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 B13AD2D8378; Sun, 7 Jun 2026 10:46:44 +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=1780829205; cv=none; b=D3nrRgxBvIayoulKFpgyQffmMXinctEYZ7dUuWYG8ynbDtg49hscX7JyHGDVFH3mT29eCnS3LvCbaRIT9S1ZfMal/Q18O25ytCIo63WRtuY6aDPUXjtEGnwQB2mzrEzKRDVAtK1Es7xCJmVdeHcB66oqYuTB0oabtM7G2iyARLs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780829205; c=relaxed/simple; bh=utcWprRp2SVuI3kU+8Phuouqwewnlmj+FLhckQFfWhI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SsD25zQFl6ojYUt4lRYowKigQkid1Iw8QunlF/B+K5Wt7uJWsTbAomugSKA+VBXbjfjsIEEMoMzIJtbMY1FA/uaVpq0kmw20il9IRqZqyfFd04ksK06Y166xSiAn9oekxbhR2Q2UuwKZTtB+IVBBd/dFxyF6k/K3kWDmeHzF6Ns= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=b92lgxJR; 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="b92lgxJR" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 021DB1F00893; Sun, 7 Jun 2026 10:46:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780829204; bh=wXZ23LO1H6490i3gvzaTZeV8+RthJs5WYw2wQ2qdhrc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=b92lgxJRHMHj73H5Qe5NBax9NftWxhfRaT/3WXdv5gLXp8DkKRa96LmeySEjb8rOz pF4aKgnIFSA/OPgH0IfJKcmvGjayHYpUgPcZOLqQDOWpm5pFJl2NIATFxSH/zWYwNH eeznhk5bJMpY5XeXc+snpwnvhefK6gOXfktD7BuU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Stephen J. Fuhry" , stable Subject: [PATCH 6.18 225/315] USB: quirks: add NO_LPM for Lenovo ThinkPad USB-C Dock Gen2 hub controllers Date: Sun, 7 Jun 2026 12:00:12 +0200 Message-ID: <20260607095735.839885275@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260607095727.528828913@linuxfoundation.org> References: <20260607095727.528828913@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 6.18-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 @@ -514,6 +514,10 @@ 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 },