From patchwork Tue Jun 17 10:46:38 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Denis Carikli X-Patchwork-Id: 4365801 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8F30E9F36A for ; Tue, 17 Jun 2014 10:50:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E4BCC202AE for ; Tue, 17 Jun 2014 10:50:06 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2C1B72025B for ; Tue, 17 Jun 2014 10:50:03 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wwqvi-0000e3-VL; Tue, 17 Jun 2014 10:47:54 +0000 Received: from smtp6-g21.free.fr ([212.27.42.6]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1WwqvT-0000Rj-Jl for linux-arm-kernel@lists.infradead.org; Tue, 17 Jun 2014 10:47:43 +0000 Received: from denis-N73SV.local.eukrea.fr (unknown [88.170.243.169]) by smtp6-g21.free.fr (Postfix) with ESMTP id DD21C82283; Tue, 17 Jun 2014 12:46:46 +0200 (CEST) From: Denis Carikli To: Shawn Guo Subject: [PATCH 2/3] video: imxfb: Fix unbalanced regulators Date: Tue, 17 Jun 2014 12:46:38 +0200 Message-Id: <1403001999-12316-2-git-send-email-denis@eukrea.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1403001999-12316-1-git-send-email-denis@eukrea.com> References: <1403001999-12316-1-git-send-email-denis@eukrea.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140617_034739_799229_DCAF0DCA X-CRM114-Status: GOOD ( 11.19 ) X-Spam-Score: 1.0 (+) Cc: linux-arm-kernel@lists.infradead.org, Denis Carikli , Alexander Shiyan , Sascha Hauer , =?UTF-8?q?Eric=20B=C3=A9nard?= X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.9 required=5.0 tests=BAYES_00,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 Both regulator_enable and regulator_disable's comments say that they must be balanced with its counterpart enable/disable function. Not doing it result in kernel warnings each time the lcd is powered off twice, for instance trough sysfs. Signed-off-by: Denis Carikli --- drivers/video/fbdev/imxfb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/imxfb.c b/drivers/video/fbdev/imxfb.c index f6e6216..121cbd7 100644 --- a/drivers/video/fbdev/imxfb.c +++ b/drivers/video/fbdev/imxfb.c @@ -769,9 +769,9 @@ static int imxfb_lcd_set_power(struct lcd_device *lcddev, int power) struct imxfb_info *fbi = dev_get_drvdata(&lcddev->dev); if (!IS_ERR(fbi->lcd_pwr)) { - if (power) + if (power && !regulator_is_enabled(fbi->lcd_pwr)) return regulator_enable(fbi->lcd_pwr); - else + else if (regulator_is_enabled(fbi->lcd_pwr)) return regulator_disable(fbi->lcd_pwr); }