From patchwork Tue Sep 1 15:10:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 310322 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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 EB592C433E2 for ; Tue, 1 Sep 2020 16:33:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CC897207D3 for ; Tue, 1 Sep 2020 16:33:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598978027; bh=XLPcl2FH3swdl5UwvcCQtT2pdcZTolwEr4lc6czp6xU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=oID49e+wp4x1B359JpOROH3KQ9QkvlYFETpyTIZiazJ6HxRHlZ0qDItQXFKegRQJo NDu+GJ8q7vVr2kAcIjfwC4CNFzyX7KSPrXGmX/jQ9IUPJA9TU9R4/QMwefiGEzEEfL u5Rlz/lzV7JM4P6G6SgNYhKndDO4PsUXSnMUbMm8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730387AbgIAPbn (ORCPT ); Tue, 1 Sep 2020 11:31:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:35000 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730728AbgIAPbm (ORCPT ); Tue, 1 Sep 2020 11:31:42 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 A632E21582; Tue, 1 Sep 2020 15:31:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974302; bh=XLPcl2FH3swdl5UwvcCQtT2pdcZTolwEr4lc6czp6xU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Yyyn9j8rA+kcU+rNFqULO0W+ijb8Nttf6E1jeRt4eBzPMgOYwwiq7AFrQajq/QkSl 1AvzuR5EZkwpcazfexnej5Q7yMlUuLarsGWR+JDRYhfdq4CiF3gv2gxxLBu2ktzN5F ZChcLt6qKhPl+wBIXX61d3Ya6Vq94r8bgUkBgGCk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Antonio Borneo , Alain Volmat , Mark Brown , Sasha Levin Subject: [PATCH 5.4 122/214] spi: stm32h7: fix race condition at end of transfer Date: Tue, 1 Sep 2020 17:10:02 +0200 Message-Id: <20200901150958.829122069@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901150952.963606936@linuxfoundation.org> References: <20200901150952.963606936@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Antonio Borneo [ Upstream commit 135dd873d3c76d812ae64c668adef3f2c59ed27f ] The caller of stm32_spi_transfer_one(), spi_transfer_one_message(), is waiting for us to call spi_finalize_current_transfer() and will eventually schedule a new transfer, if available. We should guarantee that the spi controller is really available before calling spi_finalize_current_transfer(). Move the call to spi_finalize_current_transfer() _after_ the call to stm32_spi_disable(). Signed-off-by: Antonio Borneo Signed-off-by: Alain Volmat Link: https://lore.kernel.org/r/1597043558-29668-2-git-send-email-alain.volmat@st.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-stm32.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index dc6334f67e6ae..25b1348aaa549 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -967,8 +967,8 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id) spin_unlock_irqrestore(&spi->lock, flags); if (end) { - spi_finalize_current_transfer(master); stm32h7_spi_disable(spi); + spi_finalize_current_transfer(master); } return IRQ_HANDLED;