From patchwork Mon Jan 12 19:41:42 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Greear X-Patchwork-Id: 5615871 Return-Path: X-Original-To: patchwork-ath10k@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 618079F358 for ; Mon, 12 Jan 2015 19:42:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9246F204D8 for ; Mon, 12 Jan 2015 19:42:23 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A9FFB204CF for ; Mon, 12 Jan 2015 19:42:22 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YAksS-0005pX-SF; Mon, 12 Jan 2015 19:42:16 +0000 Received: from mail2.candelatech.com ([208.74.158.173]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YAksP-0005Zr-91 for ath10k@lists.infradead.org; Mon, 12 Jan 2015 19:42:13 +0000 Received: from ben-dt2.candelatech.com. (unknown [50.251.239.81]) by mail2.candelatech.com (Postfix) with ESMTP id 8F81140C093; Mon, 12 Jan 2015 11:41:51 -0800 (PST) From: greearb@candelatech.com To: ath10k@lists.infradead.org Subject: [PATCH 1/8] ath10k: scan should handle scan-start-failed event properly. Date: Mon, 12 Jan 2015 11:41:42 -0800 Message-Id: <1421091709-19891-1-git-send-email-greearb@candelatech.com> X-Mailer: git-send-email 1.7.11.7 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150112_114213_368870_40B1F0EC X-CRM114-Status: UNSURE ( 9.51 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.0 (/) Cc: Ben Greear , linux-wireless@vger.kernel.org X-BeenThere: ath10k@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "ath10k" Errors-To: ath10k-bounces+patchwork-ath10k=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ben Greear In case firmware fails to start the scan, then complete the start condition and clean up so that driver does not block on timeout. Signed-off-by: Ben Greear --- drivers/net/wireless/ath/ath10k/mac.c | 11 +++++++++++ drivers/net/wireless/ath/ath10k/wmi.c | 20 ++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 249107d..924879f 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -2375,6 +2375,17 @@ static int ath10k_start_scan(struct ath10k *ar, return -ETIMEDOUT; } + /* If we failed to start the scan, return error code at + * this point. This is probably due to some issue in the + * firmware, but no need to wedge the driver due to that... + */ + spin_lock_bh(&ar->data_lock); + if (ar->scan.state == ATH10K_SCAN_IDLE) { + spin_unlock_bh(&ar->data_lock); + return -EINVAL; + } + spin_unlock_bh(&ar->data_lock); + /* Add a 200ms margin to account for event/command processing */ ieee80211_queue_delayed_work(ar->hw, &ar->scan.timeout, msecs_to_jiffies(arg->max_scan_time+200)); diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c index 6e4ece0..203bcb9 100644 --- a/drivers/net/wireless/ath/ath10k/wmi.c +++ b/drivers/net/wireless/ath/ath10k/wmi.c @@ -916,6 +916,25 @@ static void ath10k_wmi_event_scan_started(struct ath10k *ar) } } +static void ath10k_wmi_event_scan_start_failed(struct ath10k *ar) +{ + lockdep_assert_held(&ar->data_lock); + + switch (ar->scan.state) { + case ATH10K_SCAN_IDLE: + case ATH10K_SCAN_RUNNING: + case ATH10K_SCAN_ABORTING: + ath10k_warn(ar, "received scan start failed event in an invalid scan state: %s (%d)\n", + ath10k_scan_state_str(ar->scan.state), + ar->scan.state); + break; + case ATH10K_SCAN_STARTING: + complete(&ar->scan.started); + __ath10k_scan_finish(ar); + break; + } +} + static void ath10k_wmi_event_scan_completed(struct ath10k *ar) { lockdep_assert_held(&ar->data_lock); @@ -1057,6 +1076,7 @@ static int ath10k_wmi_event_scan(struct ath10k *ar, struct sk_buff *skb) break; case WMI_SCAN_EVENT_START_FAILED: ath10k_warn(ar, "received scan start failure event\n"); + ath10k_wmi_event_scan_start_failed(ar); break; case WMI_SCAN_EVENT_DEQUEUED: case WMI_SCAN_EVENT_PREEMPTED: