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 B1849C4332F for ; Mon, 14 Nov 2022 13:01:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237688AbiKNNBO (ORCPT ); Mon, 14 Nov 2022 08:01:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54160 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237668AbiKNNBA (ORCPT ); Mon, 14 Nov 2022 08:01:00 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C82F2873F for ; Mon, 14 Nov 2022 05:01:00 -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 BE05461154 for ; Mon, 14 Nov 2022 13:00:59 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id ACCB5C43145; Mon, 14 Nov 2022 13:00:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1668430859; bh=XAPT9Z94lwChKJMYKAGPmbt0gRT8PyjJ0IpNJkNJdjk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z93TOXf1kVn8AvHHhMkmbwJhe+aUP4E5znVwzp2LjkjXXHqro3gOsOpx6uaMT+oEg qgYWDa+YVK9wdpWwtwuIjZr4LHfhCgKbgDx9faJXd1+kdB5MDlZGDlEJNSzXpRpAL0 zMdb2/2a/HSvEZNLiCIHEaiCVy1JNaI8kjvLGl4o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johannes Berg , Sasha Levin Subject: [PATCH 6.0 017/190] wifi: cfg80211: silence a sparse RCU warning Date: Mon, 14 Nov 2022 13:44:01 +0100 Message-Id: <20221114124459.531704098@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221114124458.806324402@linuxfoundation.org> References: <20221114124458.806324402@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 39fb9cc25cdc..9067e4b70855 100644 --- a/net/wireless/scan.c +++ b/net/wireless/scan.c @@ -1674,7 +1674,9 @@ 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