From patchwork Tue Feb 12 06:24:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chengguang Xu X-Patchwork-Id: 10807397 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 719C713B4 for ; Tue, 12 Feb 2019 06:25:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 55239299E7 for ; Tue, 12 Feb 2019 06:25:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 453C62AB26; Tue, 12 Feb 2019 06:25:30 +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 B5AFC299E7 for ; Tue, 12 Feb 2019 06:25:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725930AbfBLGZ3 (ORCPT ); Tue, 12 Feb 2019 01:25:29 -0500 Received: from mout.gmx.net ([212.227.17.22]:57043 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725916AbfBLGZ3 (ORCPT ); Tue, 12 Feb 2019 01:25:29 -0500 Received: from localhost.localdomain ([218.18.229.179]) by mail.gmx.com (mrgmx103 [212.227.17.174]) with ESMTPSA (Nemesis) id 0MTBfe-1gTU6p0ldu-00S9lz; Tue, 12 Feb 2019 07:25:22 +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] fpga: expand minor range when registering chrdev region Date: Tue, 12 Feb 2019 14:24:51 +0800 Message-Id: <20190212062451.1354-1-cgxu519@gmx.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Provags-ID: V03:K1:T5QMRe/qjtFVwIGyNkUOaQHzZmj4lD1JLlSwiiBiYEUKa5eG2hk jaWPq5+vB4lKOQDONrMEbY7/cfOi0KdFOwi4mQYblj2FoSn/MIl+tNK4e6VXW8ZXbv+yEw6 uK/YEqz4a3rTU40tgNsTGTCfMq9CIj4i8c/GM+pEKbQmVXtGLA9tS4Yq2CjWfhBHxLoXNru rAWU0WO/Kzr2MZzOureDQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:8mj7+JWeb5I=:zbV+2oWMay0NKEXC2SEul0 ROIAOBf7WRBZWmwpxWPaEO9rwXD/uRfoVf2U1hXl1PLKlAgoOVrN6XjdJOCZONMh0OkbfMswh pkKJRlbsN94JSIcVVMvuVsWsr9PMQ5JfgEdZNHnkNT65/4a5pNutqs5RRN0bfpqbiKz37qOVM TxOh4Jvobj8lU7DMvkyH6ovR48PkAq6dFnM6d3OKr/KtF2lR1HwXbVpNIXd65Z10w4GMRDwvt RUqhisiyc1rWiHxqpFg6SPZjzzo26AESrWx9an3K+7yTozOautpA4G3RvgC9LzR5cfiJxfyQY LnNHdVvgfgSNwz9f1qshGoSbQRedUBcp88t+4jZ4tGv0jHhXJwip4SKygNcjQ7B0bGw1fphHk wOsCb3sobkopalNK+8MQNS0Q7APYbTBRysHHlETNX2k4zyHzcdmPyErfTzd2WxwqIUX74cH22 6swgJIMUoywnh66dkFRT3Nz10wK9fpyY95zMR4/dPdvNjhIi2MFkh5eX1SWSDKiesDhAswlg9 feSsxpcecm7AlDsWMEpooeBevyM7sjsTLYPMAZ9vPge199jHr+Lio8wSlcAsOBzCkUdyGLkac kbxJa7BJ6bdCTX6QcqS0c1rcIASFzG+Db2hW6HZ8OpuSPECJFYNNNtUMTrnAtra4d+Qg5ltxw 8+WzYDwcmsp8gDdR88Ou9Z0NECRVkrSDOX78iEb6JJz4SXQ01pYe4G3jjeAVvGVII/9g213wh nypXU1jprIjHHMpB+5ZB+/xPJ5/bgVbZRpVZc912MTICN5CxmtRXPO0jQ8pFdeWxgG7qQ3DRE bpTVJIpL1uOd3IL4G6z4B2rBCtFrxGJDZsIGzZtdPXxnDQn2aaj51UDqrSO5iOTU2pqmk+t1j kgBXwudau0q0gBHSlHy5lm0mj4u3gzvKtdE/KOluxK74UkRmI9Y8JSwimtdKpi 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 MINORMARK + 1. So expand minor range when registering chrdev region. Signed-off-by: Chengguang Xu Acked-by: Wu Hao --- 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; }