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

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Message-ID: <18c972e9-5230-4a0c-3fbf-e3c6c224d6fc@huawei.com>
Date:   Tue, 12 Feb 2019 21:17:22 +0800
From:   Zenghui Yu <yuzenghui@...wei.com>
To:     <marc.zyngier@....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

Hi Marc,

On 2019/2/10 13:24, Zenghui Yu 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.
> 

Forgot to add:

Fixes: 32bd44dc19de ("irqchip/gic-v3-its: Fix the incorrect parsing of 
VCPU table size")

> 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,
> 

Thanks,
Zenghui