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https://github.com/Divested-Mobile/DivestOS-Build.git
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52 lines
1.5 KiB
Diff
52 lines
1.5 KiB
Diff
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From bbf26183b7a6236ba602f4d6a2f7cade35bba043 Mon Sep 17 00:00:00 2001
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From: Andrey Konovalov <andreyknvl@google.com>
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Date: Thu, 14 Sep 2017 14:30:55 +0200
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Subject: [PATCH] uwb: properly check kthread_run return value
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uwbd_start() calls kthread_run() and checks that the return value is
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not NULL. But the return value is not NULL in case kthread_run() fails,
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it takes the form of ERR_PTR(-EINTR).
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Use IS_ERR() instead.
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Also add a check to uwbd_stop().
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Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
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Cc: stable <stable@vger.kernel.org>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/uwb/uwbd.c | 12 ++++++++----
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1 file changed, 8 insertions(+), 4 deletions(-)
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diff --git a/drivers/uwb/uwbd.c b/drivers/uwb/uwbd.c
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index 01c20a260a8b3..39dd4ef53c779 100644
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--- a/drivers/uwb/uwbd.c
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+++ b/drivers/uwb/uwbd.c
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@@ -302,18 +302,22 @@ static int uwbd(void *param)
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/** Start the UWB daemon */
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void uwbd_start(struct uwb_rc *rc)
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{
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- rc->uwbd.task = kthread_run(uwbd, rc, "uwbd");
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- if (rc->uwbd.task == NULL)
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+ struct task_struct *task = kthread_run(uwbd, rc, "uwbd");
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+ if (IS_ERR(task)) {
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+ rc->uwbd.task = NULL;
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printk(KERN_ERR "UWB: Cannot start management daemon; "
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"UWB won't work\n");
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- else
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+ } else {
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+ rc->uwbd.task = task;
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rc->uwbd.pid = rc->uwbd.task->pid;
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+ }
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}
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/* Stop the UWB daemon and free any unprocessed events */
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void uwbd_stop(struct uwb_rc *rc)
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{
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- kthread_stop(rc->uwbd.task);
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+ if (rc->uwbd.task)
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+ kthread_stop(rc->uwbd.task);
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uwbd_flush(rc);
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}
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