From patchwork Mon Jun 16 11:23:14 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: R Sricharan X-Patchwork-Id: 4358111 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 644F3BEEAA for ; Mon, 16 Jun 2014 11:28:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9F01F201E4 for ; Mon, 16 Jun 2014 11:28:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BBABA20176 for ; Mon, 16 Jun 2014 11:28:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751679AbaFPL1t (ORCPT ); Mon, 16 Jun 2014 07:27:49 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:41738 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752066AbaFPL0v (ORCPT ); Mon, 16 Jun 2014 07:26:51 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id s5GBQMpF019438; Mon, 16 Jun 2014 06:26:22 -0500 Received: from DLEE70.ent.ti.com (dlemailx.itg.ti.com [157.170.170.113]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id s5GBQMwf026531; Mon, 16 Jun 2014 06:26:22 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.174.1; Mon, 16 Jun 2014 06:26:22 -0500 Received: from uda0393807.india.ti.com. (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id s5GBOx4B008965; Mon, 16 Jun 2014 06:26:18 -0500 From: Sricharan R To: , , , CC: , , , , , , , , Subject: [PATCH V3 14/16] irqchip: crossbar: introduce centralized check for crossbar write Date: Mon, 16 Jun 2014 16:53:14 +0530 Message-ID: <1402917796-31574-15-git-send-email-r.sricharan@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1402917796-31574-1-git-send-email-r.sricharan@ti.com> References: <1402917796-31574-1-git-send-email-r.sricharan@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Nishanth Menon This is a basic check to ensure that crossbar register needs to be written. This ensures that we have a common check which is used in both map and unmap logic. Signed-off-by: Nishanth Menon Signed-off-by: Sricharan R --- drivers/irqchip/irq-crossbar.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c index c46e14b..ef613c4 100644 --- a/drivers/irqchip/irq-crossbar.c +++ b/drivers/irqchip/irq-crossbar.c @@ -84,10 +84,20 @@ static inline int allocate_free_irq(int cb_no) return -ENODEV; } +static inline bool needs_crossbar_write(irq_hw_number_t hw) +{ + if (hw > GIC_IRQ_START) + return true; + + return false; +} + static int crossbar_domain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { - cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]); + if (needs_crossbar_write(hw)) + cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]); + return 0; } @@ -106,7 +116,7 @@ static void crossbar_domain_unmap(struct irq_domain *d, unsigned int irq) { irq_hw_number_t hw = irq_get_irq_data(irq)->hwirq; - if (hw > GIC_IRQ_START) { + if (needs_crossbar_write(hw)) { cb->irq_map[hw - GIC_IRQ_START] = IRQ_FREE; cb->write(hw - GIC_IRQ_START, cb->safe_map); }