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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 E716EC4740C for ; Sun, 22 Sep 2019 19:31:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B47E2206B6 for ; Sun, 22 Sep 2019 19:31:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569180681; bh=HiwsV5TpdnN+VgtHgx7ikNQaIghLwyuaB9/PgqbRLeY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DAfHuwmDOVZvMEE0yXyfxmJMuZP8ylxutR14gunYQKlpiXTQlhflk6bYdftX7aJec 7xGj30Ei1MidigHVAPRv5xBRjxw3NMoR4KKE4bbpHtsZGEaIvcfDCkMFHrnBjx9Ed2 DmbR41LCYXoPOvZMPeEb1sFS4EiDUxOIPyFY4NYA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391838AbfIVSsx (ORCPT ); Sun, 22 Sep 2019 14:48:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:45848 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391825AbfIVSsx (ORCPT ); Sun, 22 Sep 2019 14:48:53 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 98316214AF; Sun, 22 Sep 2019 18:48:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569178132; bh=HiwsV5TpdnN+VgtHgx7ikNQaIghLwyuaB9/PgqbRLeY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fWyx95J7tzCOxV7moZzYxSgQXNazJ8cgRzJ2jkfXhmyNODsx0DgCQkAAPjMTyxPdN sdwAK0488rRcSxH9FebRHrAwqhLr7Spavvdea0pzBn/7fmrgZHOhOPcm2f/BjQYsM4 /m/eMutu3AqP9UGJ/VndvwMGAadNVHdfsXhh2UdE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Ulf Hansson , Matthias Kaehlcke , Douglas Anderson , Sasha Levin , linux-mmc@vger.kernel.org Subject: [PATCH AUTOSEL 5.3 184/203] mmc: core: Add helper function to indicate if SDIO IRQs is enabled Date: Sun, 22 Sep 2019 14:43:30 -0400 Message-Id: <20190922184350.30563-184-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190922184350.30563-1-sashal@kernel.org> References: <20190922184350.30563-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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 4a351cb7f20fc..cf87c673cbb81 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -493,6 +493,15 @@ 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