From patchwork Wed Nov 27 19:06:48 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felipe Balbi X-Patchwork-Id: 3249651 Return-Path: X-Original-To: patchwork-linux-arm@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 CD009C045B for ; Wed, 27 Nov 2013 19:51:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C9220203EC for ; Wed, 27 Nov 2013 19:51:22 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8E109203E3 for ; Wed, 27 Nov 2013 19:51:21 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VlkV7-0005SD-Lc; Wed, 27 Nov 2013 19:10:18 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VlkUP-0007WX-Ew; Wed, 27 Nov 2013 19:09:33 +0000 Received: from bear.ext.ti.com ([192.94.94.41]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VlkT4-0007Jo-W4 for linux-arm-kernel@lists.infradead.org; Wed, 27 Nov 2013 19:08:20 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id rARJ7ah2023527; Wed, 27 Nov 2013 13:07:36 -0600 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id rARJ7aWh031338; Wed, 27 Nov 2013 13:07:36 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.2.342.3; Wed, 27 Nov 2013 13:07:36 -0600 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id rARJ7ZGv012434; Wed, 27 Nov 2013 13:07:36 -0600 From: Felipe Balbi To: Subject: [PATCH 04/13] mfd: menelaus: remove unnecessary loop Date: Wed, 27 Nov 2013 13:06:48 -0600 Message-ID: <1385579217-20127-5-git-send-email-balbi@ti.com> X-Mailer: git-send-email 1.8.4.GIT In-Reply-To: <1385579217-20127-1-git-send-email-balbi@ti.com> References: <1385579217-20127-1-git-send-email-balbi@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131127_140811_484300_3E48AF45 X-CRM114-Status: GOOD ( 12.06 ) X-Spam-Score: -6.9 (------) Cc: Aaro Koskinen , Tony Lindgren , Linux Kernel Mailing List , Felipe Balbi , Linux OMAP Mailing List , lee.jones@linaro.org, Linux ARM Kernel Mailing List X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 we can let irqs refire and give the scheduler a chance to choose when we should be scheduled. Signed-off-by: Felipe Balbi --- drivers/mfd/menelaus.c | 43 +++++++++++++++++++------------------------ 1 file changed, 19 insertions(+), 24 deletions(-) diff --git a/drivers/mfd/menelaus.c b/drivers/mfd/menelaus.c index 11d7d81..11dc4d3 100644 --- a/drivers/mfd/menelaus.c +++ b/drivers/mfd/menelaus.c @@ -795,30 +795,25 @@ static irqreturn_t menelaus_irq(int irq, void *_menelaus) { struct menelaus_chip *menelaus = _menelaus; void (*handler)(struct menelaus_chip *menelaus); - - while (1) { - unsigned isr; - - isr = (menelaus_read_reg(MENELAUS_INT_STATUS2) - & ~menelaus->mask2) << 8; - isr |= menelaus_read_reg(MENELAUS_INT_STATUS1) - & ~menelaus->mask1; - if (!isr) - break; - - while (isr) { - int irq = fls(isr) - 1; - isr &= ~(1 << irq); - - mutex_lock(&menelaus->lock); - menelaus_disable_irq(irq); - menelaus_ack_irq(irq); - handler = menelaus->handlers[irq]; - if (handler) - handler(menelaus); - menelaus_enable_irq(irq); - mutex_unlock(&menelaus->lock); - } + unsigned isr; + + isr = (menelaus_read_reg(MENELAUS_INT_STATUS2) + & ~menelaus->mask2) << 8; + isr |= menelaus_read_reg(MENELAUS_INT_STATUS1) + & ~menelaus->mask1; + + while (isr) { + int irq = fls(isr) - 1; + isr &= ~(1 << irq); + + mutex_lock(&menelaus->lock); + menelaus_disable_irq(irq); + menelaus_ack_irq(irq); + handler = menelaus->handlers[irq]; + if (handler) + handler(menelaus); + menelaus_enable_irq(irq); + mutex_unlock(&menelaus->lock); } return IRQ_HANDLED;