From patchwork Tue Sep 29 18:32:46 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King X-Patchwork-Id: 7289511 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 92EC0BEEA4 for ; Tue, 29 Sep 2015 18:32:54 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C177A2068E for ; Tue, 29 Sep 2015 18:32:53 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id ECDF32053C for ; Tue, 29 Sep 2015 18:32:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5EECB6E697; Tue, 29 Sep 2015 11:32:51 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from pandora.arm.linux.org.uk (pandora.arm.linux.org.uk [78.32.30.218]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9AC7A6E697 for ; Tue, 29 Sep 2015 11:32:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=arm.linux.org.uk; s=pandora-2014; h=Date:Sender:Message-Id:Content-Type:Content-Transfer-Encoding:MIME-Version:Subject:To:From:References:In-Reply-To; bh=13eiDtrosM6te9PdHynIZzdWNS44bSI710JPiKEs/MQ=; b=DMdjvO50aulwVmqp/bTL6tbZI337pGulAqIxsmokw1SK3xRGSPW2EqkxwkRlrpG4QlaEDPRhoR1oP89vFXQ3IL2IDieqDQuuVA+JXdmLsr2hSKOS5gOjHkgXjesr4oNq2lAUWYVlgOJ5qJ92VhZKkoxfc6zBfIqxyG0r1Q2mF5k=; Received: from e0022681537dd.dyn.arm.linux.org.uk ([2001:4d48:ad52:3201:222:68ff:fe15:37dd]:55842 helo=rmk-PC.arm.linux.org.uk) by pandora.arm.linux.org.uk with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1Zgzhn-0004WF-3V for dri-devel@lists.freedesktop.org; Tue, 29 Sep 2015 19:32:47 +0100 Received: from rmk by rmk-PC.arm.linux.org.uk with local (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1Zgzhm-00042J-AM for dri-devel@lists.freedesktop.org; Tue, 29 Sep 2015 19:32:46 +0100 In-Reply-To: <20150929183216.GQ21513@n2100.arm.linux.org.uk> References: <20150929183216.GQ21513@n2100.arm.linux.org.uk> From: Russell King To: dri-devel@lists.freedesktop.org Subject: [PATCH 02/11] drm/i2c: tda998x: report whether we actually handled the IRQ MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Tue, 29 Sep 2015 19:32:46 +0100 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_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 Rather than always reporting that the interrupt was handled, we should report whether we did handle the interrupt. Arrange to report IRQ_NONE for cases where we found nothing to do. This allows us to (eventually) recover from stuck-IRQ problems, rather than causing the kernel to solidly lock up. Signed-off-by: Russell King --- drivers/gpu/drm/i2c/tda998x_drv.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c index d8e97085f866..ad3ce3479edf 100644 --- a/drivers/gpu/drm/i2c/tda998x_drv.c +++ b/drivers/gpu/drm/i2c/tda998x_drv.c @@ -569,6 +569,7 @@ static irqreturn_t tda998x_irq_thread(int irq, void *data) { struct tda998x_priv *priv = data; u8 sta, cec, lvl, flag0, flag1, flag2; + bool handled = false; sta = cec_read(priv, REG_CEC_INTSTATUS); cec = cec_read(priv, REG_CEC_RXSHPDINT); @@ -582,10 +583,12 @@ static irqreturn_t tda998x_irq_thread(int irq, void *data) if ((flag2 & INT_FLAGS_2_EDID_BLK_RD) && priv->wq_edid_wait) { priv->wq_edid_wait = 0; wake_up(&priv->wq_edid); + handled = true; } else if (cec != 0) { /* HPD change */ schedule_delayed_work(&priv->dwork, HZ/10); + handled = true; } - return IRQ_HANDLED; + return IRQ_RETVAL(handled); } static uint8_t tda998x_cksum(uint8_t *buf, size_t bytes)