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=-12.8 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,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 D17A3C433E1 for ; Mon, 17 Aug 2020 19:32:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A156F2065D for ; Mon, 17 Aug 2020 19:32:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597692725; bh=OICnLkXlVe5P+5n/vyf978ebwQib89u725aBI8qOb9s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xoAU2GvVF/kPFVtE6zx8F5FUfC+L5FcicdZnLdZB+PnesRCrr1ysL7WUWcz3Pp9HH lrqrSWaVb2NjLkKWvPcrsE4d1k7h0oh0TQB2DU9a5YAm2Y3X6uPqOeZtMIA/IEmpNX kw0pvQrotDqLQhoghfr1hLndwr1Mf2ie60pBwNL8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404174AbgHQTcC (ORCPT ); Mon, 17 Aug 2020 15:32:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:56816 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729351AbgHQPbl (ORCPT ); Mon, 17 Aug 2020 11:31:41 -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 623FC20B1F; Mon, 17 Aug 2020 15:31:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597678301; bh=OICnLkXlVe5P+5n/vyf978ebwQib89u725aBI8qOb9s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VwI0nMiWs8Xu5GgNHllY0l4uxMzYgRg4RfwoVbNuAhKMsSvNMNnKct1SJYZ1WI7H4 YZKdGwfyr5pDYAEsmFR11ja9dbe7O6P102F0stsuIJjc9vrbDpZOHx1JLvba4lJGzF 92MOmWeC/Umha5tNIxbn46KqCFpXv6PEbKUq15AA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hauke Mehrtens , Mark Brown , Sasha Levin Subject: [PATCH 5.8 256/464] spi: lantiq-ssc: Fix warning by using WQ_MEM_RECLAIM Date: Mon, 17 Aug 2020 17:13:29 +0200 Message-Id: <20200817143846.056139584@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: Hauke Mehrtens [ Upstream commit ba3548cf29616b58c93bbaffc3d636898d009858 ] The lantiq-ssc driver uses internally an own workqueue to wait till the data is not only written out of the FIFO but really written to the wire. This workqueue is flushed while the SPI subsystem is working in some other system workqueue. The system workqueue is marked as WQ_MEM_RECLAIM, but the workqueue in the lantiq-ssc driver does not use WQ_MEM_RECLAIM for now. Add this flag too to prevent this warning. This fixes the following warning: [ 2.975956] WARNING: CPU: 1 PID: 17 at kernel/workqueue.c:2614 check_flush_dependency+0x168/0x184 [ 2.984752] workqueue: WQ_MEM_RECLAIM kblockd:blk_mq_run_work_fn is flushing !WQ_MEM_RECLAIM 1e100800.spi:0x0 Fixes: 891b7c5fbf61 ("mtd_blkdevs: convert to blk-mq") Signed-off-by: Hauke Mehrtens Link: https://lore.kernel.org/r/20200717215648.20522-1-hauke@hauke-m.de Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-lantiq-ssc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-lantiq-ssc.c b/drivers/spi/spi-lantiq-ssc.c index 44600fb71c484..049a64451c750 100644 --- a/drivers/spi/spi-lantiq-ssc.c +++ b/drivers/spi/spi-lantiq-ssc.c @@ -909,7 +909,7 @@ static int lantiq_ssc_probe(struct platform_device *pdev) master->bits_per_word_mask = SPI_BPW_RANGE_MASK(2, 8) | SPI_BPW_MASK(16) | SPI_BPW_MASK(32); - spi->wq = alloc_ordered_workqueue(dev_name(dev), 0); + spi->wq = alloc_ordered_workqueue(dev_name(dev), WQ_MEM_RECLAIM); if (!spi->wq) { err = -ENOMEM; goto err_clk_put; -- 2.25.1