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 A0F46296BCC; Sun, 7 Jun 2026 10:47:01 +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=1780829222; cv=none; b=cEDq+y7Su5iqO2DmLdv6eca2/sTSGLgbYfQ3/5sNB5w62Bf6DgB/ttI393LQQAPbJ+cumDKgvHqydEeY07gPhd+BqnLTFpRu+DAMG+chr8CP8/+/Fe+i8S5XUzaNcU5QbuM7NfjIWDzo15QNd1OJHbqPmoV7qP07wOleDAtiWBQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780829222; c=relaxed/simple; bh=wigbhd06SQ5mzgYTZhzBvR0IRxlkE9YrjBfzoeHyCkM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=P3O06U66LcoD/tSSlSGAsWaPjCafHcBhfbM5OXzEfXexbE+9/n3ktqu3t+9Szx1faUfoSk6jcGDCPd5V0Xwg98jyi1iTrmMwgRC2XsrGF0OlI62cHMUQFK0mTKe9xRTZpiCRa/rDNMmqHbzlUuuT2g6tEMdEkm1aEWw8iX0PHeA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=CrK4gTTu; 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="CrK4gTTu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DECE31F00893; Sun, 7 Jun 2026 10:47:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780829221; bh=nOI9ebQu30qecAVKMwwdpVksF38n2bHLvSsUe28eW1Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CrK4gTTuV2rUXe77h60ZM6aYnGZbH9VpJpwA6ESGIzkbdpDIdIOqIXJv5SFOSwYob hqqXEImG67dhJwJ6pnChCZK6xGI/SwT3R1djn39Uvzz7wB3Fd/Nfdz6pGmJ9r0eFTs 1Ag3EW7tuT3XDAXOd0nWix8tQTPlAIyrDjVJaBp8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Stephen J. Fuhry" , stable Subject: [PATCH 7.0 255/332] USB: quirks: add NO_LPM for Lenovo ThinkPad USB-C Dock Gen2 hub controllers Date: Sun, 7 Jun 2026 12:00:24 +0200 Message-ID: <20260607095737.411505900@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260607095728.031258202@linuxfoundation.org> References: <20260607095728.031258202@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 7.0-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 @@ -513,6 +513,10 @@ 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 },