From patchwork Fri Jul 16 11:44:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adrian Hunter X-Patchwork-Id: 478672 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 CAEAFC636CA for ; Fri, 16 Jul 2021 11:44:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D67C613FA for ; Fri, 16 Jul 2021 11:44:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232262AbhGPLrB (ORCPT ); Fri, 16 Jul 2021 07:47:01 -0400 Received: from mga04.intel.com ([192.55.52.120]:40164 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232106AbhGPLrB (ORCPT ); Fri, 16 Jul 2021 07:47:01 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10046"; a="208902309" X-IronPort-AV: E=Sophos;i="5.84,244,1620716400"; d="scan'208";a="208902309" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Jul 2021 04:44:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,244,1620716400"; d="scan'208";a="467107146" Received: from ahunter-desktop.fi.intel.com ([10.237.72.79]) by fmsmga008.fm.intel.com with ESMTP; 16 Jul 2021 04:44:03 -0700 From: Adrian Hunter To: "Rafael J . Wysocki" Cc: Greg Kroah-Hartman , Saravana Kannan , "Martin K . Petersen" , "James E . J . Bottomley" , linux-scsi@vger.kernel.org, Avri Altman , Bean Huo , Can Guo , Asutosh Das , Bart Van Assche , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH V4 1/2] driver core: Prevent warning when removing a device link from unregistered consumer Date: Fri, 16 Jul 2021 14:44:07 +0300 Message-Id: <20210716114408.17320-2-adrian.hunter@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210716114408.17320-1-adrian.hunter@intel.com> References: <20210716114408.17320-1-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org sysfs_remove_link() causes a warning if the parent directory does not exist. That can happen if the device link consumer has not been registered. So do not attempt sysfs_remove_link() in that case. Fixes: 287905e68dd29 ("driver core: Expose device link details in sysfs") Signed-off-by: Adrian Hunter Cc: stable@vger.kernel.org # 5.9+ Reviewed-by: Rafael J. Wysocki --- drivers/base/core.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index ea5b85354526..2de8f7d8cf54 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -575,8 +575,10 @@ static void devlink_remove_symlinks(struct device *dev, return; } - snprintf(buf, len, "supplier:%s:%s", dev_bus_name(sup), dev_name(sup)); - sysfs_remove_link(&con->kobj, buf); + if (device_is_registered(con)) { + snprintf(buf, len, "supplier:%s:%s", dev_bus_name(sup), dev_name(sup)); + sysfs_remove_link(&con->kobj, buf); + } snprintf(buf, len, "consumer:%s:%s", dev_bus_name(con), dev_name(con)); sysfs_remove_link(&sup->kobj, buf); kfree(buf);