From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 852F83D8100; Tue, 16 Jun 2026 18:50:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781635846; cv=none; b=OQkR/6i2JIGh1zDuQeCzkmx3EPVlrOK8i0XLAmJBCsV3V5wOU1AGlr5nRa4gVU1K7vZXXbHoh499i68Nja4Bo0vkQpUc0fnuxEcBS9WSvnuyYtwcI3CVtt6B6YaqlbiGpnbGoGDbZVoLHOVO8WoAmkgYkDRQqtlePGyziL6gyQ4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781635846; c=relaxed/simple; bh=FXI0/cdClf08XUQvDFx1pyzLgaE7EJBlw0EG8ZbLqyc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=p0LP7p/IRyc7n/0VeiImPFffVCjfOCZ91b6Duq3PY3alzHOZd+j/iOFrctYKCZKcPQ21C9a/xYsoiZAUcboNPkvCldfyAin+f1zynKrMxllSJUEeAiPVzIrr0MPLM6azs+n/CgZeF5qhM+1c8680F6R05ia0wv0ghjIrX+i0Weo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PetlyBR7; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="PetlyBR7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 713AB1F000E9; Tue, 16 Jun 2026 18:50:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781635845; bh=SaRC1ogAo6M2ZVlNhVYdSnOKS/i6rR0EVT9jUSioVhw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=PetlyBR7wXDnWCyUwnWl8szBCTHBQyPr0FxWcG2xMLyxigs30lT+I1+/g4qUiQa2Q /Mc6dS/AwixjBXDTBZBNYO4sWM0cpAptY607g446e0hNRDnNuDHLl86zAe07PtngO8 80QPgqtdQA5/QCFruxcY6uoL7ZjBQ+VacdX2eyqA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Stephen J. Fuhry" , stable Subject: [PATCH 5.10 092/342] USB: quirks: add NO_LPM for Lenovo ThinkPad USB-C Dock Gen2 hub controllers Date: Tue, 16 Jun 2026 20:26:28 +0530 Message-ID: <20260616145052.522325242@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145048.348037099@linuxfoundation.org> References: <20260616145048.348037099@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stephen J. Fuhry commit 9ddb9c0deca48d2c2a22ebf4d2f35c925a520328 upstream. The Lenovo ThinkPad USB-C Dock Gen2 (17ef:a391, 17ef:a392) hub controllers exhibit link instability when USB Link Power Management is enabled, similar to the dock's Ethernet adapter (17ef:a387) which already carries USB_QUIRK_NO_LPM. When the dock reconnects after a transient disconnect, the hub controllers enter LPM states between re-enumeration retries, causing repeated disconnect/reconnect cycles lasting up to two minutes. Disabling LPM for these devices restores stable enumeration. Signed-off-by: Stephen J. Fuhry Cc: stable Link: https://patch.msgid.link/20260513171419.44849-1-fuhrysteve@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/quirks.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -498,6 +498,10 @@ static const struct usb_device_id usb_qu /* Lenovo ThinkPad USB-C Dock Gen2 Ethernet (RTL8153 GigE) */ { USB_DEVICE(0x17ef, 0xa387), .driver_info = USB_QUIRK_NO_LPM }, + /* Lenovo ThinkPad USB-C Dock Gen2 USB 3.1 and USB 2.0 hub controllers */ + { USB_DEVICE(0x17ef, 0xa391), .driver_info = USB_QUIRK_NO_LPM }, + { USB_DEVICE(0x17ef, 0xa392), .driver_info = USB_QUIRK_NO_LPM }, + /* BUILDWIN Photo Frame */ { USB_DEVICE(0x1908, 0x1315), .driver_info = USB_QUIRK_HONOR_BNUMINTERFACES },