linux-kernel - Re: [Linuxarm] [PATCH v1 0/2] irqchip/gic-v3-its: don't set bitmap for LPI which user didn't allocate

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Message-ID: <ea730f9b-c635-317d-c70d-4057590b1d1a@huawei.com>
Date:   Mon, 8 Feb 2021 11:14:19 +0000
From:   John Garry <john.garry@...wei.com>
To:     Luo Jiaxing <luojiaxing@...wei.com>, <maz@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
        <linuxarm@...neuler.org>
Subject: Re: [Linuxarm] [PATCH v1 0/2] irqchip/gic-v3-its: don't set bitmap
 for LPI which user didn't allocate

On 08/02/2021 10:58, Luo Jiaxing wrote:
> When the number of online CPUs is less than 16, we found that it will fail
> to allocate 32 MSI interrupts (including 16 affinity interrupts) after the
> hisi_sas module is unloaded and then reloaded.
> 
> After analysis, it is found that a bug exists when the ITS releases
> interrupt resources, and this patch set contains a bugfix patch and a patch
> for appending debugging information.

Please note that this issue has already been reported:
https://lore.kernel.org/lkml/fd88ce05-8aee-5b1f-5ab6-be88fa53d3aa@huawei.com/

> 
> Luo Jiaxing (2):
>    irqchip/gic-v3-its: don't set bitmap for LPI which user didn't
>      allocate
>    genirq/msi: add an error print when __irq_domain_alloc_irqs() failed
> 
>   drivers/irqchip/irq-gic-v3-its.c | 4 ++++
>   kernel/irq/msi.c                 | 1 +
>   2 files changed, 5 insertions(+)
>