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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 8028BC00454 for ; Wed, 11 Dec 2019 15:45:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 54A662073D for ; Wed, 11 Dec 2019 15:45:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576079140; bh=z63DRufKh+HaVrDTfZRb6x5UHAIAw5yQ6olP9JxInJw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=k76xfdnJl2CYF4l+pBvUYR47LVBUIcpMXqglJW3f4wd7yEN72VgpcahtKwflCCbl4 w+Z0LPQQE8suTRndJXmRYC5WMExJpbUaxXIPMGQVrscV8o50Ua0S+a+Ruc7TNOFGYh 5dZmFGyAuWP4XNIfEt94OpFk1tzDdAAh2VdwE3FA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732761AbfLKP1E (ORCPT ); Wed, 11 Dec 2019 10:27:04 -0500 Received: from mail.kernel.org ([198.145.29.99]:60698 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733230AbfLKP1E (ORCPT ); Wed, 11 Dec 2019 10:27:04 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0C7242467D; Wed, 11 Dec 2019 15:27:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576078023; bh=z63DRufKh+HaVrDTfZRb6x5UHAIAw5yQ6olP9JxInJw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EkK3vQ5bUnCxGjljoJ5Th9vOM8DELEAsWK5gWI/Ufj7PqZQvK6b8CD5Vmz6SNLinw /5016riBYGFZw57493eq0Vqyy+9rNXVw7bzZoXj/gWMet520Zk08oaxiKpszIrcTQU 7v7aJLMQ8OqBYjon/xEv73/cLMwmsNxFcF1M7wAc= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Martin Schiller , Pavel Machek , Sasha Levin , linux-leds@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 18/79] leds: trigger: netdev: fix handling on interface rename Date: Wed, 11 Dec 2019 10:25:42 -0500 Message-Id: <20191211152643.23056-18-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191211152643.23056-1-sashal@kernel.org> References: <20191211152643.23056-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-leds-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org From: Martin Schiller [ Upstream commit 5f820ed52371b4f5d8c43c93f03408d0dbc01e5b ] The NETDEV_CHANGENAME code is not "unneeded" like it is stated in commit 4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface rename"). The event was accidentally misinterpreted equivalent to NETDEV_UNREGISTER, but should be equivalent to NETDEV_REGISTER. This was the case in the original code from the openwrt project. Otherwise, you are unable to set netdev led triggers for (non-existent) netdevices, which has to be renamed. This is the case, for example, for ppp interfaces in openwrt. Fixes: 06f502f57d0d ("leds: trigger: Introduce a NETDEV trigger") Fixes: 4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface rename") Signed-off-by: Martin Schiller Signed-off-by: Pavel Machek Signed-off-by: Sasha Levin --- drivers/leds/trigger/ledtrig-netdev.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c index 136f86a1627d1..d5e774d830215 100644 --- a/drivers/leds/trigger/ledtrig-netdev.c +++ b/drivers/leds/trigger/ledtrig-netdev.c @@ -302,10 +302,12 @@ static int netdev_trig_notify(struct notifier_block *nb, container_of(nb, struct led_netdev_data, notifier); if (evt != NETDEV_UP && evt != NETDEV_DOWN && evt != NETDEV_CHANGE - && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER) + && evt != NETDEV_REGISTER && evt != NETDEV_UNREGISTER + && evt != NETDEV_CHANGENAME) return NOTIFY_DONE; if (!(dev == trigger_data->net_dev || + (evt == NETDEV_CHANGENAME && !strcmp(dev->name, trigger_data->device_name)) || (evt == NETDEV_REGISTER && !strcmp(dev->name, trigger_data->device_name)))) return NOTIFY_DONE; @@ -315,6 +317,7 @@ static int netdev_trig_notify(struct notifier_block *nb, clear_bit(NETDEV_LED_MODE_LINKUP, &trigger_data->mode); switch (evt) { + case NETDEV_CHANGENAME: case NETDEV_REGISTER: if (trigger_data->net_dev) dev_put(trigger_data->net_dev); -- 2.20.1