From patchwork Mon Mar 13 18:28:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 664041 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 18B99C74A4B for ; Mon, 13 Mar 2023 18:30:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230195AbjCMSaL (ORCPT ); Mon, 13 Mar 2023 14:30:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230224AbjCMSaI (ORCPT ); Mon, 13 Mar 2023 14:30:08 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45F60746FF; Mon, 13 Mar 2023 11:29:32 -0700 (PDT) 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 1C2FCB811D8; Mon, 13 Mar 2023 18:29:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8DC4FC433D2; Mon, 13 Mar 2023 18:29:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678732161; bh=F5jf/JTxW3R0JUCStVxeFrVkNOg4tNx9+6PiesOi5Z8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=p5+h/FwcgMxm2RjkgHinbqRrDA77EWxq/o7knveMcMtDIzlPCfFnTqw5V/1PxJiQg zFsA9bxqVx2KJSICOO2UileuoWlC6nJjRl7M3ZHuoH5/BI38+/RPxNaEro7zbdT4GU NNLFzrMNVoMeJiMIdLUZzbNmaQUnf6uG1gPE5FIs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: rafael@kernel.org, Greg Kroah-Hartman , Len Brown , linux-acpi@vger.kernel.org Subject: [PATCH 02/36] ACPI: LPIT: move to use bus_get_dev_root() Date: Mon, 13 Mar 2023 19:28:44 +0100 Message-Id: <20230313182918.1312597-2-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230313182918.1312597-1-gregkh@linuxfoundation.org> References: <20230313182918.1312597-1-gregkh@linuxfoundation.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2324; i=gregkh@linuxfoundation.org; h=from:subject; bh=F5jf/JTxW3R0JUCStVxeFrVkNOg4tNx9+6PiesOi5Z8=; b=owGbwMvMwCRo6H6F97bub03G02pJDCn82aXsiSHvwmLzbOPu+O+yzVkcvPHv/zdVcpOtbZKie +cfXxvdEcvCIMjEICumyPJlG8/R/RWHFL0MbU/DzGFlAhnCwMUpABOZt51hnt6lmX6hmkefHOS9 pevItv7wV6dKc4YF+37K+2lxMZxkfX1Ae5mG0QWp0OqtAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Direct access to the struct bus_type dev_root pointer is going away soon so replace that with a call to bus_get_dev_root() instead, which is what it is there for. Cc: "Rafael J. Wysocki" Cc: Len Brown Cc: linux-acpi@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- Note, this is a patch that is a prepatory cleanup as part of a larger series of patches that is working on resolving some old driver core design mistakes. It will build and apply cleanly on top of 6.3-rc2 on its own, but I'd prefer if I could take it through my driver-core tree so that the driver core changes can be taken through there for 6.4-rc1. drivers/acpi/acpi_lpit.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/acpi/acpi_lpit.c b/drivers/acpi/acpi_lpit.c index 3843d2576d3f..73b5c4800150 100644 --- a/drivers/acpi/acpi_lpit.c +++ b/drivers/acpi/acpi_lpit.c @@ -98,6 +98,8 @@ EXPORT_SYMBOL_GPL(lpit_read_residency_count_address); static void lpit_update_residency(struct lpit_residency_info *info, struct acpi_lpit_native *lpit_native) { + struct device *dev_root = bus_get_dev_root(&cpu_subsys); + info->frequency = lpit_native->counter_frequency ? lpit_native->counter_frequency : tsc_khz * 1000; if (!info->frequency) @@ -111,15 +113,18 @@ static void lpit_update_residency(struct lpit_residency_info *info, return; /* Silently fail, if cpuidle attribute group is not present */ - sysfs_add_file_to_group(&cpu_subsys.dev_root->kobj, - &dev_attr_low_power_idle_system_residency_us.attr, - "cpuidle"); + if (dev_root) + sysfs_add_file_to_group(&dev_root->kobj, + &dev_attr_low_power_idle_system_residency_us.attr, + "cpuidle"); } else if (info->gaddr.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) { /* Silently fail, if cpuidle attribute group is not present */ - sysfs_add_file_to_group(&cpu_subsys.dev_root->kobj, - &dev_attr_low_power_idle_cpu_residency_us.attr, - "cpuidle"); + if (dev_root) + sysfs_add_file_to_group(&dev_root->kobj, + &dev_attr_low_power_idle_cpu_residency_us.attr, + "cpuidle"); } + put_device(dev_root); } static void lpit_process(u64 begin, u64 end)