Hi, s5p_mfc_probe[1] registers an interrupt handler s5p_mfc_irq before compete initialization. For example, the interrupt handler operates with mfc_ops, which are set up in [2]. So, potentially, the interrupt handler may be executed in parallel with initialization. The question is if the device can produce the interrupts. Its registers are initialized in [3] and there are nothing like "enabling interrupts". So, likely, they are activated. And if interrupts can come, then this is a data race. Best regards, Pavel Andrianov Linux Verification Center, ISPRAS web:http://linuxtesting.org [1]https://elixir.bootlin.com/linux/v5.4.106/source/drivers/media/platform/s5p-mfc/s5p_mfc.c#L1299 [2]https://elixir.bootlin.com/linux/v5.4.106/source/drivers/media/platform/s5p-mfc/s5p_mfc_opr.c#L19 [3]https://elixir.bootlin.com/linux/v5.4.106/source/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c#L2229
