linux-kernel - Re: [RFC PATCH 20/33] irqchip/gic-v3-its: Add VPE domain infrastructure

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Date:   Mon, 13 Feb 2017 11:40:56 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Marc Zyngier <marc.zyngier@....com>
cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Jason Cooper <jason@...edaemon.net>,
        Eric Auger <eric.auger@...hat.com>
Subject: Re: [RFC PATCH 20/33] irqchip/gic-v3-its: Add VPE domain
 infrastructure

On Tue, 17 Jan 2017, Marc Zyngier wrote:
> @@ -2266,6 +2294,8 @@ int __init its_init(struct fwnode_handle *handle, struct rdists *rdists,
>  		    struct irq_domain *parent_domain)
>  {
>  	struct device_node *of_node;
> +	struct its_node *its;
> +	bool has_v4 = false;
>  
>  	its_parent = parent_domain;
>  	of_node = to_of_node(handle);
> @@ -2283,5 +2313,11 @@ int __init its_init(struct fwnode_handle *handle, struct rdists *rdists,
>  	its_alloc_lpi_tables();
>  	its_lpi_init(rdists->id_bits);
>  
> +	list_for_each_entry(its, &its_nodes, entry)
> +		has_v4 |= its->is_v4;

Hmm, can you have mixed version its nodes? If not, you probably should have
some sanity check (not necessarily here). If yes, then how does that work?

Thanks,

	tglx