Re: [PATCH 2/4] PCI: j721e: Add PCI legacy interrupt support for J721E

From: Bjorn Helgaas <helgaas@kernel.org>
To: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	Rob Herring <robh+dt@kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Marc Zyngier <maz@kernel.org>, Tom Joseph <tjoseph@cadence.com>,
	linux-omap@vger.kernel.org, linux-pci@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Lokesh Vutla <lokeshvutla@ti.com>
Subject: Re: [PATCH 2/4] PCI: j721e: Add PCI legacy interrupt support for J721E
Date: Thu, 25 Mar 2021 15:41:10 -0500	[thread overview]
Message-ID: <20210325204110.GA809665@bjorn-Precision-5520> (raw)
In-Reply-To: <20210325090936.9306-3-kishon@ti.com>

I'd promote J721E earlier in subject so it doesn't get truncated, e.g.,

  PCI: j721e: Add J721E PCI legacy interrupt support

On Thu, Mar 25, 2021 at 02:39:34PM +0530, Kishon Vijay Abraham I wrote:

> +static void j721e_pcie_legacy_irq_handler(struct irq_desc *desc)
> +{
> +	int i;
> +	u32 reg;
> +	int virq;
> +	struct j721e_pcie *pcie = irq_desc_get_handler_data(desc);
> +	struct irq_chip *chip = irq_desc_get_chip(desc);

The rest of this driver sorts locals in order of use, e.g.,

	struct j721e_pcie *pcie = irq_desc_get_handler_data(desc);
	struct irq_chip *chip = irq_desc_get_chip(desc);
	int i;
	u32 reg;
	int virq;

> +	chained_irq_enter(chip, desc);
> +
> +	for (i = 0; i < PCI_NUM_INTX; i++) {
> +		reg = j721e_pcie_intd_readl(pcie, STATUS_REG_SYS_0);
> +		if (!(reg & INTx_EN(i)))
> +			continue;
> +
> +	virq = irq_find_mapping(pcie->legacy_irq_domain, 3 - i);

Whitespace error (should be indented another tab, I think).

> +		generic_handle_irq(virq);
> +		j721e_pcie_intd_writel(pcie, STATUS_CLR_REG_SYS_0, INTx_EN(i));
> +		j721e_pcie_intd_writel(pcie, EOI_REG, 3 - i);
> +	}
> +
> +	chained_irq_exit(chip, desc);
> +}