diff options
| author | Andrey Konovalov <andreyknvl@google.com> | 2017-09-14 15:30:55 +0300 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2018-01-01 23:50:49 +0300 |
| commit | c95d921ebf9e02853bd090f3b3845085082185f8 (patch) | |
| tree | daa1fcd175391b0177c216b670027ef51ef38f42 /drivers/uwb/uwbd.c | |
| parent | 82ff3c87e407b2497ae55c7802288759d0a864c6 (diff) | |
| download | linux-c95d921ebf9e02853bd090f3b3845085082185f8.tar.xz | |
uwb: properly check kthread_run return value
commit bbf26183b7a6236ba602f4d6a2f7cade35bba043 upstream.
uwbd_start() calls kthread_run() and checks that the return value is
not NULL. But the return value is not NULL in case kthread_run() fails,
it takes the form of ERR_PTR(-EINTR).
Use IS_ERR() instead.
Also add a check to uwbd_stop().
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/uwb/uwbd.c')
| -rw-r--r-- | drivers/uwb/uwbd.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/uwb/uwbd.c b/drivers/uwb/uwbd.c index bdcb13cc1d54..5c9828370217 100644 --- a/drivers/uwb/uwbd.c +++ b/drivers/uwb/uwbd.c @@ -303,18 +303,22 @@ 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); } |