From patchwork Thu Sep 18 06:30:41 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wojciech Dubowik X-Patchwork-Id: 4929371 Return-Path: X-Original-To: patchwork-linux-wireless@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 9456E9F350 for ; Thu, 18 Sep 2014 06:39:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C0FE720142 for ; Thu, 18 Sep 2014 06:40:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1758220138 for ; Thu, 18 Sep 2014 06:40:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752871AbaIRGkN (ORCPT ); Thu, 18 Sep 2014 02:40:13 -0400 Received: from mail.neratec.com ([46.140.151.2]:20461 "EHLO mail.neratec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751111AbaIRGkM (ORCPT ); Thu, 18 Sep 2014 02:40:12 -0400 X-Greylist: delayed 557 seconds by postgrey-1.27 at vger.kernel.org; Thu, 18 Sep 2014 02:40:12 EDT Received: from localhost (localhost [127.0.0.1]) by mail.neratec.com (Postfix) with ESMTP id 233618E3FE9; Thu, 18 Sep 2014 08:30:50 +0200 (CEST) Received: from mail.neratec.com ([127.0.0.1]) by localhost (mail.neratec.com [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id NsnZskyLk-k0; Thu, 18 Sep 2014 08:30:49 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by mail.neratec.com (Postfix) with ESMTP id BE8A98E3FEA; Thu, 18 Sep 2014 08:30:49 +0200 (CEST) X-Virus-Scanned: amavisd-new at neratec.com Received: from mail.neratec.com ([127.0.0.1]) by localhost (mail.neratec.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id mmadVbr6Ct0Z; Thu, 18 Sep 2014 08:30:49 +0200 (CEST) Received: from CHB500181.neratec.local (unknown [192.168.11.68]) by mail.neratec.com (Postfix) with ESMTPSA id 988D28E3FE5; Thu, 18 Sep 2014 08:30:49 +0200 (CEST) From: Wojciech Dubowik To: linville@tuxdriver.com Cc: linux-wireless@vger.kernel.org, ath9k-devel@lists.ath9k.org, Wojciech Dubowik Subject: [PATCH] ath9k: Fix NULL pointer dereference on early irq Date: Thu, 18 Sep 2014 08:30:41 +0200 Message-Id: <1411021841-12683-1-git-send-email-Wojciech.Dubowik@neratec.com> X-Mailer: git-send-email 1.9.1 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 The ah struct might not have been initialized when interrupt comes so check for it. Signed-off-by: Wojciech Dubowik --- drivers/net/wireless/ath/ath9k/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 3e485f7..fbf23ac 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -504,7 +504,7 @@ irqreturn_t ath_isr(int irq, void *dev) * touch anything. Note this can happen early * on if the IRQ is shared. */ - if (test_bit(ATH_OP_INVALID, &common->op_flags)) + if (!ah || test_bit(ATH_OP_INVALID, &common->op_flags)) return IRQ_NONE; /* shared irq, not for us */