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 087C72DFF04; Sun, 7 Jun 2026 10:49:17 +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=1780829357; cv=none; b=bHEJLL+9SpdAMekvrJXmpKdwrwFRQYbviBqdBRb8sT/R5ZRfY+arfAbmEO3qvLzbbSLk9/roavS1Ug8vq9w7uaLTnDmOLkq1qILndEpOJsNQrWhqmbZenp5/CIpL0AT6D7CX6eq4wTrDHAuFYfmGNLCSHlDgONVTh3Hmo1Sl6Rw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780829357; c=relaxed/simple; bh=yJE7njoPQJuQHvq4neZaCHjeAq1otrXhm9PBEFxte58=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NCPhtY2cTq92rfGh21SL61EtQ+84bSAlTQKI504cptRXbphd/FZ5Ki2y+LXQS3SYTTbZjeyJKQ6uJDgtdU0vC8ltYNUEH03AwLdn0tkBGglXY0OruuMs5zu3U0ucF1Hv7/xoFl/gCDpiRUkmbQ98fQZ69BbdsgoCZrqX9gPuEv4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2AnAWFLD; 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="2AnAWFLD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 33E3F1F00893; Sun, 7 Jun 2026 10:49:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780829356; bh=ETcqZ0p9gI9zgFruqnxak/icFFFE/pUWrGPFezAIBpc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=2AnAWFLDoGyLgaFQefCOTSTRGjXhv5RA6hlGVJxGICZ2ly1AhQk+fz6llyHuoiYYQ h3y3T0yF0Cw/SWmcfFgwa++8wCg6i2iA3q6DFeXbf1R5zFheNb38nhSi2HKaG++ywE TblbIbTSx19y5Ui7aliGoYvoa8o380bJUFHsQFTg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Stephen J. Fuhry" , stable Subject: [PATCH 6.12 217/307] USB: quirks: add NO_LPM for Lenovo ThinkPad USB-C Dock Gen2 hub controllers Date: Sun, 7 Jun 2026 12:00:14 +0200 Message-ID: <20260607095735.689608494@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260607095727.647295505@linuxfoundation.org> References: <20260607095727.647295505@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 6.12-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 @@ -511,6 +511,10 @@ 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 },