From patchwork Fri Jul 1 14:30:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12903456 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 29180C433EF for ; Fri, 1 Jul 2022 14:37:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233340AbiGAOg6 (ORCPT ); Fri, 1 Jul 2022 10:36:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56968 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231879AbiGAOgI (ORCPT ); Fri, 1 Jul 2022 10:36:08 -0400 Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::229]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5208470E41; Fri, 1 Jul 2022 07:31:34 -0700 (PDT) Received: (Authenticated sender: miquel.raynal@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 8A7BAFF805; Fri, 1 Jul 2022 14:31:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1656685892; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1LSAcTXR6qicmezvRhlLgmcrUrtDDK9geZUwOZJlwAk=; b=PeqKqg6LU1afhIBtFeBEK2gfuSydBsWEau2zrssFjDPO0ja4xUfWRZpZwdN7sDADsNyMxt XapjTXFMhdlqNZSzhZl/Ro5TvUqgQNgsOeJW7PCxNmUnDzlJrFjB16xx/9kbF6i+NL33v1 9ML97MhOiRUR7Op9CFG/+DPpE4WKUJhisVbKncsgcqPxgiB0uklO0zZQO8VeE8jOGWqn+G kWvCSyrO++xVQDutKpWZCZn9rmLM2A0mIRMBAqZcsLptmBATu6x8A65NakWlB9WeJbaNYR 4yeg+cgbEqHxvtGUzQKvnEZ4QFrbP0BqBbc/6/Y8zxqD3vVlULHvG9E+6NInkw== From: Miquel Raynal To: Alexander Aring , Stefan Schmidt , linux-wpan@vger.kernel.org Cc: "David S. Miller" , Jakub Kicinski , Paolo Abeni , Eric Dumazet , netdev@vger.kernel.org, David Girault , Romuald Despres , Frederic Blain , Nicolas Schodet , Thomas Petazzoni , Miquel Raynal Subject: [PATCH wpan-next 19/20] ieee802154: hwsim: Do not check the rtnl Date: Fri, 1 Jul 2022 16:30:51 +0200 Message-Id: <20220701143052.1267509-20-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220701143052.1267509-1-miquel.raynal@bootlin.com> References: <20220701143052.1267509-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org There is no need to ensure the rtnl is locked when changing a driver's channel. This cause issues when scanning and this is the only driver relying on it. Just drop this dependency because it does not seem legitimate. Signed-off-by: Miquel Raynal --- drivers/net/ieee802154/mac802154_hwsim.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c index 38c217bd7c82..a5b9fc2fb64c 100644 --- a/drivers/net/ieee802154/mac802154_hwsim.c +++ b/drivers/net/ieee802154/mac802154_hwsim.c @@ -100,7 +100,7 @@ static int hwsim_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel) pib->page = page; pib->channel = channel; - pib_old = rtnl_dereference(phy->pib); + rcu_assign_pointer(pib_old, phy->pib); rcu_assign_pointer(phy->pib, pib); kfree_rcu(pib_old, rcu); return 0;