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 5D35D43D4ED; Tue, 16 Jun 2026 17:30:37 +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=1781631038; cv=none; b=L+HGPgIGOqzhb8VKWX5LsKSQxP9Ak0t4KKnCSjTX/QYzxdyWFVq0Z3BR2LshEHo60n9CP6zXv4kZkoyozHkVEYXVqRFj2Z5nSwuFAwaOd4GHKzojgMmgfFhFL5Cv2C/WgwSflIHJU2CO6obBEl12q0TpoGnng+r99FMdZJufJik= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781631038; c=relaxed/simple; bh=61EZxgjvH65/y+DUWnmI8JieZA13BLk4hrKvTN2z/Kw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=r35vrpu/CJb6b9K5+OpoNvvDKmj1Oe/CgknFlv/DFlau6rDWyLTudaiY3WPci6kNalbhQNDD6f4Itr0FNN+vn5rqN2m3QBhfPeiFZo8eTxTWLlXikGqNk69hhmBn9vR/IFgF5WZ6j5nmBSNBTutHykdSVCGSqa9NOgRU8XcDZFY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=p0GeLwLQ; 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="p0GeLwLQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 106A81F000E9; Tue, 16 Jun 2026 17:30:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781631036; bh=GOFjKCa3tQUgW0EEXtBGvE4fGTXasMkpF0856w4hem0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=p0GeLwLQ66ifXwNWDW29w6K3VzuNJB7NX1NIP54AsggtoMLBF6Q5CA7IP50YVUCue 5jYjQlgBjsFDKAVa3iJ5clNKAYYW9gO4rXs1qR8aFTvbBs/ur+OZBVot1uVtWnOyj3 XgB0V/sBXbltN0glxoL5oHsyi4dsoIthqK8Ttowg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Stephen J. Fuhry" , stable Subject: [PATCH 6.1 145/522] USB: quirks: add NO_LPM for Lenovo ThinkPad USB-C Dock Gen2 hub controllers Date: Tue, 16 Jun 2026 20:24:52 +0530 Message-ID: <20260616145132.881803048@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145125.307082728@linuxfoundation.org> References: <20260616145125.307082728@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 6.1-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 },