From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 24DC72D7BF for ; Mon, 6 Apr 2026 02:31:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775442689; cv=none; b=XSBflNzY3ViafRsdaA7CbRqBBzI1F7RvRXYtqKyVd5ryfX/MpkYidZof1rU+8HhAcuYrAhef6N5HD9vP6YmFPeVIc2+ynoXVnZyeoOs4hLEu9ROMy4MxpT2w6vNFazfmzCdRckU7kFbM8MVgBbCGgDX3iLmNZMLYPE/DCadUmjw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775442689; c=relaxed/simple; bh=cRwipC/exTFENiDmSit9d3TJ3H8n+RvBwYXT9cJP/u0=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=FCbjiN/a/Dki8L1ph11aJocinmvJex+J3MjQKhB8yPK/i/pTi2Dq4Rgao8fChMYjvdYy3K0wbCqg1nIR06og/rc0M2OUYAulAu01aTtzeUu/Jg08w9G6F1JWT2d6N4LBUrmkNpSuuNVAZ7gmHwS0uwaLj+pBd2apg/ZjpzsGCKA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UDoszJRM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="UDoszJRM" Received: by smtp.kernel.org (Postfix) with ESMTPS id BC4ECC116C6 for ; Mon, 6 Apr 2026 02:31:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775442688; bh=cRwipC/exTFENiDmSit9d3TJ3H8n+RvBwYXT9cJP/u0=; h=From:To:Subject:Date:In-Reply-To:References:From; b=UDoszJRMsC9XWd686ueC+WaPPYwTSak0VUBrPb5wnU7LTnth4Vgd5VLfKUXkhJx6A vy41p3A1FbfWkgL4y6zgi8BWb5dFtG1dW7Yk9UYOb39/kAu5CeGOz8xx8n2n4YHfYg EJNST50xtYu4w39PeU0fwn7NN6mN2Li/Zdu2vA+hKNgn19bMQVKDy/cTzxqGulCsFR XMRwTOR0OfdpSMUy1Ffyd2buwYXC+E1hU5gFi2jAyTRwEmRE8y6Pz6k5bWHC9P4gHD pN18U7yKt6TtMVsOVu0F327drHZ/DFe4U94fH4IWNm4IGw4hrr0PPMNzA5+41IWt6F XlCoyRJK3OwDw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id A936EC4160E; Mon, 6 Apr 2026 02:31:28 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 221319] Certain operations via PCIe tunneling between an AMD USB4 host and a Thunderbolt-5 peripherals cause an instant reboot Date: Mon, 06 Apr 2026 02:31:28 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mario.limonciello@amd.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221319 --- Comment #6 from Mario Limonciello (AMD) (mario.limonciello@amd.com) --- Here's the message that I was looking for: > [ 1.657766] x86/amd: Previous system reset reason [0x08000800]: an > uncorrected error caused a data fabric sync flood event I suspect that there are some PCIe errors occurring either internal to the = SoC or (more likely) between the SoC and your new device. These are causing a flood of problems, and then the BIOS eventually triggers an internal watchd= og that reboots the system. Try adding this to your kernel command line and we'll see if there is anyth= ing new from the PCI core about the issue: > pcie_ports=3Dnative pcie_ecrc=3Don --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=