From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933515Ab1JNV7r (ORCPT ); Fri, 14 Oct 2011 17:59:47 -0400 Received: from mail09.linbit.com ([212.69.161.110]:60876 "EHLO mail09.linbit.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756989Ab1JNV54 (ORCPT ); Fri, 14 Oct 2011 17:57:56 -0400 From: Philipp Reisner To: linux-kernel@vger.kernel.org, Jens Axboe Cc: drbd-dev@lists.linbit.com Subject: [PATCH 05/11] drbd: Fix the maximum accepted minor device number Date: Fri, 14 Oct 2011 23:57:46 +0200 Message-Id: <1318629472-11110-6-git-send-email-philipp.reisner@linbit.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1318629472-11110-1-git-send-email-philipp.reisner@linbit.com> References: <1318629472-11110-1-git-send-email-philipp.reisner@linbit.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andreas Gruenbacher The maximum minor device number allowed by the kernel is (1<<20 - 1). Reject device numbers higher than that to earlier catch possible errors. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- include/linux/drbd_limits.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/include/linux/drbd_limits.h b/include/linux/drbd_limits.h index 9b76984..d3ec9cc 100644 --- a/include/linux/drbd_limits.h +++ b/include/linux/drbd_limits.h @@ -137,7 +137,7 @@ #define DRBD_AL_EXTENTS_SCALE '1' #define DRBD_MINOR_NUMBER_MIN -1 -#define DRBD_MINOR_NUMBER_MAX (1<<30) +#define DRBD_MINOR_NUMBER_MAX ((1 << 20) - 1) #define DRBD_MINOR_NUMBER_DEF -1 #define DRBD_MINOR_NUMBER_SCALE '1' -- 1.7.4.1