From patchwork Wed Aug 18 11:31:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Loic Poulain X-Patchwork-Id: 499457 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,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=ham 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 94BAAC4320A for ; Wed, 18 Aug 2021 11:21:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7ADD460524 for ; Wed, 18 Aug 2021 11:21:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235508AbhHRLWS (ORCPT ); Wed, 18 Aug 2021 07:22:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235428AbhHRLWR (ORCPT ); Wed, 18 Aug 2021 07:22:17 -0400 Received: from mail-wr1-x434.google.com (mail-wr1-x434.google.com [IPv6:2a00:1450:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1B45C0613CF for ; Wed, 18 Aug 2021 04:21:42 -0700 (PDT) Received: by mail-wr1-x434.google.com with SMTP id x12so2897925wrr.11 for ; Wed, 18 Aug 2021 04:21:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id; bh=Um/2sZ3CB494B6HeG+9P8o7byJNXyi5wGDTtlcjbk+s=; b=hcrnhKgaO1CHkap09gVEmCMFB9lXUXpNfHvCPihvFm+vJF/IZuGVQ6KA4qHI0rL4VH iasHqMhp1iabAu6WVi6Hgi1a5Ug/P3O2ZoDXN3D/bq60ILjYpTR+aD0vr9AAnilWvGQK KRcxvnESm/jgjZmTjVgIvBudMZwcCoeUjq0tS4i/+cqd9yNQ3nEjMeYsY3J7mBCaZf3T vjREA1hqXObyhTrbTjehllRbF7GN17WhVnl2KjNEJHgKulS8hR3LZaThGWAYIqmhxaZU bADSHIE+4D+RGdFhtLQN+vdEsH4BrlRheh+Fr+0wzPoOgCcRFZRyfg5VtKNCkvJ/GRzy LRnQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=Um/2sZ3CB494B6HeG+9P8o7byJNXyi5wGDTtlcjbk+s=; b=MS9QZTY2mLGtDHcsbDQaKlw4G97nzwac9Oc1EQAVwTclXrXXUZOfkCEmJcgMWpJq4N C11SB0c4RVKPrhHa7BQIh5dGwzMhgBhtAilImY6VbVsdOSU3GksjpMd/3h/3c/0imKRY MqkG59HYMspIDEDOrPFQGVBbt/f7Y/7ZG8DpS8I9Uv+edLWKpuUbWmVsVcHv5eFvHeXO 9D4fHo+XFiTonndrttEiXSDjesUeMA1cFqXmdCzvUVkaE0HrVFOcZPyKZ/kpV5Jce+Ji 1MIgRxoyJ/ytG6E8LObjyqk2oRaFSXr7DgW+wLn6Hx3iPl6qxFGMNSCbwMwFx69msf1P 1oqw== X-Gm-Message-State: AOAM530JlE1oIOJOSHuVHwIrjyfqKmfcm8sUAqkAiR+NXuuB7Ued7L3A 6pbC7v2LXnB7iORPepGfgzhqEmZZz4lB4w== X-Google-Smtp-Source: ABdhPJzQ/jynJGWIh+7IAo8D7U1jUkqkL3mh2SBtAj15V9XxmKfBdFtfXVBJm/9JSE112jnbYGcZ4g== X-Received: by 2002:a5d:4d03:: with SMTP id z3mr10058223wrt.229.1629285701121; Wed, 18 Aug 2021 04:21:41 -0700 (PDT) Received: from localhost.localdomain ([2a01:e0a:82c:5f0:69b5:b274:5cfc:ef2]) by smtp.gmail.com with ESMTPSA id e4sm5744270wrw.74.2021.08.18.04.21.40 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 18 Aug 2021 04:21:40 -0700 (PDT) From: Loic Poulain To: kvalo@codeaurora.org Cc: bryan.odonoghue@linaro.org, wcn36xx@lists.infradead.org, linux-wireless@vger.kernel.org, Joseph Gates , stable@vger.kernel.org, Loic Poulain Subject: [PATCH] wcn36xx: Ensure finish scan is not requested before start scan Date: Wed, 18 Aug 2021 13:31:43 +0200 Message-Id: <1629286303-13179-1-git-send-email-loic.poulain@linaro.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Joseph Gates If the operating channel is the first in the scan list, it was seen that a finish scan request would be sent before a start scan request was sent, causing the firmware to fail all future scans. Track the current channel being scanned to avoid requesting the scan finish before it starts. Cc: Fixes: 5973a2947430 ("wcn36xx: Fix software-driven scan") Signed-off-by: Joseph Gates Signed-off-by: Loic Poulain --- drivers/net/wireless/ath/wcn36xx/main.c | 5 ++++- drivers/net/wireless/ath/wcn36xx/wcn36xx.h | 1 + 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c index dabed4e..e8c772a 100644 --- a/drivers/net/wireless/ath/wcn36xx/main.c +++ b/drivers/net/wireless/ath/wcn36xx/main.c @@ -405,13 +405,14 @@ static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed) wcn36xx_dbg(WCN36XX_DBG_MAC, "wcn36xx_config channel switch=%d\n", ch); - if (wcn->sw_scan_opchannel == ch) { + if (wcn->sw_scan_opchannel == ch && wcn->sw_scan_channel) { /* If channel is the initial operating channel, we may * want to receive/transmit regular data packets, then * simply stop the scan session and exit PS mode. */ wcn36xx_smd_finish_scan(wcn, HAL_SYS_MODE_SCAN, wcn->sw_scan_vif); + wcn->sw_scan_channel = 0; } else if (wcn->sw_scan) { /* A scan is ongoing, do not change the operating * channel, but start a scan session on the channel. @@ -419,6 +420,7 @@ static int wcn36xx_config(struct ieee80211_hw *hw, u32 changed) wcn36xx_smd_init_scan(wcn, HAL_SYS_MODE_SCAN, wcn->sw_scan_vif); wcn36xx_smd_start_scan(wcn, ch); + wcn->sw_scan_channel = ch; } else { wcn36xx_change_opchannel(wcn, ch); } @@ -699,6 +701,7 @@ static void wcn36xx_sw_scan_start(struct ieee80211_hw *hw, wcn->sw_scan = true; wcn->sw_scan_vif = vif; + wcn->sw_scan_channel = 0; if (vif_priv->sta_assoc) wcn->sw_scan_opchannel = WCN36XX_HW_CHANNEL(wcn); else diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h index 71fa999..d0fcce8 100644 --- a/drivers/net/wireless/ath/wcn36xx/wcn36xx.h +++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx.h @@ -232,6 +232,7 @@ struct wcn36xx { struct cfg80211_scan_request *scan_req; bool sw_scan; u8 sw_scan_opchannel; + u8 sw_scan_channel; struct ieee80211_vif *sw_scan_vif; struct mutex scan_lock; bool scan_aborted;