linux-kernel - Re: [patch V2 29/46] irqdomain/msi: Allow to override msi_domain_alloc/free

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Message-ID: <87zh6htcit.fsf@nanos.tec.linutronix.de>
Date:   Wed, 26 Aug 2020 21:47:38 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Marc Zyngier <maz@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org, linux-hyperv@...r.kernel.org,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Jon Derrick <jonathan.derrick@...el.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Wei Liu <wei.liu@...nel.org>,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Steve Wahl <steve.wahl@....com>,
        Dimitri Sivanich <sivanich@....com>,
        Russ Anderson <rja@....com>, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        xen-devel@...ts.xenproject.org, Juergen Gross <jgross@...e.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Megha Dey <megha.dey@...el.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jacob Pan <jacob.jun.pan@...el.com>,
        Baolu Lu <baolu.lu@...el.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>
Subject: Re: [patch V2 29/46] irqdomain/msi: Allow to override msi_domain_alloc/free_irqs()

On Wed, Aug 26 2020 at 20:06, Marc Zyngier wrote:
> On Wed, 26 Aug 2020 12:16:57 +0100,
> Thomas Gleixner <tglx@...utronix.de> wrote:
>>  /**
>> - * msi_domain_free_irqs - Free interrupts from a MSI interrupt @domain associated tp @dev
>> - * @domain:	The domain to managing the interrupts
>> + * msi_domain_alloc_irqs - Allocate interrupts from a MSI interrupt domain
>> + * @domain:	The domain to allocate from
>>   * @dev:	Pointer to device struct of the device for which the interrupts
>> - *		are free
>> + *		are allocated
>> + * @nvec:	The number of interrupts to allocate
>> + *
>> + * Returns 0 on success or an error code.
>>   */
>> -void msi_domain_free_irqs(struct irq_domain *domain, struct device *dev)
>> +int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
>> +			  int nvec)
>> +{
>> +	struct msi_domain_info *info = domain->host_data;
>> +	struct msi_domain_ops *ops = info->ops;
>
> Rework leftovers, I imagine.

Hmm, no. How would it call ops->domain_alloc_irqs() without getting the
ops. I know, that the diff is horrible, but don't blame me for it. diff
sucks at times.

>> +
>> +	return ops->domain_alloc_irqs(domain, dev, nvec);
>> +}
>> +
>> +void __msi_domain_free_irqs(struct irq_domain *domain, struct device *dev)
>>  {
>>  	struct msi_desc *desc;
>>  
>> @@ -513,6 +525,20 @@ void msi_domain_free_irqs(struct irq_dom
>>  }
>>  
>>  /**
>> + * __msi_domain_free_irqs - Free interrupts from a MSI interrupt @domain associated tp @dev
>
> Spurious __.

Yup.

Thanks,

        tglx