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Date:   Tue, 5 Apr 2022 07:19:15 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Thorsten Leemhuis <regressions@leemhuis.info>
Cc:     Christoph Hellwig <hch@lst.de>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Greg KH <gregkh@linuxfoundation.org>,
        bugzilla-daemon@kernel.org, linux-usb@vger.kernel.org
Subject: Re: [Bug 215740] New: kernel warning: DMA-API: xhci_hcd: cacheline
 tracking EEXIST, overlapping mappings aren't supported
Message-ID: <20220405051915.GA23138@lst.de>
References: <bug-215740-208809@https.bugzilla.kernel.org/> <69a5233e-aa11-073a-a390-3f80e6dc4466@leemhuis.info>
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On Thu, Mar 31, 2022 at 09:41:25AM +0200, Thorsten Leemhuis wrote:
> Hey Christoph, Marek, Greg!
> 
> Below warning was reported to bugzilla.kernel.org more than a week ago;
> to quote the important parts here:

The warning is from a new debug check added in 5.14 under a debug
config option.  So while the USB maintainers should look into fixing it
I don't think it is a regression in that traditional sense of the word.