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cgroup: fix error return value from cgroup_subtree_control()

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While refactoring, f7b2814bb9 ("cgroup: factor out
cgroup_{apply|finalize}_control() from
cgroup_subtree_control_write()") broke error return value from the
function.  The return value from the last operation is always
overridden to zero.  Fix it.

Signed-off-by: Tejun Heo <[email protected]>
Cc: [email protected] # v4.6+
Signed-off-by: Tejun Heo <[email protected]>
This commit is contained in:
Tejun Heo 2017-07-23 08:14:15 -04:00
commit 3c74541777
1 changed files with 2 additions and 2 deletions
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4
kernel/cgroup/cgroup.c
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@ -3001,11 +3001,11 @@ static ssize_t cgroup_subtree_control_write(struct kernfs_open_file *of,
cgrp->subtree_control &= ~disable;
ret = cgroup_apply_control(cgrp);
cgroup_finalize_control(cgrp, ret);
if (ret)
goto out_unlock;
kernfs_activate(cgrp->kn);
ret = 0;
out_unlock:
cgroup_kn_unlock(of->kn);
return ret ?: nbytes;