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Date:   Fri, 31 Mar 2023 09:40:23 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Mathias Nyman <mathias.nyman@linux.intel.com>
Cc:     linux-usb@vger.kernel.org,
        D Scott Phillips <scott@os.amperecomputing.com>,
        Marc Zyngier <maz@kernel.org>
Subject: Re: [PATCH 1/3] xhci: also avoid the XHCI_ZERO_64B_REGS quirk with a
 passthrough iommu
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References: <20230330143056.1390020-1-mathias.nyman@linux.intel.com>
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On Fri, Mar 31, 2023 at 10:35:07AM +0300, Mathias Nyman wrote:
> On 30.3.2023 17.40, Greg KH wrote:
> > On Thu, Mar 30, 2023 at 05:30:54PM +0300, Mathias Nyman wrote:
> > > From: D Scott Phillips <scott@os.amperecomputing.com>
> > > 
> > > Previously the quirk was skipped when no iommu was present. The same
> > > rationale for skipping the quirk also applies in the iommu.passthrough=1
> > > case.
> > > 
> > > Skip applying the XHCI_ZERO_64B_REGS quirk if the device's iommu domain is
> > > passthrough.
> > > 
> > > Fixes: 12de0a35c996 ("xhci: Add quirk to zero 64bit registers on Renesas PCIe controllers")
> > 
> > Why not also for stable?
> 
> Ah, yes, this should go to stable as well.

Thanks for confirming these, as you noticed, all are applied to my tree
now.

greg k-h