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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 7CC42C33C9E for ; Sat, 11 Jan 2020 09:51:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 52D002072E for ; Sat, 11 Jan 2020 09:51:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578736307; bh=0tfJB8IaM16mliPMALgKOAgQT3NctUFaBJelVw9MIRM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=iKxX1t8OLAU3yKFaHKaJ9E20Y/DouVLi2N0BXny6UmXtsksB8YV6lHVx9Xr18pyf4 u2Neh3ua3bAN+MfcDaW3FBH7rfEXgSV+g/DWtNJhLPelRRnszDE2LWwPsgxl9nEXs9 dOSR5H6Ahu9IM7XkHfbLs6ZfNW/p2aQYshfwRJc8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728968AbgAKJvq (ORCPT ); Sat, 11 Jan 2020 04:51:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:35804 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728954AbgAKJvo (ORCPT ); Sat, 11 Jan 2020 04:51:44 -0500 Received: from localhost (unknown [62.119.166.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0C2902072E; Sat, 11 Jan 2020 09:51:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578736304; bh=0tfJB8IaM16mliPMALgKOAgQT3NctUFaBJelVw9MIRM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=egIeCaA2/8VGG3hsXseUjLsO9KVYaNc2L03Gb4ZUIyMCoF+kQWO2GLAbXPmQ9lNmz Ils6gh4sE0GGDiNhDRMFuj8kjZzxF0eTwpTOmYeNvEYH+TzVBnZgBRQqgQ5wOuXI3w V5DroOr+RJ1aSeSiNswv/wC7U1Tu/gOo1k4jMtHY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peter Chen , EJ Hsu , Felipe Balbi , Sasha Levin Subject: [PATCH 4.4 07/59] usb: gadget: fix wrong endpoint desc Date: Sat, 11 Jan 2020 10:49:16 +0100 Message-Id: <20200111094838.299767249@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200111094835.417654274@linuxfoundation.org> References: <20200111094835.417654274@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: EJ Hsu [ Upstream commit e5b5da96da50ef30abb39cb9f694e99366404d24 ] Gadget driver should always use config_ep_by_speed() to initialize usb_ep struct according to usb device's operating speed. Otherwise, usb_ep struct may be wrong if usb devcie's operating speed is changed. The key point in this patch is that we want to make sure the desc pointer in usb_ep struct will be set to NULL when gadget is disconnected. This will force it to call config_ep_by_speed() to correctly initialize usb_ep struct based on the new operating speed when gadget is re-connected later. Reviewed-by: Peter Chen Signed-off-by: EJ Hsu Signed-off-by: Felipe Balbi Signed-off-by: Sasha Levin --- drivers/usb/gadget/function/f_ecm.c | 6 +++++- drivers/usb/gadget/function/f_rndis.c | 1 + 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/function/f_ecm.c b/drivers/usb/gadget/function/f_ecm.c index 7ad60ee41914..4ce19b860289 100644 --- a/drivers/usb/gadget/function/f_ecm.c +++ b/drivers/usb/gadget/function/f_ecm.c @@ -625,8 +625,12 @@ static void ecm_disable(struct usb_function *f) DBG(cdev, "ecm deactivated\n"); - if (ecm->port.in_ep->enabled) + if (ecm->port.in_ep->enabled) { gether_disconnect(&ecm->port); + } else { + ecm->port.in_ep->desc = NULL; + ecm->port.out_ep->desc = NULL; + } usb_ep_disable(ecm->notify); ecm->notify->desc = NULL; diff --git a/drivers/usb/gadget/function/f_rndis.c b/drivers/usb/gadget/function/f_rndis.c index e587767e374c..e281af92e084 100644 --- a/drivers/usb/gadget/function/f_rndis.c +++ b/drivers/usb/gadget/function/f_rndis.c @@ -619,6 +619,7 @@ static void rndis_disable(struct usb_function *f) gether_disconnect(&rndis->port); usb_ep_disable(rndis->notify); + rndis->notify->desc = NULL; } /*-------------------------------------------------------------------------*/ -- 2.20.1