From patchwork Fri Jul 26 05:05:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Herrenschmidt X-Patchwork-Id: 11060259 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 24DC0112C for ; Fri, 26 Jul 2019 05:05:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 11A67288EA for ; Fri, 26 Jul 2019 05:05:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 040EA28A27; Fri, 26 Jul 2019 05:05:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AC04E288EA for ; Fri, 26 Jul 2019 05:05:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725944AbfGZFFz (ORCPT ); Fri, 26 Jul 2019 01:05:55 -0400 Received: from gate.crashing.org ([63.228.1.57]:51643 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725836AbfGZFFz (ORCPT ); Fri, 26 Jul 2019 01:05:55 -0400 Received: from ufdda393ec48b57.ant.amazon.com (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id x6Q55j3P017580; Fri, 26 Jul 2019 00:05:48 -0500 From: Benjamin Herrenschmidt To: Linux USB List Cc: Felipe Balbi , Alan Stern , Greg KH , Benjamin Herrenschmidt Subject: [PATCH v3 01/10] usb: gadget: aspeed: Don't set port enable change bit on reset Date: Fri, 26 Jul 2019 15:05:30 +1000 Message-Id: <20190726050539.7875-2-benh@kernel.crashing.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190726050539.7875-1-benh@kernel.crashing.org> References: <20190726050539.7875-1-benh@kernel.crashing.org> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This bit should be only set when the port enable goes down, for example, on errors. Not when it gets set after a port reset. Some USB stacks seem to be sensitive to this and fails enumeration. Signed-off-by: Benjamin Herrenschmidt --- drivers/usb/gadget/udc/aspeed-vhub/hub.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/udc/aspeed-vhub/hub.c b/drivers/usb/gadget/udc/aspeed-vhub/hub.c index 7c040f56100e..0755115fd90d 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/hub.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/hub.c @@ -449,8 +449,15 @@ static void ast_vhub_change_port_stat(struct ast_vhub *vhub, USB_PORT_STAT_C_OVERCURRENT | USB_PORT_STAT_C_RESET | USB_PORT_STAT_C_L1; - p->change |= chg; + /* + * We only set USB_PORT_STAT_C_ENABLE if we are disabling + * the port as per USB spec, otherwise MacOS gets upset + */ + if (p->status & USB_PORT_STAT_ENABLE) + chg &= ~USB_PORT_STAT_C_ENABLE; + + p->change = chg; ast_vhub_update_hub_ep1(vhub, port); } }