linux-kernel - Re: [patch 12/39] genirq/msi: Add bus token to struct msi_domain

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Message-ID: <Y3Uim3pC3hy3HwH8@nvidia.com>
Date:   Wed, 16 Nov 2022 13:49:15 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Marc Zyngier <maz@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dave Jiang <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Ashok Raj <ashok.raj@...el.com>, Jon Mason <jdmason@...zu.us>,
        Allen Hubbe <allenbh@...il.com>,
        "Ahmed S. Darwish" <darwi@...utronix.de>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [patch 12/39] genirq/msi: Add bus token to struct msi_domain_info

On Fri, Nov 11, 2022 at 02:54:33PM +0100, Thomas Gleixner wrote:
> From: Ahmed S. Darwish <darwi@...utronix.de>
> 
> Add a bus token member to struct msi_domain_info and let
> msi_create_irq_domain() set the bus token.
> 
> That allows to remove the bus token updates at the call sites.
> 
> Suggested-by: Thomas Gleixner <tglx@...utronix.de>
> Signed-off-by: Ahmed S. Darwish <darwi@...utronix.de>
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> ---
>  include/linux/msi.h |   19 +++++++++++--------
>  kernel/irq/msi.c    |    7 +++++--
>  2 files changed, 16 insertions(+), 10 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

>  struct msi_domain_info {
> -	u32			flags;
> -	struct msi_domain_ops	*ops;
> -	struct irq_chip		*chip;
> -	void			*chip_data;
> -	irq_flow_handler_t	handler;
> -	void			*handler_data;
> -	const char		*handler_name;
> -	void			*data;
> +	u32				flags;
> +	enum irq_domain_bus_token	bus_token;
> +	struct msi_domain_ops		*ops;
> +	struct irq_chip			*chip;
> +	void				*chip_data;
> +	irq_flow_handler_t		handler;
> +	void				*handler_data;
> +	const char			*handler_name;
> +	void				*data;
>  };

This is why I've been frowning on horizontal alignment :(

Jason