From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=212.77.101.9 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793262006; b=dTXvzOEgICVTyUrj47QfLkcR9uL5fy1nEQoi9wY7qjNO3S2hi4UR/+Uof9ozn3Iflxsy S1l6kp0lEMDgCZfvM6wAFyzMmbzf9qnHCZitooLkr2Qwk6BSIks5ADnfXfE1rNLdnzZNR wxoFNPTV6CyE0Hue1cJ5t0m0a2+Ox6nQnnA5V7LXr5lujbIfahdTYyhKSbONf87vKS47r DMFCHiS62oBm1h9DsjABxzemm6F/7FFMOov/1BQY9i5N3DJrTqYE43S8XM4Gh/aR2FJCf 9nbAiUtUOAb1tHGkSCTEf5Max0te7Y6GqYKBX3hIwEYBiXqwndUySx85Oc+KkO0bvdg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793262006; h=DMARC-Filter:Received:DKIM-Signature:Received:Date:From:To:Cc: Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To:X-WP-MailID:X-WP-AV:X-WP-SPAM; bh=hq49hLBHa7UxfN5Y7PY1/zeZc0Rq/8U/5K7+yWJjlb8=; b=yT5iOZYCqSvTo4BEgX29yI8dHaLkPRjl11+00OPYaUxO9BLaGTYZfqCqvJcDKSQTRE/3 htTrCK2IlNifHvfU4C+deRVaZ2pNh7VMOv+1J0yG6eCg3jXQlDJHHLMegys6aWMwis9Zt /Pfw35tl6C1o36PwZS95811fQsrJbX9vM1SaKDmXeZGmfDcwx0qh2uhRH0uC5xPlTLbNq qiSk6I0+TMx87Gq9WOyt2s+RQthK0fDl2VRI5iFtJo4JFpZcGoxQS2fBdAJgEqaaYvQ0v 7rZa01hJ8CNdLVen0dz/9bLG58RcjFstYFqJo0G2hLOe90e8bfRqyEg8CfHRG7/izWg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=wp.pl; spf=pass smtp.mailfrom=wp.pl; dkim=pass header.d=wp.pl header.i=@wp.pl header.a=rsa-sha256 header.s=s20261001 header.b=QIMHzxMr; arc=none smtp.remote-ip=212.77.101.9 Received: from mx3.wp.pl (mx3.wp.pl [212.77.101.9]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DCA7B606A320 for ; Thu, 29 Oct 2026 08:20:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org DCA7B606A320 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=wp.pl Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=wp.pl Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=wp.pl header.i=@wp.pl header.a=rsa-sha256 header.s=s20261001 header.b=QIMHzxMr Received: (wp-smtpd smtp.wp.pl 19003 invoked from network); 29 Oct 2026 09:19:56 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wp.pl; s=s20261001; t=1793261996; bh=hq49hLBHa7UxfN5Y7PY1/zeZc0Rq/8U/5K7+yWJjlb8=; h=From:To:Cc:Subject; b=QIMHzxMrXKyvbvSPf9r3zdRNpzdUXlqA9y9T+e0eXS1souqtzoh16entuXwVA90XY M3fNHWJ7hzfryk1SjVAppe86hzO9mafjrdFxpQpW+uCSr77xtdbvxySibggXUMA1Hn luhOT3bkTrmlVbqFPYxAVh9t25uH4kUISSUcSWnrsGn9e93jg3AGs9Cm0jFwp68v1M ZUcM80POHLdc0k/otEl3iGEaPLRy+ykIVPdx9/Ln6VTShgOUvDcAu5moUZ6elDPwCS BOO8kSRl0nvlV6WVHM6aJbPN3lAtRN1Ti9JkI8YCxkM5pnzVT/GU63v19qkImA1KdI yZeL0RKr1ySrQ== Received: from localhost (77-236-11-144.static.play.pl [77.236.11.144]) (envelope-sender ) by smtp.wp.pl (WP-SMTPD) with TLS_AES_256_GCM_SHA384 encrypted SMTP for ; 29 Oct 2026 09:19:56 +0100 Date: Thu, 29 Oct 2026 09:19:55 +0100 From: Stanislaw Gruszka To: Zhao Li Cc: Wey-Yi Guy , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] wifi: iwlegacy: unregister the LED if 3945 hardware registration fails Message-ID: <20261029081955.GA10212@wp.pl> References: <20261028142328.18560-1-enderaoelyther@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261028142328.18560-1-enderaoelyther@gmail.com> X-WP-MailID: 075bfac9a22155880d5d6a0228c06ea4 X-WP-AV: skaner antywirusowy Poczty Wirtualnej Polski X-WP-SPAM: NO 0000001 [4eLx] Hi, On Wed, Oct 28, 2026 at 10:23:28PM +0800, Zhao Li wrote: > If ieee80211_register_hw() fails during 3945 setup, later LED callbacks > can access hardware and driver state that probe has already freed. > > il3945_setup_mac() registers the LED before the mac80211 hardware, but > its registration error path does not call il_leds_exit(). The analogous > 4965 failure releases the driver and reaches its existing remove cleanup. Could you explain exacly how this is fixed in 4965? I do not see this in the code. Regards Stanislaw > Unregister the 3945 LED before unwinding a failed hardware registration. > > LLM assistance was used to find the bug and review. > > Fixes: 5ed540aecc2a ("iwlwifi: use mac80211 throughput trigger") > Cc: stable@vger.kernel.org > Signed-off-by: Zhao Li > --- > Validation: A W=1 module build with MODPOST passed. Not > reproduced; 3945 hardware was unavailable. > Sparse C=2 passed. Targeted Smatch introduced no new diagnostics. > > drivers/net/wireless/intel/iwlegacy/3945-mac.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/net/wireless/intel/iwlegacy/3945-mac.c b/drivers/net/wireless/intel/iwlegacy/3945-mac.c > index f7ca182d1494..5e11f0597255 100644 > --- a/drivers/net/wireless/intel/iwlegacy/3945-mac.c > +++ b/drivers/net/wireless/intel/iwlegacy/3945-mac.c > @@ -3529,6 +3529,7 @@ il3945_setup_mac(struct il_priv *il) > ret = ieee80211_register_hw(il->hw); > if (ret) { > IL_ERR("Failed to register hw (error %d)\n", ret); > + il_leds_exit(il); > return ret; > } > il->mac80211_registered = 1; > > base-commit: 25e73f1d6868c759c8eb56cad4e411692c5341b4 > -- > 2.56.0 >