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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 F01B5C433DF for ; Tue, 9 Jun 2020 00:17:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C359B2078D for ; Tue, 9 Jun 2020 00:17:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591661852; bh=bS5W2ONyw/SXIa/fkGa6ec0BYeEBMqk33GK3nELN/DA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=lxKaR5xIfdit5cmHtgNMQvzDKBbaq+UWD4UagIYLgmV4J6WZQpFc6Udde6taNFD0Q nmI/dQpoTXiEjE99GDDou2cOHbk4doWp1mJX3MArNGIAG67NBbcyim55B+haAmrRoL IQ0n0RCyRJz3QiiUBjK7rTuQVtj6cH/Z/nYs0yc4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732912AbgFIARb (ORCPT ); Mon, 8 Jun 2020 20:17:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:41292 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730004AbgFHXSv (ORCPT ); Mon, 8 Jun 2020 19:18:51 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A6F9E20870; Mon, 8 Jun 2020 23:18:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658331; bh=bS5W2ONyw/SXIa/fkGa6ec0BYeEBMqk33GK3nELN/DA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WT0FMiiOOWHCdtvX2pRIItQjYqFYIzA6XV7L4n7RC3YqkrWTRAgFwmA4a8bui6v2z 3GeJ32XAO22wT3R05PUcW6fsJPo8+85VIH5C7Kgol4JbT+C+5YBiyC6C9bcPz1HxgC uU2FrWXQRNH1JbAIkeb+yCtz34sJr6ghjtqSq0cI= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Maharaja Kennadyrajan , Govindaraj Saminathan , Kalle Valo , Sasha Levin , ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 002/175] ath10k: Fix the race condition in firmware dump work queue Date: Mon, 8 Jun 2020 19:15:55 -0400 Message-Id: <20200608231848.3366970-2-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608231848.3366970-1-sashal@kernel.org> References: <20200608231848.3366970-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Maharaja Kennadyrajan [ Upstream commit 3d1c60460fb2823a19ead9e6ec8f184dd7271aa7 ] There is a race condition, when the user writes 'hw-restart' and 'hard' in the simulate_fw_crash debugfs file without any delay. In the above scenario, the firmware dump work queue(scheduled by 'hard') should be handled gracefully, while the target is in the 'hw-restart'. Tested HW: QCA9984 Tested FW: 10.4-3.9.0.2-00044 Co-developed-by: Govindaraj Saminathan Signed-off-by: Govindaraj Saminathan Signed-off-by: Maharaja Kennadyrajan Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/1585213077-28439-1-git-send-email-mkenna@codeaurora.org Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath10k/pci.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c index 0a727502d14c..fd49d3419e79 100644 --- a/drivers/net/wireless/ath/ath10k/pci.c +++ b/drivers/net/wireless/ath/ath10k/pci.c @@ -2074,6 +2074,7 @@ static void ath10k_pci_hif_stop(struct ath10k *ar) ath10k_pci_irq_sync(ar); napi_synchronize(&ar->napi); napi_disable(&ar->napi); + cancel_work_sync(&ar_pci->dump_work); /* Most likely the device has HTT Rx ring configured. The only way to * prevent the device from accessing (and possible corrupting) host -- 2.25.1