linux-kernel - Re: [PATCH v2 5/6] irqchip: Add Loongson PCH MSI controller

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Message-ID: <874ksk3uda.fsf@nanos.tec.linutronix.de>
Date:   Wed, 13 May 2020 14:13:53 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Jiaxun Yang <jiaxun.yang@...goat.com>, maz@...nel.org
Cc:     Jiaxun Yang <jiaxun.yang@...goat.com>,
        Jason Cooper <jason@...edaemon.net>,
        Rob Herring <robh+dt@...nel.org>,
        Huacai Chen <chenhc@...ote.com>, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-mips@...r.kernel.org
Subject: Re: [PATCH v2 5/6] irqchip: Add Loongson PCH MSI controller

Jiaxun Yang <jiaxun.yang@...goat.com> writes:
> +
> +struct pch_msi_data {
> +	spinlock_t		msi_map_lock;
> +	phys_addr_t		doorbell;
> +	u32			irq_first;	/* The vector number that MSIs starts */
> +	u32			num_irqs;	/* The number of vectors for MSIs */
> +	unsigned long		*msi_map;
> +};
> +
> +static void pch_msi_mask_msi_irq(struct irq_data *d)
> +{
> +	pci_msi_mask_irq(d);
> +	irq_chip_mask_parent(d);
> +}
> +
> +static void pch_msi_unmask_msi_irq(struct irq_data *d)
> +{
> +	pci_msi_unmask_irq(d);
> +	irq_chip_unmask_parent(d);

The ordering of mask and unmask is assymetric. That does not make sense.

> +static struct msi_domain_info pch_msi_domain_info = {
> +	.flags		= MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
> +			  MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX,
> +	.chip	= &pch_msi_irq_chip,

Please maintain tabular layout.

Thanks,

        tglx