From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0EFAEC10F14 for ; Thu, 3 Oct 2019 17:18:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D947420830 for ; Thu, 3 Oct 2019 17:18:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570123130; bh=DWNzfLJ61MFerPbmG0E1WG/O8uncf6ZwntcksS8TIQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=SuMoEjyvVY+3D5oYZGGW5hErzX0Is6P+iQMN1tYAZtW3pcw60vLz+QLIY5hw6deYT FFFAepABsMEBhUsT/oRA/ma1u1pMM6QpKwpbN3M+6KTsEvC8J/v2Zm98fMWn670+Ru tJYTcrY6uxkqN1pCL06RNQ5gC3i+8VwTtNXg1hbE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389931AbfJCQUe (ORCPT ); Thu, 3 Oct 2019 12:20:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:48228 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732597AbfJCQUb (ORCPT ); Thu, 3 Oct 2019 12:20:31 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C9E6720865; Thu, 3 Oct 2019 16:20:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570119630; bh=DWNzfLJ61MFerPbmG0E1WG/O8uncf6ZwntcksS8TIQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VRMzGFRN5mYsANSMvD3kQr2jiOK/uNlSlrT9HrsjDYLM4kdvnQm9XpXSEk9QhX1bP 8/qceJmtVZqm+tdYyJUUeBUJYA8zDbXtLy9CvW9RkZylY7eZAXShNdT0zi4R3rXWex Hk7Q9kE/2jFlOcYmH7E6OZfqUBCs2NHwNkBEy2Vw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Matthias Kaehlcke , Ulf Hansson , Douglas Anderson , Sasha Levin Subject: [PATCH 4.19 135/211] mmc: core: Add helper function to indicate if SDIO IRQs is enabled Date: Thu, 3 Oct 2019 17:53:21 +0200 Message-Id: <20191003154517.961917276@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191003154447.010950442@linuxfoundation.org> References: <20191003154447.010950442@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ulf Hansson [ Upstream commit bd880b00697befb73eff7220ee20bdae4fdd487b ] To avoid each host driver supporting SDIO IRQs, from keeping track internally about if SDIO IRQs has been claimed, let's introduce a common helper function, sdio_irq_claimed(). The function returns true if SDIO IRQs are claimed, via using the information about the number of claimed irqs. This is safe, even without any locks, as long as the helper function is called only from runtime/system suspend callbacks of the host driver. Tested-by: Matthias Kaehlcke Signed-off-by: Ulf Hansson Reviewed-by: Douglas Anderson Signed-off-by: Ulf Hansson Signed-off-by: Sasha Levin --- include/linux/mmc/host.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 2ff52de1c2b89..840462ed1ec7e 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -488,6 +488,15 @@ void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq); void mmc_cqe_request_done(struct mmc_host *host, struct mmc_request *mrq); +/* + * May be called from host driver's system/runtime suspend/resume callbacks, + * to know if SDIO IRQs has been claimed. + */ +static inline bool sdio_irq_claimed(struct mmc_host *host) +{ + return host->sdio_irqs > 0; +} + static inline void mmc_signal_sdio_irq(struct mmc_host *host) { host->ops->enable_sdio_irq(host, 0); -- 2.20.1