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

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Date:   Wed, 26 Aug 2020 22:33:31 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
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, 26 Aug 2020 20:47:38 +0100,
Thomas Gleixner <tglx@...utronix.de> wrote:
> 
> 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.

I can't read. Time to put the laptop away!

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.