From owner-freebsd-usb@freebsd.org Wed Sep 12 09:08:09 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 8AA61108CD70 for ; Wed, 12 Sep 2018 09:08:09 +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 2862A79CA1 for ; Wed, 12 Sep 2018 09:08:09 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id DEC49108CD6F; Wed, 12 Sep 2018 09:08:08 +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 CDBD0108CD6E for ; Wed, 12 Sep 2018 09:08:08 +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 6EFC879C9C for ; Wed, 12 Sep 2018 09:08:08 +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 C71387A50 for ; Wed, 12 Sep 2018 09:08:07 +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 w8C987QC020033 for ; Wed, 12 Sep 2018 09:08:07 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w8C987nt020025 for usb@FreeBSD.org; Wed, 12 Sep 2018 09:08:07 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 231322] libusb_bulk_transfer() does not fail (with LIBUSB_ERROR_NO_DEVICE) if the device is not more present Date: Wed, 12 Sep 2018 09:08:07 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: usb X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me 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: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: 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: Wed, 12 Sep 2018 09:08:09 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D231322 Bug ID: 231322 Summary: libusb_bulk_transfer() does not fail (with LIBUSB_ERROR_NO_DEVICE) if the device is not more present Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: usb Assignee: usb@FreeBSD.org Reporter: ludovic.rousseau+freebsd@gmail.com After a USB device has been removed I can (try to) send a USB packet using libusb_bulk_transfer(). The program then blocks instead of returning an err= or. I get the logs: LIBUSB_FUNCTION: libusb_bulk_transfer enter LIBUSB_FUNCTION: libusb_submit_transfer enter dev: 0x28c09b80 pxfer0: 0x28c2f0f0 pxfer1: 0x28c2f12c LIBUSB_FUNCTION: libusb_submit_transfer leave 0 LIBUSB_FUNCTION: libusb_handle_events_timeout_completed enter LIBUSB_FUNCTION: libusb10_handle_events_sub enter I added the dev and pxfer* logs. Then the program is blocked until I kill it using Ctrl-C. Under GNU/Linux libusb_bulk_transfer() returns the error LIBUSB_ERROR_NO_DEVICE. Maybe libusb_bulk_transfer() or libusb_submit_transfer() would check the USB device is still present. I can test patches. The problem is easy to reproduce for me. --=20 You are receiving this mail because: You are the assignee for the bug.=