alt_irq_disable_all() not allowed in isr

Interrupts and getting them right is a harder problem than it seems at first. In general, if you have a lot going on in a device driver interrupt routine you are doing it wrong.

Some rules I follow: Make ISRs as small as possible. More than 10-20 lines is probably too big. Never disable interrupts within an interrupt routine. If you think you need to your interrupt priorities are probably wrong. Don't use coroutines in an ISR. Don't loop in an ISR. Never modify the same thing in both an ISR and in your main code, I.E. no linked lists. Never modify something in more than one ISR.

If you follow these rules, you will have a much easier time of it. Some old school devs do way too much in interrupt routines. Their code always has weird infrequent and hard to track down bugs in it.