From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933159Ab2JAXCg (ORCPT ); Mon, 1 Oct 2012 19:02:36 -0400 Received: from 1wt.eu ([62.212.114.60]:35549 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933151Ab2JAXCb (ORCPT ); Mon, 1 Oct 2012 19:02:31 -0400 Message-Id: <20121001225200.951589835@1wt.eu> User-Agent: quilt/0.48-1 Date: Tue, 02 Oct 2012 00:53:16 +0200 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tony Zelenoff , "David S. Miller" , Greg Kroah-Hartman , Willy Tarreau Subject: [ 079/180] atl1: fix kernel panic in case of DMA errors In-Reply-To: <6a854f579a99b4fe2efaca1057e8ae22@local> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.32-longterm review patch. If anyone has any objections, please let me know. ------------------ From: Tony Zelenoff [ Upstream commit 03662e41c7cff64a776bfb1b3816de4be43de881 ] Problem: There was two separate work_struct structures which share one handler. Unfortunately getting atl1_adapter structure from work_struct in case of DMA error was done from incorrect offset which cause kernel panics. Solution: The useless work_struct for DMA error removed and handler name changed to more generic one. Signed-off-by: Tony Zelenoff Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman Signed-off-by: Willy Tarreau --- drivers/net/atlx/atl1.c | 12 +++++------- drivers/net/atlx/atl1.h | 3 +-- drivers/net/atlx/atlx.c | 2 +- 3 files changed, 7 insertions(+), 10 deletions(-) diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c index 403bfb6..adc862f 100644 --- a/drivers/net/atlx/atl1.c +++ b/drivers/net/atlx/atl1.c @@ -2478,7 +2478,7 @@ static irqreturn_t atl1_intr(int irq, void *data) "pcie phy link down %x\n", status); if (netif_running(adapter->netdev)) { /* reset MAC */ iowrite32(0, adapter->hw.hw_addr + REG_IMR); - schedule_work(&adapter->pcie_dma_to_rst_task); + schedule_work(&adapter->reset_dev_task); return IRQ_HANDLED; } } @@ -2490,7 +2490,7 @@ static irqreturn_t atl1_intr(int irq, void *data) "pcie DMA r/w error (status = 0x%x)\n", status); iowrite32(0, adapter->hw.hw_addr + REG_IMR); - schedule_work(&adapter->pcie_dma_to_rst_task); + schedule_work(&adapter->reset_dev_task); return IRQ_HANDLED; } @@ -2635,10 +2635,10 @@ static void atl1_down(struct atl1_adapter *adapter) atl1_clean_rx_ring(adapter); } -static void atl1_tx_timeout_task(struct work_struct *work) +static void atl1_reset_dev_task(struct work_struct *work) { struct atl1_adapter *adapter = - container_of(work, struct atl1_adapter, tx_timeout_task); + container_of(work, struct atl1_adapter, reset_dev_task); struct net_device *netdev = adapter->netdev; netif_device_detach(netdev); @@ -3050,12 +3050,10 @@ static int __devinit atl1_probe(struct pci_dev *pdev, (unsigned long)adapter); adapter->phy_timer_pending = false; - INIT_WORK(&adapter->tx_timeout_task, atl1_tx_timeout_task); + INIT_WORK(&adapter->reset_dev_task, atl1_reset_dev_task); INIT_WORK(&adapter->link_chg_task, atlx_link_chg_task); - INIT_WORK(&adapter->pcie_dma_to_rst_task, atl1_tx_timeout_task); - err = register_netdev(netdev); if (err) goto err_common; diff --git a/drivers/net/atlx/atl1.h b/drivers/net/atlx/atl1.h index 146372f..0494e514 100644 --- a/drivers/net/atlx/atl1.h +++ b/drivers/net/atlx/atl1.h @@ -762,9 +762,8 @@ struct atl1_adapter { u16 link_speed; u16 link_duplex; spinlock_t lock; - struct work_struct tx_timeout_task; + struct work_struct reset_dev_task; struct work_struct link_chg_task; - struct work_struct pcie_dma_to_rst_task; struct timer_list phy_config_timer; bool phy_timer_pending; diff --git a/drivers/net/atlx/atlx.c b/drivers/net/atlx/atlx.c index 3dc0142..ce09b95 100644 --- a/drivers/net/atlx/atlx.c +++ b/drivers/net/atlx/atlx.c @@ -189,7 +189,7 @@ static void atlx_tx_timeout(struct net_device *netdev) { struct atlx_adapter *adapter = netdev_priv(netdev); /* Do the reset outside of interrupt context */ - schedule_work(&adapter->tx_timeout_task); + schedule_work(&adapter->reset_dev_task); } /* -- 1.7.2.1.45.g54fbc