From patchwork Wed Jan 16 15:58:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan-Marek Glogowski X-Patchwork-Id: 10766315 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 57967746 for ; Wed, 16 Jan 2019 15:59:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BC3F12DF50 for ; Wed, 16 Jan 2019 15:59:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B0D4D2E3D6; Wed, 16 Jan 2019 15:59:10 +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 9190F2DF50 for ; Wed, 16 Jan 2019 15:59:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404655AbfAPP7I (ORCPT ); Wed, 16 Jan 2019 10:59:08 -0500 Received: from ironboyv.h-da.de ([141.100.10.230]:3680 "EHLO ironboyv.h-da.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404382AbfAPP7H (ORCPT ); Wed, 16 Jan 2019 10:59:07 -0500 IronPort-SDR: LABrZvujgiZH+diG+xXcyN73yTa7eE+sYEbRQBukntQYH5/edo7MUUhzK1M/VP2Rc8r5e2kDWf ALU1jAD7bWHJbeWnU0z+MhwWh3v0lRBMibRjP1cqO9CNLv33ql0CNOe7oissTgQn5q5zwwWfYl F+SgVfDyD5MWYNPyvM9p/whFPAJLB0lLvCU9MU3bOuTc7604vlhpBuU77a3mXKwr28kJCBQf9K llabTwUoILhvxS6VtbGD6Fp+Hku5u+hiEUC6Bz3zZPZ310wCJds5U5fS2AKXiGS/YQ0VHWI6cB jkc= X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A2FdAACNVD9c/2soZI1jHAEBAQQBAQcEAQGBUgYBAQsBAYICgVYSJ5d6TAEBAQEBB5kzFIFnOYRAAoJUIjUIDQEDAQECAQECAgJpKEIBDgGEegaBCRg5VxmDIoF1EaxVGgKFJ4Rwh36EQRd4gQeBEIRUAYMoZIUTAqIQCYEXkH4WihsZA4dTAYMmmTACNYFWTSQUgyeCJwwLjh8+M4EfgTiIWwEB X-IPAS-Result: A2FdAACNVD9c/2soZI1jHAEBAQQBAQcEAQGBUgYBAQsBAYICgVYSJ5d6TAEBAQEBB5kzFIFnOYRAAoJUIjUIDQEDAQECAQECAgJpKEIBDgGEegaBCRg5VxmDIoF1EaxVGgKFJ4Rwh36EQRd4gQeBEIRUAYMoZIUTAqIQCYEXkH4WihsZA4dTAYMmmTACNYFWTSQUgyeCJwwLjh8+M4EfgTiIWwEB Received: from unknown (HELO mail.fbihome.de) ([141.100.40.107]) by ironboyv.h-da.de with ESMTP; 16 Jan 2019 16:58:54 +0100 Received: from kvm-sbuild2.tvc.muenchen.de. (unknown [194.113.41.246]) by mail.fbihome.de (Postfix) with ESMTPSA id 7CA4E42158 for ; Wed, 16 Jan 2019 16:58:03 +0100 (CET) From: Jan-Marek Glogowski To: linux-usb@vger.kernel.org Subject: [PATCH] usb: warm-reset ports on hub resume, if requested Date: Wed, 16 Jan 2019 16:58:50 +0100 Message-Id: <1547654330-25405-1-git-send-email-glogow@fbihome.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: References: 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 On plug-in of my USB-C device, its USB_SS_PORT_LS_SS_INACTIVE link state bit is set. Greping all the kernel for this bit shows that the port status requests a warm-reset this way. This just happens, if its the only device on that hub and the hub resumes, so we don't call port_event, which would otherwise warm-reset ports. The device works ok without this patch, if there is already any other device connected to the hub. Signed-off-by: Jan-Marek Glogowski --- drivers/usb/core/hub.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 1d1e61e..21a38d3 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -108,6 +108,16 @@ EXPORT_SYMBOL_GPL(ehci_cf_port_reset_rwsem); static void hub_release(struct kref *kref); static int usb_reset_and_verify_device(struct usb_device *udev); static int hub_port_disable(struct usb_hub *hub, int port1, int set_state); +static bool hub_port_warm_reset_required(struct usb_hub *hub, int port1, + u16 portstatus); +static int hub_port_reset(struct usb_hub *hub, int port1, + struct usb_device *udev, unsigned int delay, bool warm); + +#define HUB_ROOT_RESET_TIME 60 /* times are in msec */ +#define HUB_SHORT_RESET_TIME 10 +#define HUB_BH_RESET_TIME 50 +#define HUB_LONG_RESET_TIME 200 +#define HUB_RESET_TIMEOUT 800 static inline char *portspeed(struct usb_hub *hub, int portstatus) { @@ -1122,6 +1132,9 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type) USB_SS_PORT_LS_POLLING)) need_debounce_delay = true; + if (hub_port_warm_reset_required(hub, port1, portstatus)) + hub_port_reset(hub, port1, udev, HUB_BH_RESET_TIME, true); + /* Clear status-change flags; we'll debounce later */ if (portchange & USB_PORT_STAT_C_CONNECTION) { need_debounce_delay = true; @@ -2653,12 +2666,6 @@ static unsigned hub_is_wusb(struct usb_hub *hub) #define SET_CONFIG_TRIES (2 * (use_both_schemes + 1)) #define USE_NEW_SCHEME(i, scheme) ((i) / 2 == (int)scheme) -#define HUB_ROOT_RESET_TIME 60 /* times are in msec */ -#define HUB_SHORT_RESET_TIME 10 -#define HUB_BH_RESET_TIME 50 -#define HUB_LONG_RESET_TIME 200 -#define HUB_RESET_TIMEOUT 800 - /* * "New scheme" enumeration causes an extra state transition to be * exposed to an xhci host and causes USB3 devices to receive control