linux-kernel - Re: [regression] usb and thunderbould are misbehaving or broken due to iommu/vt-d change

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Message-ID: <b909bc01-327a-427b-9900-8f324a229770@linux.intel.com>
Date: Sun, 1 Sep 2024 17:12:12 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: "Tian, Kevin" <kevin.tian@...el.com>, Markus Rathgeb <maggu2810@...il.com>
Cc: baolu.lu@...ux.intel.com,
 Linux regressions mailing list <regressions@...ts.linux.dev>,
 Will Deacon <will@...nel.org>, David Woodhouse <dwmw2@...radead.org>,
 Joerg Roedel <joro@...tes.org>, "iommu@...ts.linux.dev"
 <iommu@...ts.linux.dev>, LKML <linux-kernel@...r.kernel.org>,
 Jacob Pan <jacob.jun.pan@...ux.intel.com>,
 Adam Williamson <awilliam@...hat.com>
Subject: Re: [regression] usb and thunderbould are misbehaving or broken due
 to iommu/vt-d change

On 2024/8/30 8:29, Tian, Kevin wrote:
>> From: Markus Rathgeb<maggu2810@...il.com>
>> Sent: Thursday, August 29, 2024 4:34 PM
>>
>> With respect to my previous comment I tested to fix it myself (I am
>> not a kernel hacker and do not know anything about iommu etc.).
>>
>> After applying the following change to the v6.11-rc5 it seems to fix my
>> problem.
>> I can connect, disconnect and connect the dock and USB is working and
>> no DMAR error.
>>
> as said there was already a fix posted which is similar to below:
> 
> https://lore.kernel.org/linux-iommu/20240815124857.70038-1-baolu.lu@linux.intel.com/

Above patch has been merged in v6.11-rc6. Please try the latest kernel
version.

Thanks,
baolu