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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E087C54EAA for ; Mon, 30 Jan 2023 14:13:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237325AbjA3ONo (ORCPT ); Mon, 30 Jan 2023 09:13:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237291AbjA3ONd (ORCPT ); Mon, 30 Jan 2023 09:13:33 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 36997233E6 for ; Mon, 30 Jan 2023 06:13:31 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id BFA136102E for ; Mon, 30 Jan 2023 14:13:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B9973C433D2; Mon, 30 Jan 2023 14:13:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1675088010; bh=pQA/HbSrQYi/SLs7Wq695giNStFCaHnSeweNSMloVX4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aFcptdhPWzUX3phbebiudFdnLvGSI5BNLcRupqzBwU1HBBR+V06toDCycZ8Z6jD2m zNDzyMhvpklms2bbHPcntP8hB8XBOG5fN14+hC0/0/+bbP5zlidOgAJMt6XDkegXcz ff21ewfcrHypM08LtNQGPPX0i9oDuKCsg/mWLpqw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yang Yingliang , Sasha Levin Subject: [PATCH 5.15 085/204] w1: fix WARNING after calling w1_process() Date: Mon, 30 Jan 2023 14:50:50 +0100 Message-Id: <20230130134320.069574202@linuxfoundation.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230130134316.327556078@linuxfoundation.org> References: <20230130134316.327556078@linuxfoundation.org> User-Agent: quilt/0.67 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: Yang Yingliang [ Upstream commit 36225a7c72e9e3e1ce4001b6ce72849f5c9a2d3b ] I got the following WARNING message while removing driver(ds2482): ------------[ cut here ]------------ do not call blocking ops when !TASK_RUNNING; state=1 set at [<000000002d50bfb6>] w1_process+0x9e/0x1d0 [wire] WARNING: CPU: 0 PID: 262 at kernel/sched/core.c:9817 __might_sleep+0x98/0xa0 CPU: 0 PID: 262 Comm: w1_bus_master1 Tainted: G N 6.1.0-rc3+ #307 RIP: 0010:__might_sleep+0x98/0xa0 Call Trace: exit_signals+0x6c/0x550 do_exit+0x2b4/0x17e0 kthread_exit+0x52/0x60 kthread+0x16d/0x1e0 ret_from_fork+0x1f/0x30 The state of task is set to TASK_INTERRUPTIBLE in loop in w1_process(), set it to TASK_RUNNING when it breaks out of the loop to avoid the warning. Fixes: 3c52e4e62789 ("W1: w1_process, block or sleep") Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20221205101558.3599162-1-yangyingliang@huawei.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/w1/w1.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 8b35fae4cd61..4a2ddf730a3a 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -1195,8 +1195,10 @@ int w1_process(void *data) */ mutex_unlock(&dev->list_mutex); - if (kthread_should_stop()) + if (kthread_should_stop()) { + __set_current_state(TASK_RUNNING); break; + } /* Only sleep when the search is active. */ if (dev->search_count) { -- 2.39.0