Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933729AbZJGOpk (ORCPT ); Wed, 7 Oct 2009 10:45:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759111AbZJGOpk (ORCPT ); Wed, 7 Oct 2009 10:45:40 -0400 Received: from smtp.ispras.ru ([83.149.198.201]:43320 "EHLO smtp.ispras.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751774AbZJGOpj (ORCPT ); Wed, 7 Oct 2009 10:45:39 -0400 From: Alexander Strakh Organization: ISP RAS To: "David S. Miller" , netdev@vger.kernel.org, Linux Kernlel Mailing List Subject: [BUG] znet.c sleeping function called from invalid context Date: Wed, 7 Oct 2009 18:47:37 +0000 User-Agent: KMail/1.10.3 (Linux/2.6.27.29-0.1-default; KDE/4.1.3; x86_64; ; ) MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200910071847.38163.strakh@ispras.ru> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 830 Lines: 25 KERNEL_VERSION: 2.6.31 DESCRIBE: Driver drivers/net/znet.c might sleep in atomic context, because it calls free_dma under claim_dma_lock: .drivers/net/znet.c: 168 static int znet_request_resources (struct net_device *dev) ... 189 flags = claim_dma_lock(); 190 free_dma (znet->tx_dma); 191 release_dma_lock (flags); ... Path to might_sleep macro from znet_request_resources: 1. znet_request_resources calls free_dma at arch/blackfin/kernel/bfin_dma_5xx.c:181 2. free_dma calls arch/blackfin/kernel/bfin_dma_5xx.c:195 Found by: Linux Driver Verification -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/