cpuset: fix missing error return in update_cpumask

The commit c6366739804f ("cpuset: refactor cpus_allowed_validate_change")
inadvertently removed the error return when cpus_allowed_validate_change()
fails. This patch restores the proper error handling by returning retval
when the validation check fails.

Fixes: c6366739804f ("cpuset: refactor cpus_allowed_validate_change")
Signed-off-by: Chen Ridong <chenridong@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 44d65890326a66603dd1b664ea7691c410c1eb29..535174ed712682f52531bd5c11ccff947c735c95 100644 (file)
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2515,7 +2515,8 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
        compute_trialcs_excpus(trialcs, cs);
        trialcs->prs_err = PERR_NONE;
 
-       if (cpus_allowed_validate_change(cs, trialcs, &tmp) < 0)
+       retval = cpus_allowed_validate_change(cs, trialcs, &tmp);
+       if (retval < 0)
                goto out_free;
 
        /*