linux-kernel - Re: [PATCH] irqchip/gic-v3-its: Avoid parsing _indirect

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Message-ID: <86pnrusl4u.wl-marc.zyngier@arm.com>
Date:   Thu, 14 Feb 2019 10:46:25 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     Zenghui Yu <yuzenghui@...wei.com>
Cc:     <tglx@...utronix.de>, <jason@...edaemon.net>,
        <shankerd@...eaurora.org>, <wanghaibin.wang@...wei.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] irqchip/gic-v3-its: Avoid parsing _indirect_ twice for Device table

On Sun, 10 Feb 2019 05:24:10 +0000,
Zenghui Yu <yuzenghui@...wei.com> wrote:
> 
> In current logic, its_parse_indirect_baser() will be invoked twice
> when allocating Device tables. Add a *break* to omit the unnecessary
> and annoying (might be ...) invoking.
> 
> Signed-off-by: Zenghui Yu <yuzenghui@...wei.com>
> ---
>  drivers/irqchip/irq-gic-v3-its.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
> index db20e99..9f529a6 100644
> --- a/drivers/irqchip/irq-gic-v3-its.c
> +++ b/drivers/irqchip/irq-gic-v3-its.c
> @@ -1946,6 +1946,8 @@ static int its_alloc_tables(struct its_node *its)
>  			indirect = its_parse_indirect_baser(its, baser,
>  							    psz, &order,
>  							    its->device_ids);
> +			break;
> +
>  		case GITS_BASER_TYPE_VCPU:
>  			indirect = its_parse_indirect_baser(its, baser,
>  							    psz, &order,

Nice catch. I've applied this to irqchip-next with the Fixes tag and a
Cc stable.

Thanks,

	M.

-- 
Jazz is not dead, it just smell funny.