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[83.28.37.152]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49ff06b6108sm50928595e9.8.2026.09.25.01.40.16 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Fri, 25 Sep 2026 01:40:16 -0700 (PDT) Date: Fri, 25 Sep 2026 10:40:13 +0200 From: Michal Pecio To: Ben Cc: Mathias Nyman , Mika Westerberg , linux-usb@vger.kernel.org, andreas.noever@gmail.com, westeri@kernel.org, YehezkelShB@gmail.com Subject: Re: xhci_hcd 0000:0c:00.0 dies with "Abort failed to stop command ring: -110" exactly 24s post-init, tunneled USB4 xHCI behind Goshen Ridge (ASUS ThunderboltEX 4) + CalDigit TS4 Message-ID: <20260925104013.1c8e21cb.michal.pecio@gmail.com> In-Reply-To: <20260925102746.25e87ef0.michal.pecio@gmail.com> References: <20260915043845.GG106095@black.igk.intel.com> <20260915050515.GI106095@black.igk.intel.com> <20260916075135.GN106095@black.igk.intel.com> <20260917043847.GV106095@black.igk.intel.com> <20260921044453.GJ106095@black.igk.intel.com> <20260922042608.GZ106095@black.igk.intel.com> <2a4026e7-f5d3-4301-bc60-0570cbd7fa09@linux.intel.com> <20260925102746.25e87ef0.michal.pecio@gmail.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Fri, 25 Sep 2026 10:27:46 +0200, Michal Pecio wrote: > Broken 64 bit support usually shows as IOMMU faults logged in dmesg, > because the chip tries to access different addresses than intended. > Here, it looks like this chip doesn't attempt DMA at all. But wait a moment, are you sure that you have removed all the weird boot options as requested, and particularly iommu=soft? This option being present could explain why the chip is set up with addresses >4GB, which is otherwise a little unusual thing to see. Using iommu=soft is 100% asking for trouble and it makes debugging harder too. Regards, Michal