From owner-svn-src-all@freebsd.org Mon Jul 30 09:15:10 2018 Return-Path: Delivered-To: svn-src-all@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 36C6D104FC78; Mon, 30 Jul 2018 09:15:10 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id DF6D58EEFE; Mon, 30 Jul 2018 09:15:09 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id C0A542254D; Mon, 30 Jul 2018 09:15:09 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w6U9F9LF018252; Mon, 30 Jul 2018 09:15:09 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w6U9F9x5018251; Mon, 30 Jul 2018 09:15:09 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <201807300915.w6U9F9x5018251@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Mon, 30 Jul 2018 09:15:09 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r336883 - stable/11/lib/libusb X-SVN-Group: stable-11 X-SVN-Commit-Author: hselasky X-SVN-Commit-Paths: stable/11/lib/libusb X-SVN-Commit-Revision: 336883 X-SVN-Commit-Repository: base 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: 2.1.27 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, 30 Jul 2018 09:15:10 -0000 Author: hselasky Date: Mon Jul 30 09:15:09 2018 New Revision: 336883 URL: https://svnweb.freebsd.org/changeset/base/336883 Log: MFC r335669: Improve the userspace USB string reading function in LibUSB. Some USB devices does not allow a partial descriptor readout. Found by: bz @ Sponsored by: Mellanox Technologies Modified: stable/11/lib/libusb/libusb20.c Directory Properties: stable/11/ (props changed) Modified: stable/11/lib/libusb/libusb20.c ============================================================================== --- stable/11/lib/libusb/libusb20.c Mon Jul 30 07:01:00 2018 (r336882) +++ stable/11/lib/libusb/libusb20.c Mon Jul 30 09:15:09 2018 (r336883) @@ -812,6 +812,7 @@ libusb20_dev_req_string_sync(struct libusb20_device *p { struct LIBUSB20_CONTROL_SETUP_DECODED req; int error; + int flags; /* make sure memory is initialised */ memset(ptr, 0, len); @@ -838,22 +839,24 @@ libusb20_dev_req_string_sync(struct libusb20_device *p error = libusb20_dev_request_sync(pdev, &req, ptr, NULL, 1000, LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK); if (error) { - return (error); + /* try to request full string */ + req.wLength = 255; + flags = 0; + } else { + /* extract length and request full string */ + req.wLength = *(uint8_t *)ptr; + flags = LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK; } - req.wLength = *(uint8_t *)ptr; /* bytes */ if (req.wLength > len) { /* partial string read */ req.wLength = len; } - error = libusb20_dev_request_sync(pdev, &req, - ptr, NULL, 1000, LIBUSB20_TRANSFER_SINGLE_SHORT_NOT_OK); - - if (error) { + error = libusb20_dev_request_sync(pdev, &req, ptr, NULL, 1000, flags); + if (error) return (error); - } - if (((uint8_t *)ptr)[1] != LIBUSB20_DT_STRING) { + + if (((uint8_t *)ptr)[1] != LIBUSB20_DT_STRING) return (LIBUSB20_ERROR_OTHER); - } return (0); /* success */ }