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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 685B7C433ED for ; Wed, 12 May 2021 16:45:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2E712613BE for ; Wed, 12 May 2021 16:45:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241271AbhELQpT (ORCPT ); Wed, 12 May 2021 12:45:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:55246 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243266AbhELQhB (ORCPT ); Wed, 12 May 2021 12:37:01 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 802CD61E22; Wed, 12 May 2021 16:01:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620835317; bh=vNw7hPyriTF8vD1Ecj2og92mIOBMCxSbrMbzY/QIXHg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Vonc+JJ65qQRyWF+BdMUUInc9IgO8d3k+Xb8DVY5dmRMwwQU7040ujzWtiZlw6O+R AF4jZ7nQOW2cuouD1ZbY8qFSDCuC6qLImXmQhgoNdCLTOKySC/kJw3DosHzYqdtsuZ A4rQhhSt2mr0Gak6MkjodcavU8yb/d1MKZpW6TS0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Quanyang Wang , Amit Kumar Mahapatra , Mark Brown , Sasha Levin Subject: [PATCH 5.12 294/677] spi: spi-zynqmp-gqspi: add mutex locking for exec_op Date: Wed, 12 May 2021 16:45:40 +0200 Message-Id: <20210512144846.980133108@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Quanyang Wang [ Upstream commit a0f65be6e880a14d3445b75e7dc03d7d015fc922 ] The spi-mem framework has no locking to prevent ctlr->mem_ops->exec_op from concurrency. So add the locking to zynqmp_qspi_exec_op. Fixes: 1c26372e5aa9 ("spi: spi-zynqmp-gqspi: Update driver to use spi-mem framework") Signed-off-by: Quanyang Wang Reviewed-by: Amit Kumar Mahapatra Link: https://lore.kernel.org/r/20210408040223.23134-3-quanyang.wang@windriver.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-zynqmp-gqspi.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c index d49ab6575553..3b39461d58b3 100644 --- a/drivers/spi/spi-zynqmp-gqspi.c +++ b/drivers/spi/spi-zynqmp-gqspi.c @@ -173,6 +173,7 @@ struct zynqmp_qspi { u32 genfifoentry; enum mode_type mode; struct completion data_completion; + struct mutex op_lock; }; /** @@ -951,6 +952,7 @@ static int zynqmp_qspi_exec_op(struct spi_mem *mem, op->cmd.opcode, op->cmd.buswidth, op->addr.buswidth, op->dummy.buswidth, op->data.buswidth); + mutex_lock(&xqspi->op_lock); zynqmp_qspi_config_op(xqspi, mem->spi); zynqmp_qspi_chipselect(mem->spi, false); genfifoentry |= xqspi->genfifocs; @@ -1084,6 +1086,7 @@ static int zynqmp_qspi_exec_op(struct spi_mem *mem, return_err: zynqmp_qspi_chipselect(mem->spi, true); + mutex_unlock(&xqspi->op_lock); return err; } @@ -1156,6 +1159,8 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) goto clk_dis_pclk; } + mutex_init(&xqspi->op_lock); + pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT); pm_runtime_set_active(&pdev->dev); -- 2.30.2