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 6490C477995; Tue, 16 Jun 2026 16:55:18 +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=1781628919; cv=none; b=rd8FXuCqi3UevFNE+lrJCxklPc2wxYreJpEYjNNpvqEh/Kq+LvGisfjY5qOeZKtwtpLuwwPyYeNeGwljXYIEAfulYneIRWY+WmBglVFaxE6DId8voPIRMu75daWWQu8sOfCrxJGrwg54hQu12uQyMdY3cJOuDQKDHfSoPXEB1B0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781628919; c=relaxed/simple; bh=mwX7/RN26CQ/XqT914i1abrpTYpv1rI446np1K7wNHo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U9uJ6ZHH5Inmqtv3xhZGgY3ocTAw9l/Wh7CK0DHbtXl+LHBKSj3i3F8RehmYb7PYEh3gZE3EjtEb8sF93NdNex1tCxgaRLRKGKYikrxfCan9rWMyyxmf1kEJH/hsqPA6d1mqN0Lil5Wv8cXeLBtLW6PA9j7P2f8MPWVwBeAUqY4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0sj9lR3m; 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="0sj9lR3m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 33BAC1F000E9; Tue, 16 Jun 2026 16:55:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781628918; bh=kf5BQEVNk/PWAXBbTXEQ7Od+aCNce0R/ZIzg7QlJ63M=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=0sj9lR3m0i4Q8Wz9lb9ROJ6wzNDHlMG8uLlN8PWWAnCm1LnKFz2X0o3KXY05V8iiT fpfnuCwkPK+MH/F1UT7RgJ99eV/SPh6pprdXdgGtjQ1OjuAs/itGXP/9Zx7Wlu4B4W ttlovg+NnOfGoJpZuVREh0514UrLDU/yd9t+DL+E= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Stephen J. Fuhry" , stable Subject: [PATCH 6.6 153/452] USB: quirks: add NO_LPM for Lenovo ThinkPad USB-C Dock Gen2 hub controllers Date: Tue, 16 Jun 2026 20:26:20 +0530 Message-ID: <20260616145125.738207424@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145117.796205997@linuxfoundation.org> References: <20260616145117.796205997@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 6.6-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 },