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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 86DB4C433E0 for ; Wed, 17 Jun 2020 10:49:04 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4ADB3208B3 for ; Wed, 17 Jun 2020 10:49:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="TS2CVvFI" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4ADB3208B3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37470 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jlVct-0006yF-F8 for qemu-devel@archiver.kernel.org; Wed, 17 Jun 2020 06:49:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59592) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jlVbr-0005Vp-RQ for qemu-devel@nongnu.org; Wed, 17 Jun 2020 06:47:59 -0400 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:55766 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1jlVbq-0002fj-3f for qemu-devel@nongnu.org; Wed, 17 Jun 2020 06:47:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1592390877; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:content-type:content-type:in-reply-to:in-reply-to: references:references; bh=O9zf9n7GEiVsmXcOFimTPQREBfNNWSvJ/Vo90Qn26VE=; b=TS2CVvFI9dzr5GCgQzCjPUBxuaQW+HvUbvP2UXoni9GAoDWoH8NuOH9zCuqRhSDbGXG1BS R1iBOFCK3IBF4p18QfZK7XUSdioD/AbmvXKaZyxs2YGSnPZJnBnQ5qNjM4yTSwPtM/+xr1 ofRVlSD1DaLOzbVxiLZS2CsPiOjCkHY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-356-iMjN69rXNEqbuQWFCR2zWg-1; Wed, 17 Jun 2020 06:47:55 -0400 X-MC-Unique: iMjN69rXNEqbuQWFCR2zWg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id BC9DF10A86C8 for ; Wed, 17 Jun 2020 10:47:54 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-112-67.ams2.redhat.com [10.36.112.67]) by smtp.corp.redhat.com (Postfix) with ESMTP id BB7A45C1C3; Wed, 17 Jun 2020 10:47:51 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 901E51753C; Wed, 17 Jun 2020 12:47:50 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PULL 2/2] usb-host: workaround libusb bug Date: Wed, 17 Jun 2020 12:47:50 +0200 Message-Id: <20200617104750.29511-3-kraxel@redhat.com> In-Reply-To: <20200617104750.29511-1-kraxel@redhat.com> References: <20200617104750.29511-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Received-SPF: pass client-ip=205.139.110.120; envelope-from=kraxel@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/16 23:30:45 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Gerd Hoffmann Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" libusb seems to no allways call the completion callback for requests canceled (which it is supposed to do according to the docs). So add a limit to avoid qemu waiting forever. Tested-by: BALATON Zoltan Signed-off-by: Gerd Hoffmann Message-Id: <20200529072225.3195-1-kraxel@redhat.com> --- hw/usb/host-libusb.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/hw/usb/host-libusb.c b/hw/usb/host-libusb.c index e88db544bc9e..ad7ed8fb0c67 100644 --- a/hw/usb/host-libusb.c +++ b/hw/usb/host-libusb.c @@ -972,6 +972,7 @@ fail: static void usb_host_abort_xfers(USBHostDevice *s) { USBHostRequest *r, *rtmp; + int limit = 100; QTAILQ_FOREACH_SAFE(r, &s->requests, next, rtmp) { usb_host_req_abort(r); @@ -982,6 +983,19 @@ static void usb_host_abort_xfers(USBHostDevice *s) memset(&tv, 0, sizeof(tv)); tv.tv_usec = 2500; libusb_handle_events_timeout(ctx, &tv); + if (--limit == 0) { + /* + * Don't wait forever for libusb calling the complete + * callback (which will unlink and free the request). + * + * Leaking memory here, to make sure libusb will not + * access memory which we have released already. + */ + QTAILQ_FOREACH_SAFE(r, &s->requests, next, rtmp) { + QTAILQ_REMOVE(&s->requests, r, next); + } + return; + } } } -- 2.18.4