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From: Thomas Gleixner <tglx@kernel.org>
To: Guixin Liu <kanie@linux.alibaba.com>, Bjorn Helgaas
 <bhelgaas@google.com>, Lorenzo Pieralisi <lpieralisi@kernel.org>, Marc
 Zyngier <maz@kernel.org>, Jonathan Cameron <jonathan.cameron@huawei.com>,
 Inochi Amaoto <inochiama@gmail.com>, Nam Cao <namcao@linutronix.de>,
 Shradha Gupta <shradhagupta@linux.microsoft.com>, Randy Dunlap
 <rdunlap@infradead.org>
Cc: Xunlei Pang <xlpang@linux.alibaba.com>, oliver.yang@linux.alibaba.com,
 linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH 2/2] PCI/MSI: Update MSI-X irq domain hwsize
In-Reply-To: <d57bf449-cd26-4fbd-891e-77534124e997@linux.alibaba.com>
References: <20260324014754.4973-1-kanie@linux.alibaba.com>
 <20260324014754.4973-3-kanie@linux.alibaba.com> <87mrzxgwfs.ffs@tglx>
 <fe47586d-688f-409c-95b5-d2cc54871f3a@linux.alibaba.com>
 <87mrzwfj7z.ffs@tglx>
 <d57bf449-cd26-4fbd-891e-77534124e997@linux.alibaba.com>
Date: Wed, 25 Mar 2026 14:58:56 +0100
Message-ID: <87h5q4f1sv.ffs@tglx>
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On Wed, Mar 25 2026 at 16:40, Guixin Liu wrote:
> =E5=9C=A8 2026/3/25 15:42, Thomas Gleixner =E5=86=99=E9=81=93:
>> So the straight forward solution is to free the MSI domain when the
>> driver shuts down and tears the MSI interrupts down.
> Yes, I had also considered this aspect before, I will change the scheme=20
> to this, and send another patch, thanks.

Actually none of that is required. When you update the firmware then
just let the PCI core rescan the device. That makes way more sense as
the new firmware might change other config entries as well not only the
MSI ones.

Thanks,

        tglx