From patchwork Tue Sep 14 16:42:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jouni Malinen X-Patchwork-Id: 511455 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 2B99AC433F5 for ; Tue, 14 Sep 2021 16:42:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D7ED610A6 for ; Tue, 14 Sep 2021 16:42:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229727AbhINQny (ORCPT ); Tue, 14 Sep 2021 12:43:54 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:47772 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229675AbhINQny (ORCPT ); Tue, 14 Sep 2021 12:43:54 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1631637756; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=9g90ln5epljHjohWwqm7/A4ZVQ9dSteF76PJngkFhDw=; b=sPEG00Sc8lUphlecI4PfCfZkXPBBjKNXSm8GpcgIjTkToLX4+UDO2qQztP7sZJjhsUk/+Gja jOGGi4TPDwudDVDyHgaKki/165ZkkVzlyR0PjfdCNN95oq8vxM6e3pOydtsq8YkDevIkrWEW qK+V0OnKCInB++Kk9np+o9wTPVY= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyI3YTAwOSIsICJsaW51eC13aXJlbGVzc0B2Z2VyLmtlcm5lbC5vcmciLCAiYmU5ZTRhIl0= Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n07.prod.us-west-2.postgun.com with SMTP id 6140d0fb648642cc1c61f50e (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 14 Sep 2021 16:42:35 GMT Sender: jouni=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 6A5E1C4360C; Tue, 14 Sep 2021 16:42:35 +0000 (UTC) Received: from jouni.codeaurora.org (85-76-72-211-nat.elisa-mobile.fi [85.76.72.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jouni) by smtp.codeaurora.org (Postfix) with ESMTPSA id 9A6A0C4338F; Tue, 14 Sep 2021 16:42:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org 9A6A0C4338F Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=codeaurora.org From: Jouni Malinen To: Kalle Valo Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, Wen Gong , Jouni Malinen Subject: [PATCH 3/3] ath11k: indicate to mac80211 scan complete with aborted flag for ATH11K_SCAN_STARTING state Date: Tue, 14 Sep 2021 19:42:26 +0300 Message-Id: <20210914164226.38843-3-jouni@codeaurora.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210914164226.38843-1-jouni@codeaurora.org> References: <20210914164226.38843-1-jouni@codeaurora.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Wen Gong Scan failure can not be recovered from when running a loop of the following steps: 1. run scan: "iw wlan scan". 2. run command: echo assert > /sys/kernel/debug/ath11k/qca6490\ hw2.0/simulate_fw_crash immediately after step 1. result: scan failed and can not recover even when wlan recovery succeeds: command failed: Device or resource busy (-16) reason: When scan arrives, WMI_START_SCAN_CMDID is sent to the firmware and function ath11k_mac_op_hw_scan() returns, then simulate_fw_crash arrives and the scan started event does not arrive, and then it starts to do recovery of wlan. __ath11k_mac_scan_finish() which is called from ath11k_core_halt() is one step of recovery, it will not call ieee80211_scan_completed() by logic currently because the scan state is ATH11K_SCAN_STARTING. Thus it leads the scan not being completed in mac80211, and leads all consecutive scans failing with -EBUSY in nl80211_trigger_scan even after wlan recovery success. Indicate scan complete with aborted flag to mac80211 for ATH11K_SCAN_STARTING to allow recovery from scan failed with "Device or resource busy (-16)" after wlan recovery. Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1 Signed-off-by: Wen Gong Signed-off-by: Jouni Malinen --- drivers/net/wireless/ath/ath11k/mac.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c index 97a2c92b7b9b..e015b22b8dbf 100644 --- a/drivers/net/wireless/ath/ath11k/mac.c +++ b/drivers/net/wireless/ath/ath11k/mac.c @@ -2985,18 +2985,21 @@ void __ath11k_mac_scan_finish(struct ath11k *ar) break; case ATH11K_SCAN_RUNNING: case ATH11K_SCAN_ABORTING: + if (ar->scan.is_roc && ar->scan.roc_notify) + ieee80211_remain_on_channel_expired(ar->hw); + fallthrough; + case ATH11K_SCAN_STARTING: if (!ar->scan.is_roc) { struct cfg80211_scan_info info = { - .aborted = (ar->scan.state == - ATH11K_SCAN_ABORTING), + .aborted = ((ar->scan.state == + ATH11K_SCAN_ABORTING) || + (ar->scan.state == + ATH11K_SCAN_STARTING)), }; ieee80211_scan_completed(ar->hw, &info); - } else if (ar->scan.roc_notify) { - ieee80211_remain_on_channel_expired(ar->hw); } - fallthrough; - case ATH11K_SCAN_STARTING: + ar->scan.state = ATH11K_SCAN_IDLE; ar->scan_channel = NULL; ar->scan.roc_freq = 0;