From owner-svn-src-all@freebsd.org Tue Oct 20 08:34:03 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id DB45B429F00; Tue, 20 Oct 2020 08:34:03 +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 TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CFn3H5QMQz41Jv; Tue, 20 Oct 2020 08:34:03 +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 9D3641258F; Tue, 20 Oct 2020 08:34:03 +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 09K8Y3h0024623; Tue, 20 Oct 2020 08:34:03 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 09K8Y3kA024622; Tue, 20 Oct 2020 08:34:03 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <202010200834.09K8Y3kA024622@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Tue, 20 Oct 2020 08:34:03 +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: r366887 - stable/11/sys/dev/usb X-SVN-Group: stable-11 X-SVN-Commit-Author: hselasky X-SVN-Commit-Paths: stable/11/sys/dev/usb X-SVN-Commit-Revision: 366887 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: 2.1.33 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: Tue, 20 Oct 2020 08:34:03 -0000 Author: hselasky Date: Tue Oct 20 08:34:03 2020 New Revision: 366887 URL: https://svnweb.freebsd.org/changeset/base/366887 Log: MFC r366536: Try a bit harder to get the USB device descriptor in case the initial read fails. Sponsored by: Mellanox Technologies // NVIDIA Networking Modified: stable/11/sys/dev/usb/usb_request.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/usb/usb_request.c ============================================================================== --- stable/11/sys/dev/usb/usb_request.c Tue Oct 20 08:33:11 2020 (r366886) +++ stable/11/sys/dev/usb/usb_request.c Tue Oct 20 08:34:03 2020 (r366887) @@ -1970,9 +1970,23 @@ usbd_setup_device_desc(struct usb_device *udev, struct /* get partial device descriptor, some devices crash on this */ err = usbd_req_get_desc(udev, mtx, NULL, &udev->ddesc, USB_MAX_IPACKET, USB_MAX_IPACKET, 0, UDESC_DEVICE, 0, 0); - if (err != 0) - break; - + if (err != 0) { + DPRINTF("Trying fallback for getting the USB device descriptor\n"); + /* try 8 bytes bMaxPacketSize */ + udev->ddesc.bMaxPacketSize = 8; + /* get full device descriptor */ + err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc); + if (err == 0) + break; + /* try 16 bytes bMaxPacketSize */ + udev->ddesc.bMaxPacketSize = 16; + /* get full device descriptor */ + err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc); + if (err == 0) + break; + /* try 32/64 bytes bMaxPacketSize */ + udev->ddesc.bMaxPacketSize = 32; + } /* get the full device descriptor */ err = usbd_req_get_device_desc(udev, mtx, &udev->ddesc); break;