blkcg: cosmetic updates to blkg_create()

* Rename out_* labels to err_*.

* Do ERR_PTR() conversion once in the error return path.

This patch is cosmetic and to prepare for the hierarchy support.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 2012754..18ae480 100644 (file)
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -187,16 +187,16 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg,
 
        /* blkg holds a reference to blkcg */
        if (!css_tryget(&blkcg->css)) {
-               blkg = ERR_PTR(-EINVAL);
-               goto out_free;
+               ret = -EINVAL;
+               goto err_free_blkg;
        }
 
        /* allocate */
        if (!new_blkg) {
                new_blkg = blkg_alloc(blkcg, q, GFP_ATOMIC);
                if (unlikely(!new_blkg)) {
-                       blkg = ERR_PTR(-ENOMEM);
-                       goto out_put;
+                       ret = -ENOMEM;
+                       goto err_put_css;
                }
        }
        blkg = new_blkg;
@@ -213,12 +213,11 @@ static struct blkcg_gq *blkg_create(struct blkcg *blkcg,
        if (!ret)
                return blkg;
 
-       blkg = ERR_PTR(ret);
-out_put:
+err_put_css:
        css_put(&blkcg->css);
-out_free:
+err_free_blkg:
        blkg_free(new_blkg);
-       return blkg;
+       return ERR_PTR(ret);
 }
 
 /**