From patchwork Thu Jan 20 11:21:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12718527 X-Patchwork-Delegate: kuba@kernel.org 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 5F564C433FE for ; Thu, 20 Jan 2022 11:21:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230522AbiATLVZ (ORCPT ); Thu, 20 Jan 2022 06:21:25 -0500 Received: from relay6-d.mail.gandi.net ([217.70.183.198]:50601 "EHLO relay6-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229696AbiATLVV (ORCPT ); Thu, 20 Jan 2022 06:21:21 -0500 Received: (Authenticated sender: miquel.raynal@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id EA2F7C0008; Thu, 20 Jan 2022 11:21:18 +0000 (UTC) From: Miquel Raynal To: Alexander Aring , Stefan Schmidt , linux-wpan@vger.kernel.org Cc: "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, Xue Liu , Marcel Holtmann , Harry Morris , David Girault , Romuald Despres , Frederic Blain , Nicolas Schodet , Thomas Petazzoni , Miquel Raynal Subject: [wpan-next v2 1/9] net: ieee802154: hwsim: Ensure proper channel selection at probe time Date: Thu, 20 Jan 2022 12:21:07 +0100 Message-Id: <20220120112115.448077-2-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220120112115.448077-1-miquel.raynal@bootlin.com> References: <20220120112115.448077-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Drivers are expected to set the PHY current_channel and current_page according to their default state. The hwsim driver is advertising being configured on channel 13 by default but that is not reflected in its own internal pib structure. In order to ensure that this driver consider the current channel as being 13 internally, we can call hwsim_hw_channel() instead of creating an empty pib structure. We assume here that kvfree_rcu(NULL) is a valid call. Fixes: f25da51fdc38 ("ieee802154: hwsim: add replacement for fakelb") Signed-off-by: Miquel Raynal Reported-by: kernel test robot --- drivers/net/ieee802154/mac802154_hwsim.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c index 8caa61ec718f..795f8eb5387b 100644 --- a/drivers/net/ieee802154/mac802154_hwsim.c +++ b/drivers/net/ieee802154/mac802154_hwsim.c @@ -732,7 +732,6 @@ static int hwsim_add_one(struct genl_info *info, struct device *dev, { struct ieee802154_hw *hw; struct hwsim_phy *phy; - struct hwsim_pib *pib; int idx; int err; @@ -780,13 +779,8 @@ static int hwsim_add_one(struct genl_info *info, struct device *dev, /* hwsim phy channel 13 as default */ hw->phy->current_channel = 13; - pib = kzalloc(sizeof(*pib), GFP_KERNEL); - if (!pib) { - err = -ENOMEM; - goto err_pib; - } + hwsim_hw_channel(hw, hw->phy->current_page, hw->phy->current_channel); - rcu_assign_pointer(phy->pib, pib); phy->idx = idx; INIT_LIST_HEAD(&phy->edges); @@ -815,8 +809,6 @@ static int hwsim_add_one(struct genl_info *info, struct device *dev, err_subscribe: ieee802154_unregister_hw(phy->hw); err_reg: - kfree(pib); -err_pib: ieee802154_free_hw(phy->hw); return err; }