From owner-svn-src-all@FreeBSD.ORG Mon Oct 6 06:08:30 2014 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 951FB425; Mon, 6 Oct 2014 06:08:30 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 6693923C; Mon, 6 Oct 2014 06:08:30 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id s9668UjR070963; Mon, 6 Oct 2014 06:08:30 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id s9668UgL070962; Mon, 6 Oct 2014 06:08:30 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <201410060608.s9668UgL070962@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Mon, 6 Oct 2014 06:08:30 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r272594 - stable/8/sys/dev/usb X-SVN-Group: stable-8 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Oct 2014 06:08:30 -0000 Author: hselasky Date: Mon Oct 6 06:08:29 2014 New Revision: 272594 URL: https://svnweb.freebsd.org/changeset/base/272594 Log: MFC r272480: When we fail to get a USB reference we should just return, because there are no more references held. Modified: stable/8/sys/dev/usb/usb_dev.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/dev/ (props changed) stable/8/sys/dev/usb/ (props changed) Modified: stable/8/sys/dev/usb/usb_dev.c ============================================================================== --- stable/8/sys/dev/usb/usb_dev.c Mon Oct 6 06:07:02 2014 (r272593) +++ stable/8/sys/dev/usb/usb_dev.c Mon Oct 6 06:08:29 2014 (r272594) @@ -293,6 +293,10 @@ error: } mtx_unlock(&usb_ref_lock); DPRINTFN(2, "fail\n"); + + /* clear all refs */ + memset(crd, 0, sizeof(*crd)); + return (USB_ERR_INVAL); } @@ -1079,8 +1083,8 @@ usb_ioctl(struct cdev *dev, u_long cmd, goto done; if (usb_usb_ref_device(cpd, &refs)) { - err = ENXIO; - goto done; + /* we lost the reference */ + return (ENXIO); } err = (f->methods->f_ioctl_post) (f, cmd, addr, fflags); @@ -1103,9 +1107,8 @@ usb_ioctl(struct cdev *dev, u_long cmd, while (usb_ref_device(cpd, &refs, 1 /* need uref */)) { if (usb_ref_device(cpd, &refs, 0)) { - /* device no longer exits */ - err = ENXIO; - goto done; + /* device no longer exists */ + return (ENXIO); } usb_unref_device(cpd, &refs); usb_pause_mtx(NULL, hz / 128); @@ -1241,9 +1244,9 @@ usb_read(struct cdev *dev, struct uio *u return (err); err = usb_ref_device(cpd, &refs, 0 /* no uref */ ); - if (err) { + if (err) return (ENXIO); - } + fflags = cpd->fflags; f = refs.rxfifo; @@ -1367,9 +1370,9 @@ usb_write(struct cdev *dev, struct uio * return (err); err = usb_ref_device(cpd, &refs, 0 /* no uref */ ); - if (err) { + if (err) return (ENXIO); - } + fflags = cpd->fflags; f = refs.txfifo;