From owner-svn-src-head@freebsd.org Thu Oct 8 11:30:23 2020 Return-Path: Delivered-To: svn-src-head@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 1A8F53FD83F; Thu, 8 Oct 2020 11:30:23 +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 4C6TXG71qgz3fSk; Thu, 8 Oct 2020 11:30:22 +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 D484D27971; Thu, 8 Oct 2020 11:30:22 +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 098BUMuj006775; Thu, 8 Oct 2020 11:30:22 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 098BUMe9006774; Thu, 8 Oct 2020 11:30:22 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <202010081130.098BUMe9006774@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Thu, 8 Oct 2020 11:30:22 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r366536 - head/sys/dev/usb X-SVN-Group: head X-SVN-Commit-Author: hselasky X-SVN-Commit-Paths: head/sys/dev/usb X-SVN-Commit-Revision: 366536 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Oct 2020 11:30:23 -0000 Author: hselasky Date: Thu Oct 8 11:30:22 2020 New Revision: 366536 URL: https://svnweb.freebsd.org/changeset/base/366536 Log: Try a bit harder to get the USB device descriptor in case the initial read fails. MFC after: 1 week Sponsored by: Mellanox Technologies // NVIDIA Networking Modified: head/sys/dev/usb/usb_request.c Modified: head/sys/dev/usb/usb_request.c ============================================================================== --- head/sys/dev/usb/usb_request.c Thu Oct 8 11:25:19 2020 (r366535) +++ head/sys/dev/usb/usb_request.c Thu Oct 8 11:30:22 2020 (r366536) @@ -1973,9 +1973,23 @@ 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;