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

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Message-ID: <4324EED5-187D-4113-B7F2-DBF45C42AFFD@flygoat.com>
Date:   Wed, 20 May 2020 19:51:38 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     Thomas Gleixner <tglx@...utronix.de>, maz@...nel.org
CC:     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



于 2020年5月13日 GMT+08:00 下午8:15:40, Thomas Gleixner <tglx@...utronix.de> 写到:
>Thomas Gleixner <tglx@...utronix.de> writes:
>> 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.
>
>Ooops. Wanted to reply to V3, but the comments are valid for V3 as well.

All fixed in v4.

Please review.

Thanks!


>
>Thanks,
>
>        tglx

-- 
Jiaxun Yang