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authorPan Bian <bianpan2016@163.com>2016-12-03 18:02:27 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-12-06 04:24:14 +0300
commit8f6040cebd2382a5cfb201419d40e7a4a193a412 (patch)
tree66bb6d61a0eae69f10ff0ce30bde5054957ef078 /drivers/cpuidle/sysfs.c
parentfb1013a01673acf7e94e38cda169828ac76b345a (diff)
downloadlinux-8f6040cebd2382a5cfb201419d40e7a4a193a412.tar.xz
cpuidle: fix improper return value on error
In function cpuidle_add_state_sysfs(), variable ret takes the return value. Its value should be negative on errors. Because ret is reset in the loop, its value will be 0 during the second and after repeat of the loop. If kzalloc() returns a NULL pointer then, it will return 0. It may be better to explicitly assign "-ENOMEM" when the call to kzalloc() fails. Link: https://bugzilla.kernel.org/show_bug.cgi?id=188901 Signed-off-by: Pan Bian <bianpan2016@163.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpuidle/sysfs.c')
-rw-r--r--drivers/cpuidle/sysfs.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index 832a2c3f01ff..c5adc8c9ac43 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -403,8 +403,10 @@ static int cpuidle_add_state_sysfs(struct cpuidle_device *device)
/* state statistics */
for (i = 0; i < drv->state_count; i++) {
kobj = kzalloc(sizeof(struct cpuidle_state_kobj), GFP_KERNEL);
- if (!kobj)
+ if (!kobj) {
+ ret = -ENOMEM;
goto error_state;
+ }
kobj->state = &drv->states[i];
kobj->state_usage = &device->states_usage[i];
init_completion(&kobj->kobj_unregister);