media: intel/ipu6: do not handle interrupts when device is disabled

Some IPU6 devices have shared interrupts. We need to handle properly
case when interrupt is triggered from other device on shared irq line
and IPU6 itself disabled. In such case we get 0xffffffff from
ISR_STATUS register and handle all irq's cases, for what we are not
not prepared and usually hang the whole system.

To avoid the issue use pm_runtime_get_if_active() to check if
the device is enabled and prevent suspending it when we handle irq
until the end of irq. Additionally use synchronize_irq() in suspend

Fixes: ab29a2478e70 ("media: intel/ipu6: add IPU6 buttress interface driver")
Cc: [email protected]
Signed-off-by: Stanislaw Gruszka <[email protected]>
Reviewed-by: Hans de Goede <[email protected]>
Tested-by: Hans de Goede <[email protected]> # ThinkPad X1 Yoga Gen 8, ov2740
Signed-off-by: Sakari Ailus <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>

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