linux-kernel - Re: [PATCH v4 03/33] iommu/io-pgtable-arm: Add quirk to quiet WARN

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Message-ID: <b98001c0-8374-4f00-9733-d9edf72c4989@oracle.com>
Date: Sat, 3 May 2025 00:59:55 +0530
From: ALOK TIWARI <alok.a.tiwari@...cle.com>
To: Rob Clark <robdclark@...il.com>, dri-devel@...ts.freedesktop.org
Cc: freedreno@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        Connor Abbott <cwabbott0@...il.com>,
        Rob Clark <robdclark@...omium.org>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>, Joerg Roedel <joro@...tes.org>,
        Jason Gunthorpe <jgg@...pe.ca>, Kevin Tian <kevin.tian@...el.com>,
        Nicolin Chen <nicolinc@...dia.com>,
        Joao Martins <joao.m.martins@...cle.com>,
        "moderated list:ARM SMMU DRIVERS" <linux-arm-kernel@...ts.infradead.org>,
        "open list:IOMMU SUBSYSTEM" <iommu@...ts.linux.dev>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 03/33] iommu/io-pgtable-arm: Add quirk to quiet
 WARN_ON()



On 02-05-2025 22:26, Rob Clark wrote:
> In situations where mapping/unmapping squence can be controlled by

typo squence -> sequence

> userspace, attempting to map over a region that has not yet been
> unmapped is an error.  But not something that should spam dmesg.
> 
> Now that there is a quirk, we can also drop the selftest_running
> flag, and use the quirk instead for selftests.
> 
> Signed-off-by: Rob Clark<robdclark@...omium.org>

Thanks,
Alok