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Date: Mon, 5 Dec 2022 11:55:45 +0100
From: Joerg Roedel <joro@8bytes.org>
To: Ricardo Ribalda <ribalda@chromium.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
	Yong Wu <yong.wu@mediatek.com>, Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, iommu@lists.linux.dev,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] iommu/mediatek: Fix crash on isr after kexec()
Message-ID: <Y43OMbwJUTv0dmOt@8bytes.org>
References: <20221125-mtk-iommu-v2-0-e168dff7d43e@chromium.org>
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In-Reply-To: <20221125-mtk-iommu-v2-0-e168dff7d43e@chromium.org>

On Mon, Nov 28, 2022 at 11:16:48PM +0100, Ricardo Ribalda wrote:
> If the system is rebooted via isr(), the IRQ handler might be triggerd
> before the domain is initialized. Resulting on an invalid memory access
> error.
> 
> Fix:
> [    0.500930] Unable to handle kernel read from unreadable memory at virtual address 0000000000000070
> [    0.501166] Call trace:
> [    0.501174]  report_iommu_fault+0x28/0xfc
> [    0.501180]  mtk_iommu_isr+0x10c/0x1c0
> 
> Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>

Applied with commit-message spelling fix.