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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AE1DC4332F for ; Mon, 14 Nov 2022 12:54:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237488AbiKNMyZ (ORCPT ); Mon, 14 Nov 2022 07:54:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237306AbiKNMyW (ORCPT ); Mon, 14 Nov 2022 07:54:22 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 980CD26563 for ; Mon, 14 Nov 2022 04:54:21 -0800 (PST) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 3519E61154 for ; Mon, 14 Nov 2022 12:54:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 283DAC433D7; Mon, 14 Nov 2022 12:54:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1668430460; bh=fKYdRVNOkDX0R9N0+Z+Vaqr6lZPJUnZqlLQ2rZ6yabw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uXKHmFVh0+ZrAdbZlD4YSOUH22/bB9kCa5UGi3iRG5lv/H4KBL6Ml3gbQPDd9+IGI 3wo0dDwKIqxFymkUwRV737cubGj4w0OArNnlGs+cc3kkAveUNjixjB/0Zon59d6b41 j/rUNO/Umwd/ym2dyjeRlawfbOg1P/6YP/bwBMSo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johannes Berg , Sasha Levin Subject: [PATCH 5.15 009/131] wifi: cfg80211: silence a sparse RCU warning Date: Mon, 14 Nov 2022 13:44:38 +0100 Message-Id: <20221114124449.139956384@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221114124448.729235104@linuxfoundation.org> References: <20221114124448.729235104@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Johannes Berg [ Upstream commit 03c0ad4b06c3566de624b4f4b78ac1a5d1e4c8e7 ] All we're going to do with this pointer is assign it to another __rcu pointer, but sparse can't see that, so use rcu_access_pointer() to silence the warning here. Fixes: c90b93b5b782 ("wifi: cfg80211: update hidden BSSes to avoid WARN_ON") Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/wireless/scan.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/wireless/scan.c b/net/wireless/scan.c index f0de22a6caf7..2477d28c2dab 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -1676,7 +1676,9 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev, if (old == rcu_access_pointer(known->pub.ies)) rcu_assign_pointer(known->pub.ies, new->pub.beacon_ies); - cfg80211_update_hidden_bsses(known, new->pub.beacon_ies, old); + cfg80211_update_hidden_bsses(known, + rcu_access_pointer(new->pub.beacon_ies), + old); if (old) kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head); -- 2.35.1