PM / OPP: Support updating performance state of device's power domain

[mirror_ubuntu-bionic-kernel.git] / drivers / uwb / uwbd.c

diff --git a/drivers/uwb/uwbd.c b/drivers/uwb/uwbd.c
index 01c20a260a8b3f9d9a8ccc315d453f810eb3104c..39dd4ef53c77902db9f740ea3e88fd8bec5cb4ec 100644 (file)
--- a/drivers/uwb/uwbd.c
+++ b/drivers/uwb/uwbd.c
@@ -302,18 +302,22 @@ static int uwbd(void *param)
 /** Start the UWB daemon */
 void uwbd_start(struct uwb_rc *rc)
 {
-       rc->uwbd.task = kthread_run(uwbd, rc, "uwbd");
-       if (rc->uwbd.task == NULL)
+       struct task_struct *task = kthread_run(uwbd, rc, "uwbd");
+       if (IS_ERR(task)) {
+               rc->uwbd.task = NULL;
                printk(KERN_ERR "UWB: Cannot start management daemon; "
                       "UWB won't work\n");
-       else
+       } else {
+               rc->uwbd.task = task;
                rc->uwbd.pid = rc->uwbd.task->pid;
+       }
 }
 
 /* Stop the UWB daemon and free any unprocessed events */
 void uwbd_stop(struct uwb_rc *rc)
 {
-       kthread_stop(rc->uwbd.task);
+       if (rc->uwbd.task)
+               kthread_stop(rc->uwbd.task);
        uwbd_flush(rc);
 }