Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758661Ab1CaRA6 (ORCPT ); Thu, 31 Mar 2011 13:00:58 -0400 Received: from webhosting01.bon.m2soft.com ([195.38.20.32]:50494 "EHLO webhosting01.bon.m2soft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758428Ab1CaRA4 (ORCPT ); Thu, 31 Mar 2011 13:00:56 -0400 Date: Thu, 31 Mar 2011 18:55:52 +0200 From: Nicolas Kaiser To: Robert Richter Cc: Martin Schwidefsky , Heiko Carstens , linux390@de.ibm.com, oprofile-list@lists.sf.net, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] s390: oprofile: fix error checks in oprofile_hwsampler_init() Message-ID: <20110331185552.5f633573@absol.kitzblitz> Organization: - Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAAAXNSR0IArs4c6QAAAAZQTFRF AJnV/f/88sgWwwAAAKNJREFUGNM10LENwyAQheFHKCgZgTVSRHI2gy5reROTDSiREvnyHhdXnwXS+ T+ACJgBYTiGSmDDOTdR7XDeTi9ksxEcoKFcTOCJLO7kC5SWFjPZCR69nI9+x5u6OJM1RN5UYUiNKa ZRpHHUoqh1v8hKEZ1FSGCrYOvgVmxd9DIXcSJwLTycm7bj0e4wkJGB48w/FckAwUKl/OGDZAcqItk BU+wHXLqKsjYyPeMAAAAASUVORK5CYII= X-Mailer: Claws Mail (Linux) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1577 Lines: 53 Checking 'oprofile_min_interval < 0' and 'oprofile_max_interval < 0' doesn't work because 'oprofile_min_interval' and 'oprofile_max_interval' are unsigned. Signed-off-by: Nicolas Kaiser --- Untested. arch/s390/oprofile/init.c | 12 ++++++++---- 1 files changed, 8 insertions(+), 4 deletions(-) diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c index c63d7e5..09c3088 100644 --- a/arch/s390/oprofile/init.c +++ b/arch/s390/oprofile/init.c @@ -138,22 +138,26 @@ static int oprofile_create_hwsampling_files(struct super_block *sb, static int oprofile_hwsampler_init(struct oprofile_operations *ops) { + long retval; + if (hwsampler_setup()) return -ENODEV; /* * create hwsampler files only if hwsampler_setup() succeeds. */ - oprofile_min_interval = hwsampler_query_min_interval(); - if (oprofile_min_interval < 0) { + retval = hwsampler_query_min_interval(); + if (retval < 0) { oprofile_min_interval = 0; return -ENODEV; } - oprofile_max_interval = hwsampler_query_max_interval(); - if (oprofile_max_interval < 0) { + oprofile_min_interval = retval; + retval = hwsampler_query_max_interval(); + if (retval < 0) { oprofile_max_interval = 0; return -ENODEV; } + oprofile_max_interval = retval; if (oprofile_timer_init(ops)) return -ENODEV; -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/