From patchwork Thu Feb 21 07:46:49 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chengguang Xu X-Patchwork-Id: 10823261 X-Patchwork-Delegate: atull@kernel.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7FC971390 for ; Thu, 21 Feb 2019 07:47:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6A02D2EE39 for ; Thu, 21 Feb 2019 07:47:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5C6142EE3F; Thu, 21 Feb 2019 07:47:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,FREEMAIL_FROM, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D69C22EE39 for ; Thu, 21 Feb 2019 07:47:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725850AbfBUHrk (ORCPT ); Thu, 21 Feb 2019 02:47:40 -0500 Received: from mout.gmx.net ([212.227.17.22]:60155 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725648AbfBUHrk (ORCPT ); Thu, 21 Feb 2019 02:47:40 -0500 Received: from localhost.localdomain ([218.18.229.179]) by mail.gmx.com (mrgmx102 [212.227.17.174]) with ESMTPSA (Nemesis) id 0MMHaL-1gy5SD2uQ1-0083mH; Thu, 21 Feb 2019 08:47:33 +0100 From: Chengguang Xu To: hao.wu@intel.com, atull@kernel.org, mdf@kernel.org Cc: linux-fpga@vger.kernel.org, Chengguang Xu Subject: [PATCH v2] fpga: dfl: expand minor range when registering chrdev region Date: Thu, 21 Feb 2019 15:46:49 +0800 Message-Id: <20190221074649.28988-1-cgxu519@gmx.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Provags-ID: V03:K1:Rd2/AWhvQEX/p5uEvNSw06lMG4/VssQ1rC8OeDwm63JPFQ/H9Lo kTcbcJ5xNJhLsSCzVQARB79NGzmK1zEsVSQupM0P8z8H1ES1XILlzpVGHd8Bw3q8RBqG7Wl wkywU2v9qoOybxXMF3KrMjnj2vRO5rE+Q9WnHWVtftKz38hKbkqt10W/+hsT0r0mIrl8x0A N1fFx6KtXX/d5Vs8fR1qQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:EbTTq1jCQx0=:tgCo+Z8GwZ3njNoTB5nMh8 SsVx6B5BijVv/Vkvt8uN6Yj4QBcJNHr79pA+T+qXYDS/vvq2XDxdL+LEAN3s4cKl8tmJXZrw8 Xcu0LG5TSGL77va4Z6wQkxV7+j9e+DeZ0xIiAs9hqjE7fq1dtZMWOuxXOkqyuKCETQ7M6pqGr PUnqmqkJWiiWyltQMOgSPTpDusYM6IJM5mDuzkLmh6Lc2gTXhmq51Y2XP0z2+ZrCrifZvxnaX NkYZVkiB4GA/yFb/TaAo5OHV/c/QVPbb7PfbcetTso0rorC5nFDNjA8ruhe/DDG0AsaWiQFYt 0YJyMeGCE/4JK3GQ2/6fAjR8f2nLN2eDVFBaDEzJKVRv7q4lzAD/NX/77Uw19Me+MMTovE3HR +YgTHsUyyx/PKhEm3H2o5Ke6m7Dp9owLcSpRoSw2hERxP1OmeT7/Hhxl7R4M63/6y6YpGeeUV 7U9rv4AcNWwi4NyL1WMlVzhPVR/U5cK//geDJXLbgtKaFKeNXUc+4mJboHsGZUAWfD9Fesuvy rF/yOUNMyekCBmgDUsE8Zu+el9DqlX+iUOtWNgA/nsZV8Pui0vGwltrqUBgRaBFcWWbPcinLb IrqbWUWnDv1amdIZm4Iy/9CIGtaJ7XXhsGczJF+lZQ17iDeS06XYgeqXMPWRUlR/jr6nCBGds PJOhWgPSQqmDXekRRX6tBxBWSxlAts+oAdEi8z+fuAu7yMGKV1EFd0BpZg8dJxv5oYmwp4Wqo /u6Pow2XF72IKDbh+VZ1p43u2EYixPqFt0b3GkwK0bSkc67dBlLJuenTMPReLbkX+y4wdBcNc IXgYzm6HHfnrTvQ+L4tC/5ux6DWbxMJnViiGb8Wt8s6K9NdcW4bvoN9WaFShZazpCW8iQQdF1 WzhqF3wBz37boEjpW/A1T/ZRxuSoHIqjwOVhYxG8NxaEw6mOPKsslGoWlMiQ3H Sender: linux-fpga-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Actually, total amount of available minor number for a single major is MINORMASK + 1. So expand minor range when registering chrdev region. Signed-off-by: Chengguang Xu Acked-by: Wu Hao --- v1->v2: - Fix typo in subject. drivers/fpga/dfl.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index 2c09e502e721..02fff566be46 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -315,7 +315,7 @@ static void dfl_chardev_uinit(void) for (i = 0; i < DFL_FPGA_DEVT_MAX; i++) if (MAJOR(dfl_chrdevs[i].devt)) { unregister_chrdev_region(dfl_chrdevs[i].devt, - MINORMASK); + MINORMASK + 1); dfl_chrdevs[i].devt = MKDEV(0, 0); } } @@ -325,8 +325,8 @@ static int dfl_chardev_init(void) int i, ret; for (i = 0; i < DFL_FPGA_DEVT_MAX; i++) { - ret = alloc_chrdev_region(&dfl_chrdevs[i].devt, 0, MINORMASK, - dfl_chrdevs[i].name); + ret = alloc_chrdev_region(&dfl_chrdevs[i].devt, 0, + MINORMASK + 1, dfl_chrdevs[i].name); if (ret) goto exit; }