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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 7C5F5C433ED for ; Fri, 9 Apr 2021 10:10:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 56C8961185 for ; Fri, 9 Apr 2021 10:10:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234007AbhDIKKs (ORCPT ); Fri, 9 Apr 2021 06:10:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:51394 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233795AbhDIKDK (ORCPT ); Fri, 9 Apr 2021 06:03:10 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EF2E861279; Fri, 9 Apr 2021 10:00:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617962430; bh=LIe91PbXxmYaa+uJZH40oawnusFW6+Dym81ZSP6p2YY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dqylAxcDO3cV2EcceyiVaw/vcMex7bDrL0zauRCjkVHpOzhR0loArdnkf0Xtch0p3 CAhR5r/HkNWUmtpUJmOS91iFMHDnpfNghV0Ap//X7r3W1h16vcwmFICqLmh05/t35u qaK5IOfZHd/PeeJT/7VLg8ebhUoWW3JMlQy3sdvU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Karthikeyan Kathirvel , Johannes Berg , Sasha Levin Subject: [PATCH 5.11 13/45] mac80211: choose first enabled channel for monitor Date: Fri, 9 Apr 2021 11:53:39 +0200 Message-Id: <20210409095305.825871023@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210409095305.397149021@linuxfoundation.org> References: <20210409095305.397149021@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Karthikeyan Kathirvel [ Upstream commit 041c881a0ba8a75f71118bd9766b78f04beed469 ] Even if the first channel from sband channel list is invalid or disabled mac80211 ends up choosing it as the default channel for monitor interfaces, making them not usable. Fix this by assigning the first available valid or enabled channel instead. Signed-off-by: Karthikeyan Kathirvel Link: https://lore.kernel.org/r/1615440547-7661-1-git-send-email-kathirve@codeaurora.org [reword commit message, comment, code cleanups] Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/main.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/net/mac80211/main.c b/net/mac80211/main.c index dee88ec566ad..d1023188ef37 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -970,8 +970,19 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) continue; if (!dflt_chandef.chan) { + /* + * Assign the first enabled channel to dflt_chandef + * from the list of channels + */ + for (i = 0; i < sband->n_channels; i++) + if (!(sband->channels[i].flags & + IEEE80211_CHAN_DISABLED)) + break; + /* if none found then use the first anyway */ + if (i == sband->n_channels) + i = 0; cfg80211_chandef_create(&dflt_chandef, - &sband->channels[0], + &sband->channels[i], NL80211_CHAN_NO_HT); /* init channel we're on */ if (!local->use_chanctx && !local->_oper_chandef.chan) { -- 2.30.2