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,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 41260C43603 for ; Tue, 10 Dec 2019 22:39:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0BCC42053B for ; Tue, 10 Dec 2019 22:39:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576017572; bh=wLl7Ehs+bVTJdIG5mZkS94SOeaPFy8FIKq6DuJkj17I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=g6CpozwdLSsWSkNWmhTgabzY+kNkmibQQuAIVxAySYeuerW+ic/QxB+D9S4BC/vWn A2B44kHoRQO9sLefnt8xZ6U0nN35B5t1eEhO3VKgpbF7TVK6lhfTuJemM+ke3lKZo2 +kXIhg1lIRR7df8twFxenBSv5hH6ZAyjqkcYckJ0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730480AbfLJWjZ (ORCPT ); Tue, 10 Dec 2019 17:39:25 -0500 Received: from mail.kernel.org ([198.145.29.99]:54086 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728334AbfLJWdW (ORCPT ); Tue, 10 Dec 2019 17:33:22 -0500 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 48C1320836; Tue, 10 Dec 2019 22:33:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576017202; bh=wLl7Ehs+bVTJdIG5mZkS94SOeaPFy8FIKq6DuJkj17I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FG2QzvghzWC9vGThOTjdAerWMmDWP85KVJ7e3ymXLAtXRKwfd+dICeuNLGa3XQ2wl iv2sLnqmOBiZLMT9Mqztl6rlkfSV2D0OGv7bL46a9bhX4y44xw34KSgX9xJ/xtO0qp BKi33K+yo9ikLJ6xxljIir5yXCRHCdGT6hvLsyAo= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Lukasz Majewski , Mark Brown , kbuild test robot , Sasha Levin , linux-spi@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 04/71] spi: Add call to spi_slave_abort() function when spidev driver is released Date: Tue, 10 Dec 2019 17:32:09 -0500 Message-Id: <20191210223316.14988-4-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191210223316.14988-1-sashal@kernel.org> References: <20191210223316.14988-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lukasz Majewski [ Upstream commit 9f918a728cf86b2757b6a7025e1f46824bfe3155 ] This change is necessary for spidev devices (e.g. /dev/spidev3.0) working in the slave mode (like NXP's dspi driver for Vybrid SoC). When SPI HW works in this mode - the master is responsible for providing CS and CLK signals. However, when some fault happens - like for example distortion on SPI lines - the SPI Linux driver needs a chance to recover from this abnormal situation and prepare itself for next (correct) transmission. This change doesn't pose any threat on drivers working in master mode as spi_slave_abort() function checks if SPI slave mode is supported. Signed-off-by: Lukasz Majewski Link: https://lore.kernel.org/r/20190924110547.14770-2-lukma@denx.de Signed-off-by: Mark Brown Reported-by: kbuild test robot Link: https://lore.kernel.org/r/20190925091143.15468-2-lukma@denx.de Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spidev.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index c5f1045561acc..3709088d4d244 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -662,6 +662,9 @@ static int spidev_release(struct inode *inode, struct file *filp) if (dofree) kfree(spidev); } +#ifdef CONFIG_SPI_SLAVE + spi_slave_abort(spidev->spi); +#endif mutex_unlock(&device_list_lock); return 0; -- 2.20.1