From patchwork Fri Aug 6 10:23:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Fuzzey X-Patchwork-Id: 493574 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 18199C4338F for ; Fri, 6 Aug 2021 10:23:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF2696113B for ; Fri, 6 Aug 2021 10:23:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245018AbhHFKXu (ORCPT ); Fri, 6 Aug 2021 06:23:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244954AbhHFKXq (ORCPT ); Fri, 6 Aug 2021 06:23:46 -0400 Received: from mail-wr1-x464.google.com (mail-wr1-x464.google.com [IPv6:2a00:1450:4864:20::464]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 20899C06179B for ; Fri, 6 Aug 2021 03:23:27 -0700 (PDT) Received: by mail-wr1-x464.google.com with SMTP id d8so10420335wrm.4 for ; Fri, 06 Aug 2021 03:23:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=flowbird.group; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=qphV1UcRjge2f2QoEepAIJxuHV1jIZ3jSQsxy+knXZI=; b=ujfmDI2AAQF+MurXTHnpo8P27V1ad3GsXKIziWkct345KS2TZTsy/si3spwPOw99H/ /W4pmjid9yhJuYH01O9I22vUGtTGOonlos5vfzHrmSUjtCWeMziE+paiLEDkv2QSJDkl YYwVtYrIsxtS5RiWNl1WY/VlXrqHFk76G6SO2Cse/ckpnfK5pcirXIv4SoUktPO1xenM wAfddU8kFPOhfhlvvdfAmXcPuapeRen5Ahb5wi20G/P9JZp4hBC3J9lB9R2ws4lofBy5 EbxM0EUxAFLGK+sfipmX6F17QS2xALQNwt/ElNbpLn69GlC/yW4S+lE2mpnKiDh/56W1 vJ8w== 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:in-reply-to :references; bh=qphV1UcRjge2f2QoEepAIJxuHV1jIZ3jSQsxy+knXZI=; b=Ttw8isnlWD5GERLlFs/f7BndFMEvNxvp0Ca3SsTahehkSmCcp4wzyTkRaowDU7c5A/ JrNhK8aFZzpsm2vLLwXFQ4ux7cuUBK7giHKHOCxVZr0VQHULy5r5Wau4Nsc9bGO2X9Z3 yLDg9LRbDamZRtlO7zMaodyhSOzYzMV4IwvkoU3NO3pk1ZOxNU9XXXDe1NpazVALedd3 RDjXRSORWCM0/yKNemnBWooLMkX7TIGfPE1oV/e8hlGJ80vpGY8Q2agnG7pguPQee0n3 pYBGVuW/2oKXsMAysioHH8rwuRm/oRKk5moXleObKklJ6YsBKHP/KXrFfJ9XRs9tTs8v J1Qg== X-Gm-Message-State: AOAM531RTyuj/LtqbBU/+QjdDeY6EvtZBhDtQ1RIQQWizcT0d+tbAr3J +IYCrBceA05gJvJ+UOaJChJ+ODzlSYhfPfzGj2vvL0UnvQ1olAQ3W/qKd7w074owvUT4ufT7nvD bOuh2IUM8Jx0mjV92VSe9854uoP0jH0eNy3OCMYzeeS8a+6XffQ3upPXWuc28QJynh45AKEleG3 2oKKV7vhvQuD0RTwl6rO1ViWhoCH7eIA== X-Google-Smtp-Source: ABdhPJyF93LVLizAR3yDMuYiFK8gpPsMnZgLNQ0LXZr08VSCOKJo1OIj2kfK+jcjsA4FKVpdqH9AGs4IBB20 X-Received: by 2002:a05:6000:2c6:: with SMTP id o6mr9924660wry.241.1628245405557; Fri, 06 Aug 2021 03:23:25 -0700 (PDT) Received: from mta1.parkeon.com ([185.149.63.251]) by smtp-relay.gmail.com with ESMTPS id u11sm309269wrg.5.2021.08.06.03.23.25 (version=TLS1 cipher=AES128-SHA bits=128/128); Fri, 06 Aug 2021 03:23:25 -0700 (PDT) X-Relaying-Domain: flowbird.group Received: from [172.16.12.14] (port=47598 helo=PC12445-BES.dynamic.besancon.parkeon.com) by mta1.parkeon.com with esmtp (Exim 4.71) (envelope-from ) id 1mBx0f-0006b1-3G; Fri, 06 Aug 2021 12:23:25 +0200 From: Martin Fuzzey To: linux-wireless@vger.kernel.org Cc: Amitkumar Karwar , Siva Rebbagondla , Kalle Valo , Jakub Kicinski , Prameela Rani Garnepudi , linux-kernel@vger.kernel.org, Martin Fuzzey Subject: [PATCH 1/3] rsi: fix occasional initialisation failure with BT coex Date: Fri, 6 Aug 2021 12:23:21 +0200 Message-Id: <1628245403-2517-2-git-send-email-martin.fuzzey@flowbird.group> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1628245403-2517-1-git-send-email-martin.fuzzey@flowbird.group> References: <1628245403-2517-1-git-send-email-martin.fuzzey@flowbird.group> Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org When BT coexistence is enabled (eg oper mode 13, which is the default) the initialisation on