From owner-freebsd-usb@freebsd.org Mon Sep 3 16:32:47 2018 Return-Path: Delivered-To: freebsd-usb@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E6228FEE283 for ; Mon, 3 Sep 2018 16:32:46 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 8CAA38B6B8 for ; Mon, 3 Sep 2018 16:32:46 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id 47F95FEE282; Mon, 3 Sep 2018 16:32:46 +0000 (UTC) Delivered-To: usb@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 368BCFEE281 for ; Mon, 3 Sep 2018 16:32:46 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id C9B0A8B6B5 for ; Mon, 3 Sep 2018 16:32:45 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 19D622184C for ; Mon, 3 Sep 2018 16:32:45 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w83GWiKJ097310 for ; Mon, 3 Sep 2018 16:32:44 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w83GWirv097309 for usb@FreeBSD.org; Mon, 3 Sep 2018 16:32:44 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 231076] libusb_cancel_transfer() does NOT cancel a transfer after the USB device is removed Date: Mon, 03 Sep 2018 16:32:45 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: usb X-Bugzilla-Version: 10.4-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: ludovic.rousseau+freebsd@gmail.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: usb@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-usb@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: FreeBSD support for USB List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 03 Sep 2018 16:32:47 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D231076 --- Comment #3 from Ludovic Rousseau -= -- I added logs in my code. When I start the transfer I have: 00000006 ccid_usb.c:1329:InterruptRead() uxfer->dev_handle: 0x28c0c9c0 When I cancel the transfer I have: 00000004 ccid_usb.c:1399:InterruptStop() uxfer->dev_handle: 0x28c0c9c0 So the problem is not at line 1501 as I initially mentioned. https://github.com/freebsd/freebsd/blob/master/lib/libusb/libusb10.c#L1501 No, the handle has not been closed. libusb_close() is called _after_ the transfer is cancelled. Yes, the transfer has started. At least I get no error when I start it. Yes, I get data from the interrupt pipe when a smart card is inserted or removed. So the USB communication does work with the interrupt pipe. Yes, I can cancel the transfer when the USB device is present. The program = does that when Ctrl-C is used to stop it. The problem happens when the USB device is no more connected. I added a call to libusb_set_debug(ctx, LIBUSB_LOG_LEVEL_DEBUG); in my code= but I don't see more debug. I see that libusb uses DPRINTF(). How can I get the generated log messages? --=20 You are receiving this mail because: You are the assignee for the bug.=