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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 84AE0E9D40D for ; Wed, 4 Feb 2026 16:49:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=6SYdVhNGU3D9fq53FA8dnp4FDuDt1w/ap5/WjW9al6I=; b=y/RCDmC9RpSDKA61uxoWa6TKeM fR8oZRqGaWPRJwCTJZRMp7np0RFh8AwohyZJTb0lEsre2i0L/GJhg8P/rWcydjd1C2VJeRaQhJrAu CTiiwArhLZ0hlDuy2sATyKMCLYibb/tlx3UHWDuXKBnwp1Ab3pVUKzMJATbqyJFu2Y+xQRy2IJh+P GRcBrJzKE861i3x8oWonUlS2a69l1RUm9pCjkZgwW9TgwPDdfffleLPNklBwaRQCfR7mGaaC58tU+ BbgtW1yh9rXZtYhvNFpkYY0ac/a+yBP7gz4Swp0msZevq3Pf3J/CC8JCR+2ajKskKv6sfB3cTNd9F PS3G+yiA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vng4d-00000008nKq-2O04; Wed, 04 Feb 2026 16:49:51 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vng4d-00000008nKi-05yf for ath12k@bombadil.infradead.org; Wed, 04 Feb 2026 16:49:51 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:Content-Type :MIME-Version:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:Content-ID: Content-Description:In-Reply-To:References; bh=6SYdVhNGU3D9fq53FA8dnp4FDuDt1w/ap5/WjW9al6I=; b=FHfgZL+i+AKUhbmn1PI2jeT+lV gG+SBYYn76K5VkkZLD4o6CjbdQZ9XHNjcGI4qnh+IkQRjaMxDxQCeIvwxumW9wVl4I2nIhkvmoTJ1 cjsKBPCbJNfWirPi9YTJQ6eL1RQOro5l8z2yRd8c2m7ley+hMrkUfIaRL9xLCWMYot10QcLOle0FJ MXQG0p1/NEW0UFdsQiUV/ZFJK28642lV3wuH+BMKAkIlUeK0pk6YFBy5joX7w50zDSOV6hGVTZR+l LbGJwaYtchqugMIFo8m29JW4zaILiH7eEhhntdvpw30sRpe7wyZjgBgsW8oI6dtXyz7U1apLBm+UZ SFDBU9tw==; Received: from e3i714.smtp2go.com ([158.120.86.202]) by desiato.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vng4Z-00000000v2t-2xVv for ath12k@lists.infradead.org; Wed, 04 Feb 2026 16:49:49 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=triplefau.lt; i=@triplefau.lt; q=dns/txt; s=s510616; t=1770223772; h=from : subject : to : message-id : date; bh=6SYdVhNGU3D9fq53FA8dnp4FDuDt1w/ap5/WjW9al6I=; b=jr6bow58h+BAeCOYVmTpEI2bEhinPOJ4Zez4v78i4Enqcdx+lvQwox21d3PWguMD+B9Mx ai2wQztJNTp5UdmIc0eyh4h671KNtVWbZaO2f+NuDz55oPnPTwQYM/WHuOi09hue/OzO0Kd 5XFETjtV2eesFQPNyk4kpzyG+++n6A/5wHRnjgtJwKePH9W5x1GSBO2jyzroAReJivBiJ0U oe6SxqOcEt5W3HxcRD40DMY1+w2grwdKFYKDCXDjLI8fD5evSczUEUwwrSdCQ6IGJjSQcLv Df16wws29YDru+rkpJAVW7fT+AhmkqhPDVowr3OUPUvpfwgqJKFXF3faH7BQ== Received: from [10.12.239.196] (helo=localhost) by smtpcorp.com with esmtpsa (TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.98.1-S2G) (envelope-from ) id 1vng4I-AIkwcC8jEAf-Jb0J; Wed, 04 Feb 2026 16:49:30 +0000 Date: Wed, 4 Feb 2026 17:31:28 +0100 From: Remi Pommarel To: ath12k@lists.infradead.org Cc: Remi Pommarel Subject: [BUG] ath12k: CSA with blocktx disrupts TX on other bands Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit X-Report-Abuse: Please forward a copy of this message, including all headers, to Feedback-ID: 510616m:510616apGKSTK:510616su3L7CQ_w7 X-smtpcorp-track: Mz3jvd23PbMq.UMfE8foPRQqu.RL1aWQMN9NZ X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260204_164947_968214_07652442 X-CRM114-Status: UNSURE ( 8.51 ) X-CRM114-Notice: Please train this message. X-BeenThere: ath12k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "ath12k" Errors-To: ath12k-bounces+ath12k=archiver.kernel.org@lists.infradead.org Hi, With the single phy changes introduced for MLO support, both 2.4 GHz and 5 GHz interfaces on the same dual-band chip now share the same hardware queues, even when operating on separate bands. As a result, when a Channel Switch Announcement (CSA) with blocktx is triggered on one interface (e.g., the 5 GHz vif), ieee80211_vif_block_queues_csa() pauses the shared HW queues. This unintentionally blocks TX traffic on the other interface (e.g., the 2.4 GHz vif), despite it being on a different band. I haven't tested it, but the same issue is expected to affect a single MLO AP setup, where a CSA could inadvertently pause transmission across all links. To address this class of problem, the IEEE80211_HW_HANDLES_QUIET_CSA flag was introduced. When set, it delegates queue pausing to the firmware, avoiding unnecessary disruptions in multi-vif or MLO scenarios. This approach is already used in iwlwifi/mvm, as seen in commit bbd6d0f8bc51 ("wifi: iwlwifi: mvm: advertise IEEE80211_HW_HANDLES_QUIET_CSA"). Thus, does the current ath12k firmware properly handle TX quiescing allowing IEEE80211_HW_HANDLES_QUIET_CSA to be set ? Or does it need to be handle at the driver level (likewise what has been done in iwlwifi/mvm in the commit above) ? Thanks. -- Remi