startup sometimes silently fails. In a normal initialisation we see usb 1-1.3: Product: Wireless USB Network Module usb 1-1.3: Manufacturer: Redpine Signals, Inc. usb 1-1.3: SerialNumber: 000000000001 rsi_91x: rsi_probe: Initialized os intf ops rsi_91x: rsi_load_9116_firmware: Loading chunk 0 rsi_91x: rsi_load_9116_firmware: Loading chunk 1 rsi_91x: rsi_load_9116_firmware: Loading chunk 2 rsi_91x: Max Stations Allowed = 1 But sometimes the last log is missing and the wlan net device is not created. Running a userspace loop that resets the hardware via a GPIO shows the problem occurring ~5/100 resets. The problem does not occur in oper mode 1 (wifi only). Adding logs shows that the initialisation state machine requests a MAC reset via rsi_send_reset_mac() but the firmware does not reply, leading to the initialisation sequence being incomplete. Fix this by delaying attaching the BT adapter until the wifi initialisation has completed. With this applied I have done > 300 reset loops with no errors. Fixes: 716b840c7641 ("rsi: handle BT traffic in driver") Signed-off-by: Martin Fuzzey CC: stable@vger.kernel.org --- drivers/net/wireless/rsi/rsi_91x_main.c | 16 +++++++++++++--- drivers/net/wireless/rsi/rsi_91x_mgmt.c | 3 +++ drivers/net/wireless/rsi/rsi_main.h | 3 ++- 3 files changed, 18 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/rsi/rsi_91x_main.c b/drivers/net/wireless/rsi/rsi_91x_main.c index 29d8304..aece1d3 100644 --- a/drivers/net/wireless/rsi/rsi_91x_main.c +++ b/drivers/net/wireless/rsi/rsi_91x_main.c @@ -210,9 +210,10 @@ int rsi_read_pkt(struct rsi_common *common, u8 *rx_pkt, s32 rcv_pkt_len) bt_pkt_type = frame_desc[offset + BT_RX_PKT_TYPE_OFST]; if (bt_pkt_type == BT_CARD_READY_IND) { rsi_dbg(INFO_ZONE, "BT Card ready recvd\n"); - if (rsi_bt_ops.attach(common, &g_proto_ops)) - rsi_dbg(ERR_ZONE, - "Failed to attach BT module\n"); + if (common->fsm_state == FSM_MAC_INIT_DONE) + rsi_attach_bt(common); + else + common->bt_defer_attach = true; } else { if (common->bt_adapter) rsi_bt_ops.recv_pkt(common->bt_adapter, @@ -277,6 +278,15 @@ void rsi_set_bt_context(void *priv, void *bt_context) } #endif +void rsi_attach_bt(struct rsi_common *common) +{ +#ifdef CONFIG_RSI_COEX + if (rsi_bt_ops.attach(common, &g_proto_ops)) + rsi_dbg(ERR_ZONE, + "Failed to attach BT module\n"); +#endif +} + /** * rsi_91x_init() - This function initializes os interface operations. * @void: Void. diff --git a/drivers/net/wireless/rsi/rsi_91x_mgmt.c b/drivers/net/wireless/rsi/rsi_91x_mgmt.c index ed67f65..50c4b9b 100644 --- a/drivers/net/wireless/rsi/rsi_91x_mgmt.c +++ b/drivers/net/wireless/rsi/rsi_91x_mgmt.c @@ -2056,6 +2056,9 @@ static int rsi_handle_ta_confirm_type(struct rsi_common *common, if (common->reinit_hw) { complete(&common->wlan_init_completion); } else { + if (common->bt_defer_attach) + rsi_attach_bt(common); + return rsi_mac80211_attach(common); } } diff --git a/drivers/net/wireless/rsi/rsi_main.h b/drivers/net/wireless/rsi/rsi_main.h index b3e25bc..b983cc5 100644 --- a/drivers/net/wireless/rsi/rsi_main.h +++ b/drivers/net/wireless/rsi/rsi_main.h @@ -320,6 +320,7 @@ struct rsi_common { struct ieee80211_vif *roc_vif; bool eapol4_confirm; + bool bt_defer_attach; void *bt_adapter; struct cfg80211_scan_request *hwscan; @@ -401,5 +402,5 @@ struct rsi_host_intf_ops { enum rsi_host_intf rsi_get_host_intf(void *priv); void rsi_set_bt_context(void *priv, void *bt_context); - +void rsi_attach_bt(struct rsi_common *common); #endif