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=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 46CD5C433DF for ; Mon, 17 Aug 2020 19:14:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A6EA2072E for ; Mon, 17 Aug 2020 19:14:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597691681; bh=tUyQ7JpyxQCiTaMfaKNXuEnfPYLvnXB2tbmFxJwSzBg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=BynvEh85bz/4VUvCzinwvH/jfCon6g0kxI7r3y/Txs+V4FFxVpIb9Di+zhJUMaNQo KtTaO439/8iiJIcXWWQOH/kqKm+87fmwSyVFRATNIYF4BQB/0T1i5lrvnd6O8+fskw DRNQOqwUNOxurTriPtGkOtHVI51qHY6msFCK+RyM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392154AbgHQTOi (ORCPT ); Mon, 17 Aug 2020 15:14:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:48708 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387472AbgHQPkM (ORCPT ); Mon, 17 Aug 2020 11:40:12 -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 B62A423121; Mon, 17 Aug 2020 15:39:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597678798; bh=tUyQ7JpyxQCiTaMfaKNXuEnfPYLvnXB2tbmFxJwSzBg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PhQQrwaP/hfWguynCa25WNPv5Q+NSqTzz+m4Ka+g17mh5sbekCGVNQPEOsTHEBmtZ 1NVe7rlao1y5zf76OEp0eKCOi/UQNpVeEq1PgTXENILrd/aHQnwSQyFcxGbMCfizSI Y/3nkVt1dKM7IicOpj/c7O1IQiAZUrUKryQd7xj0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Elliot Berman , Jonathan McDowell , Bjorn Andersson Subject: [PATCH 5.8 450/464] firmware: qcom_scm: Fix legacy convention SCM accessors Date: Mon, 17 Aug 2020 17:16:43 +0200 Message-Id: <20200817143855.321195613@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817143833.737102804@linuxfoundation.org> References: <20200817143833.737102804@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jonathan McDowell commit b88c28280c3f7097546db93824686db1e7dceee1 upstream. The move to a combined driver for the QCOM SCM hardware changed the io_writel and io_readl helpers to use non-atomic calls, despite the commit message saying that atomic was a better option. This breaks these helpers on hardware that uses the old legacy convention (access fails with a -95 return code). Switch back to using the atomic calls. Observed as a failure routing GPIO interrupts to the Apps processor on an IPQ8064; fix is confirmed as correctly allowing the interrupts to be routed and observed. Reviewed-by: Elliot Berman Fixes: 57d3b816718c ("firmware: qcom_scm: Remove thin wrappers") Cc: stable@vger.kernel.org Signed-off-by: Jonathan McDowell Link: https://lore.kernel.org/r/20200704172334.GA759@earth.li Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman --- drivers/firmware/qcom_scm.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -391,7 +391,7 @@ static int __qcom_scm_set_dload_mode(str desc.args[1] = enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0; - return qcom_scm_call(__scm->dev, &desc, NULL); + return qcom_scm_call_atomic(__scm->dev, &desc, NULL); } static void qcom_scm_set_download_mode(bool enable) @@ -650,7 +650,7 @@ int qcom_scm_io_readl(phys_addr_t addr, int ret; - ret = qcom_scm_call(__scm->dev, &desc, &res); + ret = qcom_scm_call_atomic(__scm->dev, &desc, &res); if (ret >= 0) *val = res.result[0]; @@ -669,8 +669,7 @@ int qcom_scm_io_writel(phys_addr_t addr, .owner = ARM_SMCCC_OWNER_SIP, }; - - return qcom_scm_call(__scm->dev, &desc, NULL); + return qcom_scm_call_atomic(__scm->dev, &desc, NULL); } EXPORT_SYMBOL(qcom_scm_io_writel);