In some part the problem here is that Rust is making error handling explicit, while the C driver has all those error handling covered in other files. For examp

In some part the problem here is that Rust is making error handling explicit, while the C driver has all those error handling covered in other files. For example, in the C version: struct pl061 *pl061 = gpiochip_get_data(gc); What happens if there's no chip? you should have a NULL check, but it's omitted because error handling is done outside of this file. The same is true for the additional if statement on the IRQ. In the end is a side effect of this being an example, because it should be possible to refactor the code where error handling is simply done through the ? operator. IMO that's a better way to do it than the C alternative, because right now there's no way to know if those struct pointers have proper error handling or not without leaving this file and hunting for each struct and function.