From patchwork Tue Nov 27 06:49:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 10699767 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 92ABE13BF for ; Tue, 27 Nov 2018 06:51:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 849272A275 for ; Tue, 27 Nov 2018 06:51:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 74EA02A25A; Tue, 27 Nov 2018 06:51:16 +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 lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2CC3E2A267 for ; Tue, 27 Nov 2018 06:51:16 +0000 (UTC) Received: from localhost ([::1]:40296 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gRXDH-00030o-Cy for patchwork-qemu-devel@patchwork.kernel.org; Tue, 27 Nov 2018 01:51:15 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38459) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gRXBl-0001n6-SV for qemu-devel@nongnu.org; Tue, 27 Nov 2018 01:49:42 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gRXBj-0001NU-0A for qemu-devel@nongnu.org; Tue, 27 Nov 2018 01:49:41 -0500 Received: from mx1.redhat.com ([209.132.183.28]:51062) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gRXBi-0001GJ-Oi for qemu-devel@nongnu.org; Tue, 27 Nov 2018 01:49:38 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E1BF63001932; Tue, 27 Nov 2018 06:49:36 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-59.ams2.redhat.com [10.36.116.59]) by smtp.corp.redhat.com (Postfix) with ESMTP id 99507608C3; Tue, 27 Nov 2018 06:49:36 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id EF3455E4E6; Tue, 27 Nov 2018 07:49:32 +0100 (CET) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Tue, 27 Nov 2018 07:49:31 +0100 Message-Id: <20181127064932.7299-6-kraxel@redhat.com> In-Reply-To: <20181127064932.7299-1-kraxel@redhat.com> References: <20181127064932.7299-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.47]); Tue, 27 Nov 2018 06:49:36 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 5/6] usb-host: set ifs.detached as true if kernel driver is not active X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Gerd Hoffmann , linzhecheng , Markus Armbruster Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: linzhecheng If no kernel driver is active, we can already claim and perform I/O on it without detaching it. Signed-off-by: linzhecheng Message-id: 20181120083419.17716-1-linzhecheng@huawei.com Signed-off-by: Gerd Hoffmann --- hw/usb/host-libusb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c index f31e9cbbb8..b6602ded4e 100644 --- a/hw/usb/host-libusb.c +++ b/hw/usb/host-libusb.c @@ -1120,6 +1120,9 @@ static void usb_host_detach_kernel(USBHostDevice *s) rc = libusb_kernel_driver_active(s->dh, i); usb_host_libusb_error("libusb_kernel_driver_active", rc); if (rc != 1) { + if (rc == 0) { + s->ifs[i].detached = true; + } continue; } trace_usb_host_detach_kernel(s->bus_num, s->addr, i);