Re: [PATCH kernel v4 2/8] genirq/irqdomain: Clean legacy IRQ allocation

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On 11/24/20 8:19 PM, Andy Shevchenko wrote:
On Tue, Nov 24, 2020 at 8:20 AM Alexey Kardashevskiy <aik@xxxxxxxxx> wrote:

There are 10 users of __irq_domain_alloc_irqs() and only one - IOAPIC -
passes realloc==true. There is no obvious reason for handling this
specific case in the generic code.

This splits out __irq_domain_alloc_irqs_data() to make it clear what
IOAPIC does and makes __irq_domain_alloc_irqs() cleaner.

This should cause no behavioral change.

+       ret = __irq_domain_alloc_irqs_data(domain, virq, nr_irqs, node, arg, affinity);
+       if (ret <= 0)
                 goto out_free_desc;

Was or wasn't 0 considered as error code previously?

Oh. I need to clean this up, the idea is since this does not allocate IRQs, this should return error code and not an irq, I'll make this explicit.


         return virq;

  out_free_desc:
         irq_free_descs(virq, nr_irqs);
         return ret;


--
Alexey



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