From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AAA21C43460 for ; Mon, 5 Apr 2021 08:55:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A686610E8 for ; Mon, 5 Apr 2021 08:55:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232759AbhDEI4D (ORCPT ); Mon, 5 Apr 2021 04:56:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:34192 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232349AbhDEIz5 (ORCPT ); Mon, 5 Apr 2021 04:55:57 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 96D4961398; Mon, 5 Apr 2021 08:55:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617612952; bh=ssLj9Cg97ETf0FdLZhaGx+2uhY6HKRTP2jQW5w6Pllo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fdveP1dZnlQDcYikyApfMUttlo7ivtf/Yt72Xk35FJrAFcmlJjoCzU6zfx10rgFmx eJvzZx3rj09fTR2IY59uiKSye9hjdj3YdSmDQzQMaiHOxtHXGqULhNVsrncIbELbmo NBYPaZOkJEUAhpKDCRBZXXptSDIY3OqehrO3yohM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vincent Palatin Subject: [PATCH 4.4 23/28] USB: quirks: ignore remote wake-up on Fibocom L850-GL LTE modem Date: Mon, 5 Apr 2021 10:53:57 +0200 Message-Id: <20210405085017.747463142@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210405085017.012074144@linuxfoundation.org> References: <20210405085017.012074144@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vincent Palatin commit 0bd860493f81eb2a46173f6f5e44cc38331c8dbd upstream. This LTE modem (M.2 card) has a bug in its power management: there is some kind of race condition for U3 wake-up between the host and the device. The modem firmware sometimes crashes/locks when both events happen at the same time and the modem fully drops off the USB bus (and sometimes re-enumerates, sometimes just gets stuck until the next reboot). Tested with the modem wired to the XHCI controller on an AMD 3015Ce platform. Without the patch, the modem dropped of the USB bus 5 times in 3 days. With the quirk, it stayed connected for a week while the 'runtime_suspended_time' counter incremented as excepted. Signed-off-by: Vincent Palatin Link: https://lore.kernel.org/r/20210319124802.2315195-1-vpalatin@chromium.org Cc: stable 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 @@ -321,6 +321,10 @@ static const struct usb_device_id usb_qu /* DJI CineSSD */ { USB_DEVICE(0x2ca3, 0x0031), .driver_info = USB_QUIRK_NO_LPM }, + /* Fibocom L850-GL LTE Modem */ + { USB_DEVICE(0x2cb7, 0x0007), .driver_info = + USB_QUIRK_IGNORE_REMOTE_WAKEUP }, + /* INTEL VALUE SSD */ { USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },