linux-kernel - Re: [PATCH v12 22/25] irqchip: Add RISC-V advanced PLIC driver for direct-mode

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Date: Fri, 16 Feb 2024 21:50:10 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Anup Patel <apatel@...tanamicro.com>, Palmer Dabbelt
 <palmer@...belt.com>, Paul Walmsley <paul.walmsley@...ive.com>, Rob
 Herring <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>, Frank Rowand
 <frowand.list@...il.com>, Conor Dooley <conor+dt@...nel.org>
Cc: Marc Zyngier <maz@...nel.org>, Björn Töpel
 <bjorn@...nel.org>, Atish
 Patra <atishp@...shpatra.org>, Andrew Jones <ajones@...tanamicro.com>,
 Sunil V L <sunilvl@...tanamicro.com>, Saravana Kannan
 <saravanak@...gle.com>, Anup Patel <anup@...infault.org>,
 linux-riscv@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, Anup Patel
 <apatel@...tanamicro.com>
Subject: Re: [PATCH v12 22/25] irqchip: Add RISC-V advanced PLIC driver for
 direct-mode

On Sat, Jan 27 2024 at 21:47, Anup Patel wrote:
> +static int aplic_direct_irqdomain_translate(struct irq_domain *d,
> +					 struct irq_fwspec *fwspec,
> +					 unsigned long *hwirq,
> +					 unsigned int *type)

Please align the arguments to the first argument of the first line and
use the 100 characters, i.e.

static int aplic_direct_irqdomain_translate(struct irq_domain *d, struct irq_fwspec *fwspec,
					    unsigned long *hwirq, unsigned int *type)
{

All over the place.

> +{
> +	struct aplic_priv *priv = d->host_data;
> +
> +	return aplic_irqdomain_translate(fwspec, priv->gsi_base,
> +					 hwirq, type);
> +}
> +
> +static int aplic_direct_irqdomain_alloc(struct irq_domain *domain,
> +				     unsigned int virq, unsigned int nr_irqs,
> +				     void *arg)
> +{
> +	int i, ret;
> +	unsigned int type;
> +	irq_hw_number_t hwirq;
> +	struct irq_fwspec *fwspec = arg;
> +	struct aplic_priv *priv = domain->host_data;
> +	struct aplic_direct *direct =
> +			container_of(priv, struct aplic_direct, priv);

Variable ordering. Please make this consistent according to documentation.

> +	ret = aplic_irqdomain_translate(fwspec, priv->gsi_base,
> +					&hwirq, &type);
> +	if (ret)
> +		return ret;
> +
> +	for (i = 0; i < nr_irqs; i++) {
> +		irq_domain_set_info(domain, virq + i, hwirq + i,
> +				    &aplic_direct_chip, priv,
> +				    handle_fasteoi_irq, NULL, NULL);
> +		irq_set_affinity(virq + i, &direct->lmask);
> +		/* See the reason described in aplic_msi_irqdomain_alloc() */

I still have to understand that "reason". :)

> +		irq_set_status_flags(virq + i, IRQ_DISABLE_UNLAZY);
> +	}

Thanks,

        tglx