From patchwork Fri Feb 24 12:59:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Berg X-Patchwork-Id: 656416 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 0E63BC61DA3 for ; Fri, 24 Feb 2023 12:59:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230126AbjBXM7x (ORCPT ); Fri, 24 Feb 2023 07:59:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229706AbjBXM7w (ORCPT ); Fri, 24 Feb 2023 07:59:52 -0500 Received: from sipsolutions.net (s3.sipsolutions.net [IPv6:2a01:4f8:191:4433::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 800FE16AE6; Fri, 24 Feb 2023 04:59:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sipsolutions.net; s=mail; h=Content-Transfer-Encoding:MIME-Version: Message-Id:Date:Subject:Cc:To:From:Content-Type:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-To:Resent-Cc: Resent-Message-ID:In-Reply-To:References; bh=Jlgy46vRWm38XE44THWJNwk9UlLs82ccZrXvZt59/ZY=; t=1677243580; x=1678453180; b=pd8tOzEa68iDArorQNvjGeWQUMiqha2b9SsDWBPjUBD+sD3j4BFHkhL2aSwDS9lHwog2cLlKjrN ekrM+eqgue8aay0ux6Wg6UjGY7Nh5tw27ENsehxHkytnGpJ7IxDtZP6Hd7MhnH7JKJfsKpbnZvwwC YML7egFD0edmTY6QK0dsN/2zd/gJDeWheIeWP49Oz2soA5zG4bSiOxLGVoqWHbLZtPdZTrQfSYtDc 8LtAqZ+mbBEsKMpZ3r66vr29O7Acs7v/9XXYjduDVTHOWOciuJC+Mt/xebFcp473obHsYd6jkix7U OqBohAKVjBROyCChhWd7UKeOGWjHG12+k9Gg==; Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1pVXfl-004CST-1G; Fri, 24 Feb 2023 13:59:37 +0100 From: Johannes Berg To: linux-wireless@vger.kernel.org Cc: Linus Torvalds , netdev@vger.kernel.org, Larry Finger , Nicolas Cavallari , Johannes Berg Subject: [PATCH] wifi: wext: warn about usage only once Date: Fri, 24 Feb 2023 13:59:34 +0100 Message-Id: <20230224135933.94104aeda1a0.Ie771c6a66d7d6c3cf67da5f3b0c66cea66fd514c@changeid> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Johannes Berg Warn only once since the ratelimit parameters are still allowing too many messages to happen. This will no longer tell you all the different processes, but still gives a heads-up of sorts. Also modify the message to note that wext stops working for future Wi-Fi 7 hardware, this is already implemented in commit 4ca69027691a ("wifi: wireless: deny wireless extensions on MLO-capable devices") and is maybe of more relevance to users than the fact that we'd like to have wireless extensions deprecated. The issue with Wi-Fi 7 is that you can now have multiple connections to the same AP, so a whole bunch of things now become per link rather than per netdev, which can't really be handled in wireless extensions. Signed-off-by: Johannes Berg --- Not really sure I see a better solution ... - tracking it per task would be nice in a way I guess, but is also awful; - adjusting the rate limit will lead us into an endless bikeshedding discussion about the parameters; - removing the warning will leave us with no indiciation of what happens with Wi-Fi 7 hardware, although most of the processes using them now (like Chrome browser??) probably ignore failures from it - trying to support a 30+ year old technology on modern Wi-Fi 7 hardware will be "interesting" and lead to all kinds of hacks there --- net/wireless/wext-core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/wireless/wext-core.c b/net/wireless/wext-core.c index 13a72b17248e..a125fd1fa134 100644 --- a/net/wireless/wext-core.c +++ b/net/wireless/wext-core.c @@ -641,8 +641,8 @@ static void wireless_warn_cfg80211_wext(void) { char name[sizeof(current->comm)]; - pr_warn_ratelimited("warning: `%s' uses wireless extensions that are deprecated for modern drivers; use nl80211\n", - get_task_comm(name, current)); + pr_warn_once("warning: `%s' uses wireless extensions which will stop working for Wi-Fi 7 hardware; use nl80211\n", + get_task_comm(name, current)); } #endif