Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751593AbbEFVln (ORCPT ); Wed, 6 May 2015 17:41:43 -0400 Received: from mail-bn1on0114.outbound.protection.outlook.com ([157.56.110.114]:26448 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751034AbbEFVli (ORCPT ); Wed, 6 May 2015 17:41:38 -0400 Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=yorksun@freescale.com; Message-ID: <554A8A8B.1020703@freescale.com> Date: Wed, 6 May 2015 14:41:31 -0700 From: York Sun User-Agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Lee Jones CC: , , , Subject: Why isn't IRQ shared for i2c-ocore References: <55304D8E.8070204@freescale.com> <55312AF7.7070504@freescale.com> <20150420064231.GE3447@x1> <55352839.70905@freescale.com> <20150420181651.GF3447@x1> <5535460B.2060309@freescale.com> <20150421073534.GK3447@x1> In-Reply-To: <20150421073534.GK3447@x1> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [192.88.168.50] X-ClientProxiedBy: BLUPR08CA0034.namprd08.prod.outlook.com (10.141.200.14) To BLUPR03MB152.namprd03.prod.outlook.com (10.255.212.28) X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:BLUPR03MB152; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:(601004)(5005006)(3002001);SRVR:BLUPR03MB152;BCL:0;PCL:0;RULEID:;SRVR:BLUPR03MB152; X-Forefront-PRVS: 0568F32D91 X-Forefront-Antispam-Report: SFV:NSPM;SFS:(10019020)(979002)(6049001)(6009001)(65806001)(65816999)(65956001)(2950100001)(87976001)(106356001)(558084003)(80316001)(83506001)(122386002)(33656002)(92566002)(64706001)(86362001)(50466002)(189998001)(64126003)(66066001)(54356999)(4001350100001)(46102003)(47776003)(87266999)(42186005)(93886004)(5001920100001)(77156002)(76176999)(5001960100002)(23676002)(50986999)(62966003)(59896002)(229853001)(40100003)(77096005)(36756003)(110136002)(969003)(989001)(999001)(1009001)(1019001);DIR:OUT;SFP:1102;SCL:1;SRVR:BLUPR03MB152;H:[10.214.84.139];FPR:;SPF:None;MLV:ovrnspm;PTR:InfoNoRecords;LANG:en; X-OriginatorOrg: freescale.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 May 2015 21:41:34.6801 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLUPR03MB152 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 520 Lines: 14 Lee, I have a follow up question regarding interrupt. I see many I2C bus drivers request interrupt with flag = 0. Why not using IRQF_SHARED? I understand the performance concern. If there is any other reason, I want to know about it before I go too far on my driver. York -- 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/