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

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Date:   Tue, 24 Nov 2020 11:19:05 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Alexey Kardashevskiy <aik@...abs.ru>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Cédric Le Goater <clg@...d.org>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Michal Suchánek <msuchanek@...e.de>,
        "Oliver O'Halloran" <oohall@...il.com>,
        Marc Zyngier <maz@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        "open list:LINUX FOR POWERPC PA SEMI PWRFICIENT" 
        <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH kernel v4 2/8] genirq/irqdomain: Clean legacy IRQ allocation

On Tue, Nov 24, 2020 at 8:20 AM Alexey Kardashevskiy <aik@...abs.ru> 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?

>         return virq;

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

-- 
With Best Regards,
Andy Shevchenko