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Date:   Wed, 16 Nov 2022 10:14:52 -0600
From:   Bjorn Helgaas <helgaas@kernel.org>
To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     LKML <linux-kernel@vger.kernel.org>, x86@kernel.org,
        Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
        linux-pci@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Marc Zyngier <maz@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jason Gunthorpe <jgg@mellanox.com>,
        Dave Jiang <dave.jiang@intel.com>,
        Alex Williamson <alex.williamson@redhat.com>,
        Kevin Tian <kevin.tian@intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Logan Gunthorpe <logang@deltatee.com>,
        Ashok Raj <ashok.raj@intel.com>, Jon Mason <jdmason@kudzu.us>,
        Allen Hubbe <allenbh@gmail.com>,
        "Ahmed S. Darwish" <darwi@linutronix.de>,
        Reinette Chatre <reinette.chatre@intel.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        linuxppc-dev@lists.ozlabs.org
Subject: Re: [patch 13/39] PCI/MSI: Use msi_domain_info::bus_token
Message-ID: <20221116161452.GA1114659@bhelgaas>
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In-Reply-To: <20221111122014.352437595@linutronix.de>
Precedence: bulk

On Fri, Nov 11, 2022 at 02:54:35PM +0100, Thomas Gleixner wrote:
> From: Ahmed S. Darwish <darwi@linutronix.de>
> 
> Set the bus token in the msi_domain_info structure and let the core code
> handle the update.
> 
> Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Acked-by: Bjorn Helgaas <bhelgaas@google.com>

> ---
>  drivers/pci/msi/irqdomain.c |   11 +++--------
>  1 file changed, 3 insertions(+), 8 deletions(-)
> 
> --- a/drivers/pci/msi/irqdomain.c
> +++ b/drivers/pci/msi/irqdomain.c
> @@ -162,8 +162,6 @@ struct irq_domain *pci_msi_create_irq_do
>  					     struct msi_domain_info *info,
>  					     struct irq_domain *parent)
>  {
> -	struct irq_domain *domain;
> -
>  	if (WARN_ON(info->flags & MSI_FLAG_LEVEL_CAPABLE))
>  		info->flags &= ~MSI_FLAG_LEVEL_CAPABLE;
>  
> @@ -178,13 +176,10 @@ struct irq_domain *pci_msi_create_irq_do
>  
>  	/* PCI-MSI is oneshot-safe */
>  	info->chip->flags |= IRQCHIP_ONESHOT_SAFE;
> +	/* Let the core update the bus token */
> +	info->bus_token = DOMAIN_BUS_PCI_MSI;
>  
> -	domain = msi_create_irq_domain(fwnode, info, parent);
> -	if (!domain)
> -		return NULL;
> -
> -	irq_domain_update_bus_token(domain, DOMAIN_BUS_PCI_MSI);
> -	return domain;
> +	return msi_create_irq_domain(fwnode, info, parent);
>  }
>  EXPORT_SYMBOL_GPL(pci_msi_create_irq_domain);
>  
>