Hello, Is it ok to use wait_for_completion in a workqueue? static void my_work(struct work_struct *work) { while (true) { wait_for_completion(completion); // Do something here reinit_completion(completion); enable_irq(irq); } } static irqreturn_t my_irq_handler(int irq, void *dev) { disable_irq(irq); complete(completion); return IRQ_HANDLED; } Something like the above is what I have. Is it a correct way to do things or complete idiotic brainfart. Workqueues can sleep so I thought of the above code, but, was not sure. And I am not using _interruptible or _interruptible_timeout because I absolutely want it to wait for the IRQ. Now as such though this works I get stack traces with hung task complaining and I have to set /proc/sys/kernel/hung_task_timeout_secs to 0. And were the IRQ not generated I do get NMI watchdog hang. I will accept I have only little knowledge of these things. Regards, Victor.