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authorLi Zefan <lizefan@huawei.com>2013-08-13 10:05:59 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-08-20 08:43:05 -0700
commit9fa6018620ff121a3d892394021d4285636b7cd5 (patch)
tree31b7a35aa9d76b72aeeb4ed841a9d2986b6e7b5a
parent94aa327e13898c4c495a27303ce96cc52280fb25 (diff)
cpuset: fix the return value of cpuset_write_u64()
commit a903f0865a190f8778c73df1a810ea6e25e5d7cf upstream. Writing to this file always returns -ENODEV: # echo 1 > cpuset.memory_pressure_enabled -bash: echo: write error: No such device Signed-off-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--kernel/cpuset.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 64b3f791bbe5..6948e9476b42 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1502,11 +1502,13 @@ static int cpuset_write_u64(struct cgroup *cgrp, struct cftype *cft, u64 val)
{
struct cpuset *cs = cgroup_cs(cgrp);
cpuset_filetype_t type = cft->private;
- int retval = -ENODEV;
+ int retval = 0;
mutex_lock(&cpuset_mutex);
- if (!is_cpuset_online(cs))
+ if (!is_cpuset_online(cs)) {
+ retval = -ENODEV;
goto out_unlock;
+ }
switch (type) {
case FILE_CPU_EXCLUSIVE: