TARGET)
                return ERR_PTR(-EINVAL);
 
-       tpg = kzalloc(sizeof(struct vhost_scsi_tpg), GFP_KERNEL);
+       tpg = kzalloc(sizeof(*tpg), GFP_KERNEL);
        if (!tpg) {
                pr_err("Unable to allocate struct vhost_scsi_tpg");
                return ERR_PTR(-ENOMEM);
@@ -1980,7 +1979,7 @@ vhost_scsi_make_tport(struct target_fabric_configfs *tf,
        /* if (vhost_scsi_parse_wwn(name, &wwpn, 1) < 0)
                return ERR_PTR(-EINVAL); */
 
-       tport = kzalloc(sizeof(struct vhost_scsi_tport), GFP_KERNEL);
+       tport = kzalloc(sizeof(*tport), GFP_KERNEL);
        if (!tport) {
                pr_err("Unable to allocate struct vhost_scsi_tport");
                return ERR_PTR(-ENOMEM);