From patchwork Mon Jan 16 15:51:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 643352 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 9E884C54EBE for ; Mon, 16 Jan 2023 17:18:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234394AbjAPRSN (ORCPT ); Mon, 16 Jan 2023 12:18:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234515AbjAPRRk (ORCPT ); Mon, 16 Jan 2023 12:17:40 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B964F530ED; Mon, 16 Jan 2023 08:57:41 -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 ams.source.kernel.org (Postfix) with ESMTPS id ECBF7B8105D; Mon, 16 Jan 2023 16:57:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2B28CC433D2; Mon, 16 Jan 2023 16:57:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673888258; bh=JXHgnEsoWZeWPLb0O7tMwk9WlvFs6jzSGMct0JgbqeA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GLjZgojLbwgFak3UbR92tKCxj+l0SfvDflsHuB7pe/f4HdHVj/vz796RwT36imxSr HYUl0ZbKD2/qMBABRtU99vQnOUCuPAt5Af0QPB3UWlCRlp0y7I8gYVJbwayIIKxb2z VIOHJcpMncXtf4ies++1dYOP1nZNQ47DKSN1wQyA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, linux-pm@vger.kernel.org, Linus Walleij , Thierry Reding , Mark Brown , Liam Girdwood , Bjorn Andersson , Saravana Kannan , Todd Kjos , Len Brown , Pavel Machek , Ulf Hansson , Kevin Hilman , "Rafael J. Wysocki" , Rob Herring , "Rafael J. Wysocki" , John Stultz , Sasha Levin Subject: [PATCH 4.19 431/521] driver core: Set deferred_probe_timeout to a longer default if CONFIG_MODULES is set Date: Mon, 16 Jan 2023 16:51:33 +0100 Message-Id: <20230116154906.411052637@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154847.246743274@linuxfoundation.org> References: <20230116154847.246743274@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: John Stultz [ Upstream commit e2cec7d6853712295cef5377762165a489b2957f ] When using modules, its common for the modules not to be loaded until quite late by userland. With the current code, driver_deferred_probe_check_state() will stop returning EPROBE_DEFER after late_initcall, which can cause module dependency resolution to fail after that. So allow a longer window of 30 seconds (picked somewhat arbitrarily, but influenced by the similar regulator core timeout value) in the case where modules are enabled. Cc: linux-pm@vger.kernel.org Cc: Greg Kroah-Hartman Cc: Linus Walleij Cc: Thierry Reding Cc: Mark Brown Cc: Liam Girdwood Cc: Bjorn Andersson Cc: Saravana Kannan Cc: Todd Kjos Cc: Len Brown Cc: Pavel Machek Cc: Ulf Hansson Cc: Kevin Hilman Cc: "Rafael J. Wysocki" Cc: Rob Herring Reviewed-by: Bjorn Andersson Reviewed-by: Rafael J. Wysocki Signed-off-by: John Stultz Link: https://lore.kernel.org/r/20200225050828.56458-3-john.stultz@linaro.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/base/dd.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 63390a416b44..529d324a0f20 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -220,7 +220,16 @@ static int deferred_devs_show(struct seq_file *s, void *data) } DEFINE_SHOW_ATTRIBUTE(deferred_devs); +#ifdef CONFIG_MODULES +/* + * In the case of modules, set the default probe timeout to + * 30 seconds to give userland some time to load needed modules + */ +static int deferred_probe_timeout = 30; +#else +/* In the case of !modules, no probe timeout needed */ static int deferred_probe_timeout = -1; +#endif static int __init deferred_probe_timeout_setup(char *str) { deferred_probe_timeout = simple_strtol(str, NULL, 10);