From patchwork Thu Jul 13 14:57:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 702841 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 221C6C001E0 for ; Thu, 13 Jul 2023 15:01:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232469AbjGMPB2 (ORCPT ); Thu, 13 Jul 2023 11:01:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232429AbjGMPB1 (ORCPT ); Thu, 13 Jul 2023 11:01:27 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0B0919B4; Thu, 13 Jul 2023 08:01:25 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 41415617F1; Thu, 13 Jul 2023 15:01:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92B0FC433C8; Thu, 13 Jul 2023 15:01:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1689260484; bh=TXCscstt8foR9MlhQdbRGwgR6LOhBKjV5Dq6e0YdGzg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rtPSscpQZY5IXoful4VY2d0tMiTOAdnUh594RSMwcMQ8Xsy+TMfdvVkKZLYCUWuOd JJho1LWExjZmgiUZ445ECHLsDA5u+ULXOwfGmF3zn9xSrawoNYCZFw17+yPj7ups/V Fe0GxB2XF9dMAo/SvBFYCWr2IOxtgqZTuEREVZQdXxZHdBoAkHmqY6lAmlKPGVUefI yzfHdBjAEngDnlofRbx2+tTnVwQ0zRIJBZ6FSSUt6UgD17ccpfve6nD9PvxS1qNIhx 1PXq9oDDeU02eHj0wQ9YRjBmglrGcmpvAOFc7j3a4Rc59IkOoyL40EMyG+qg+kS0yd jMtx2sWBvqZeg== Received: from johan by xi.lan with local (Exim 4.96) (envelope-from ) id 1qJxor-0007vk-0R; Thu, 13 Jul 2023 17:01:25 +0200 From: Johan Hovold To: "Rafael J. Wysocki" , Greg Kroah-Hartman Cc: Pavel Machek , Len Brown , Andy Gross , Bjorn Andersson , Konrad Dybcio , Jiri Slaby , Tony Lindgren , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, Johan Hovold , stable@vger.kernel.org Subject: [PATCH 1/3] PM / wakeirq: fix wake irq arming Date: Thu, 13 Jul 2023 16:57:39 +0200 Message-ID: <20230713145741.30390-2-johan+linaro@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230713145741.30390-1-johan+linaro@kernel.org> References: <20230713145741.30390-1-johan+linaro@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The decision whether to enable a wake irq during suspend can not be done based on the runtime PM state directly as a driver may use wake irqs without implementing runtime PM. Such drivers specifically leave the state set to the default 'suspended' and the wake irq is thus never enabled at suspend. Add a new wake irq flag to track whether a dedicated wake irq has been enabled at runtime suspend and therefore must not be enabled at system suspend. Note that pm_runtime_enabled() can not be used as runtime PM is always disabled during late suspend. Fixes: 69728051f5bf ("PM / wakeirq: Fix unbalanced IRQ enable for wakeirq") Cc: stable@vger.kernel.org # 4.16 Cc: Tony Lindgren Signed-off-by: Johan Hovold --- drivers/base/power/power.h | 1 + drivers/base/power/wakeirq.c | 12 ++++++++---- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h index 0eb7f02b3ad5..922ed457db19 100644 --- a/drivers/base/power/power.h +++ b/drivers/base/power/power.h @@ -29,6 +29,7 @@ extern u64 pm_runtime_active_time(struct device *dev); #define WAKE_IRQ_DEDICATED_MASK (WAKE_IRQ_DEDICATED_ALLOCATED | \ WAKE_IRQ_DEDICATED_MANAGED | \ WAKE_IRQ_DEDICATED_REVERSE) +#define WAKE_IRQ_DEDICATED_ENABLED BIT(3) struct wake_irq { struct device *dev; diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c index d487a6bac630..afd094dec5ca 100644 --- a/drivers/base/power/wakeirq.c +++ b/drivers/base/power/wakeirq.c @@ -314,8 +314,10 @@ void dev_pm_enable_wake_irq_check(struct device *dev, return; enable: - if (!can_change_status || !(wirq->status & WAKE_IRQ_DEDICATED_REVERSE)) + if (!can_change_status || !(wirq->status & WAKE_IRQ_DEDICATED_REVERSE)) { enable_irq(wirq->irq); + wirq->status |= WAKE_IRQ_DEDICATED_ENABLED; + } } /** @@ -336,8 +338,10 @@ void dev_pm_disable_wake_irq_check(struct device *dev, bool cond_disable) if (cond_disable && (wirq->status & WAKE_IRQ_DEDICATED_REVERSE)) return; - if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED) + if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED) { + wirq->status &= ~WAKE_IRQ_DEDICATED_ENABLED; disable_irq_nosync(wirq->irq); + } } /** @@ -376,7 +380,7 @@ void dev_pm_arm_wake_irq(struct wake_irq *wirq) if (device_may_wakeup(wirq->dev)) { if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED && - !pm_runtime_status_suspended(wirq->dev)) + !(wirq->status & WAKE_IRQ_DEDICATED_ENABLED)) enable_irq(wirq->irq); enable_irq_wake(wirq->irq); @@ -399,7 +403,7 @@ void dev_pm_disarm_wake_irq(struct wake_irq *wirq) disable_irq_wake(wirq->irq); if (wirq->status & WAKE_IRQ_DEDICATED_ALLOCATED && - !pm_runtime_status_suspended(wirq->dev)) + !(wirq->status & WAKE_IRQ_DEDICATED_ENABLED)) disable_irq_nosync(wirq->irq); } }