This patch is for Linux 4.19 with a RT patch.

The second 'if' block does not check notify for NULL,
this leads to a system crash.

Most likely, there is a typo here.

With old_notify system works as expected.

Signed-off-by: Ivan Safonov <insafo...@gmail.com>
---
 kernel/irq/manage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 290cd520dba1..79a7072dfb3c 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -412,7 +412,7 @@ irq_set_affinity_notifier(unsigned int irq, struct 
irq_affinity_notify *notify)
 
        if (old_notify) {
 #ifdef CONFIG_PREEMPT_RT_BASE
-               kthread_cancel_work_sync(&notify->work);
+               kthread_cancel_work_sync(&old_notify->work);
 #else
                cancel_work_sync(&old_notify->work);
 #endif
-- 
2.21.0

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